chore: checkpoint admin editor and perf work

backend/Cargo.toml

@@ -42,10 +42,12 @@ unic-langid = { version = "0.9" }
 # /view engine
 axum-extra = { version = "0.10", features = ["form"] }
 tower-http = { version = "0.6", features = ["cors"] }
-reqwest = { version = "0.12", default-features = false, features = ["blocking", "json", "rustls-tls"] }
+reqwest = { version = "0.12", default-features = false, features = ["blocking", "json", "multipart", "rustls-tls"] }
 fastembed = "5.1"
 async-stream = "0.3"
 base64 = "0.22"
+aws-config = "1"
+aws-sdk-s3 = "1"
 
 [[bin]]
 name = "termi_api-cli"

backend/assets/views/admin/site_settings.html

@@ -83,8 +83,9 @@
             <div class="field-hint">关闭后，前台导航不会显示 AI 页面，公开接口也不会对外提供回答。Embedding 已改为后端本地生成，并使用 PostgreSQL 的 pgvector 存储与检索。</div>
         </div>
         <div class="field">
-            <label>聊天 Provider</label>
+            <label>接入类型 / 协议</label>
             <input name="ai_provider" value="{{ form.ai_provider }}" placeholder="newapi">
+            <div class="field-hint">这里是后端适配器类型，不是模型厂商名。`newapi` 表示走 NewAPI 兼容的 Responses 接口；厂商和型号建议写在你的通道备注与模型名里。</div>
         </div>
         <div class="field">
             <label>聊天 API Base</label>
@@ -121,7 +122,7 @@
                 <button type="submit" class="btn btn-primary">保存设置</button>
                 <button type="button" id="reindex-btn" class="btn">重建 AI 索引</button>
             </div>
-            <div class="field-hint" style="margin-top: 10px;">文章内容变化后建议手动重建一次 AI 索引。本地 embedding 使用后端内置 `fastembed` 生成，向量会写入 PostgreSQL 的 `pgvector` 列，并通过 HNSW 索引做相似度检索；聊天回答默认走 `newapi -> /responses -> gpt-5.4`。</div>
+            <div class="field-hint" style="margin-top: 10px;">文章内容变化后建议手动重建一次 AI 索引。本地 embedding 使用后端内置 `fastembed` 生成，向量会写入 PostgreSQL 的 `pgvector` 列，并通过 HNSW 索引做相似度检索；聊天回答默认走 `newapi -> /responses -> gpt-5.4`。前台用户提交过的搜索词和 AI 问题会单独写入分析日志，方便在新版后台里查看。</div>
             <div id="notice" class="notice"></div>
         </div>
     </form>

backend/content/posts/redis.md

@@ -1,15 +1,18 @@
 ---
-title: "Redis常用命令"
-description: 
-date: 2022-04-21T09:42:24+08:00
-draft: false
+title: "Redis 安装与常用命令整理"
 slug: redis
-image:
-categories:
-  - Database
+description: "文章介绍了 Redis 在 Debian 下的安装方法、Windows 图形客户端的安装方式，以及监听端口修改、BitMap、消息队列、LREM 和 Pipeline 等常用操作示例。"
+category: "数据库"
+post_type: "article"
+pinned: false
+published: true
 tags:
-  - Database
-  - Redis
+  - "Redis安装"
+  - "Debian"
+  - "BitMap"
+  - "消息队列"
+  - "Pipeline"
+  - "go-redis"
 ---
 
 # 安装`Redis`

backend/content/posts/tmux.md

@@ -1,15 +1,17 @@
 ---
-title: "如何在 Tmux 会话窗格中发送命令"
-description: 本文介绍了在 Tmux 中发送命令的步骤，包括新建分离会话、发送命令至会话窗格、连接会话窗格、以及发送特殊命令。通过本文，读者将了解如何在 Tmux 中发送命令，并能够更加高效地使用 Tmux。
-date: 2022-08-02T14:54:08+08:00
-draft: false
+title: "在 Tmux 会话窗格中发送命令的方法"
 slug: tmux
-image:
-categories:
-  - Linux
+description: "介绍如何在 Tmux 中创建分离会话、向指定窗格发送命令并执行回车，同时说明连接会话和发送特殊按键的基本用法。"
+category: "Linux"
+post_type: "article"
+pinned: false
+published: true
 tags:
-  - Linux
-  - Tmux
+  - "Tmux"
+  - "终端复用"
+  - "send-keys"
+  - "会话管理"
+  - "命令行"
 ---
 
 ## 在 Tmux 会话窗格中发送命令的方法

backend/migration/src/lib.rs

@@ -21,6 +21,10 @@ mod m20260328_000010_add_paragraph_comments_toggle_to_site_settings;
 mod m20260328_000011_add_post_images_and_music_playlist;
 mod m20260329_000012_add_link_url_to_reviews;
 mod m20260329_000013_add_ai_provider_presets_to_site_settings;
+mod m20260329_000014_create_query_events;
+mod m20260330_000015_add_image_ai_settings_to_site_settings;
+mod m20260330_000016_add_r2_media_settings_to_site_settings;
+mod m20260330_000017_add_media_storage_provider_to_site_settings;
 pub struct Migrator;
 
 #[async_trait::async_trait]
@@ -46,6 +50,10 @@ impl MigratorTrait for Migrator {
             Box::new(m20260328_000011_add_post_images_and_music_playlist::Migration),
             Box::new(m20260329_000012_add_link_url_to_reviews::Migration),
             Box::new(m20260329_000013_add_ai_provider_presets_to_site_settings::Migration),
+            Box::new(m20260329_000014_create_query_events::Migration),
+            Box::new(m20260330_000015_add_image_ai_settings_to_site_settings::Migration),
+            Box::new(m20260330_000016_add_r2_media_settings_to_site_settings::Migration),
+            Box::new(m20260330_000017_add_media_storage_provider_to_site_settings::Migration),
             // inject-above (do not remove this comment)
         ]
     }

backend/migration/src/m20260329_000014_create_query_events.rs

@@ -0,0 +1,73 @@
+use loco_rs::schema::*;
+use sea_orm_migration::prelude::*;
+
+#[derive(DeriveMigrationName)]
+pub struct Migration;
+
+#[async_trait::async_trait]
+impl MigrationTrait for Migration {
+    async fn up(&self, manager: &SchemaManager) -> Result<(), DbErr> {
+        create_table(
+            manager,
+            "query_events",
+            &[
+                ("id", ColType::PkAuto),
+                ("event_type", ColType::String),
+                ("query_text", ColType::Text),
+                ("normalized_query", ColType::Text),
+                ("request_path", ColType::StringNull),
+                ("referrer", ColType::StringNull),
+                ("user_agent", ColType::TextNull),
+                ("result_count", ColType::IntegerNull),
+                ("success", ColType::BooleanNull),
+                ("response_mode", ColType::StringNull),
+                ("provider", ColType::StringNull),
+                ("chat_model", ColType::StringNull),
+                ("latency_ms", ColType::IntegerNull),
+            ],
+            &[],
+        )
+        .await?;
+
+        manager
+            .create_index(
+                Index::create()
+                    .name("idx_query_events_event_type_created_at")
+                    .table(Alias::new("query_events"))
+                    .col(Alias::new("event_type"))
+                    .col(Alias::new("created_at"))
+                    .to_owned(),
+            )
+            .await?;
+
+        manager
+            .create_index(
+                Index::create()
+                    .name("idx_query_events_normalized_query")
+                    .table(Alias::new("query_events"))
+                    .col(Alias::new("normalized_query"))
+                    .to_owned(),
+            )
+            .await?;
+
+        Ok(())
+    }
+
+    async fn down(&self, manager: &SchemaManager) -> Result<(), DbErr> {
+        for index_name in [
+            "idx_query_events_normalized_query",
+            "idx_query_events_event_type_created_at",
+        ] {
+            manager
+                .drop_index(
+                    Index::drop()
+                        .name(index_name)
+                        .table(Alias::new("query_events"))
+                        .to_owned(),
+                )
+                .await?;
+        }
+
+        drop_table(manager, "query_events").await
+    }
+}

backend/migration/src/m20260330_000015_add_image_ai_settings_to_site_settings.rs

@@ -0,0 +1,101 @@
+use sea_orm_migration::prelude::*;
+
+#[derive(DeriveMigrationName)]
+pub struct Migration;
+
+#[async_trait::async_trait]
+impl MigrationTrait for Migration {
+    async fn up(&self, manager: &SchemaManager) -> Result<(), DbErr> {
+        let table = Alias::new("site_settings");
+
+        if !manager
+            .has_column("site_settings", "ai_image_provider")
+            .await?
+        {
+            manager
+                .alter_table(
+                    Table::alter()
+                        .table(table.clone())
+                        .add_column(
+                            ColumnDef::new(Alias::new("ai_image_provider"))
+                                .string()
+                                .null(),
+                        )
+                        .to_owned(),
+                )
+                .await?;
+        }
+
+        if !manager
+            .has_column("site_settings", "ai_image_api_base")
+            .await?
+        {
+            manager
+                .alter_table(
+                    Table::alter()
+                        .table(table.clone())
+                        .add_column(
+                            ColumnDef::new(Alias::new("ai_image_api_base"))
+                                .string()
+                                .null(),
+                        )
+                        .to_owned(),
+                )
+                .await?;
+        }
+
+        if !manager
+            .has_column("site_settings", "ai_image_api_key")
+            .await?
+        {
+            manager
+                .alter_table(
+                    Table::alter()
+                        .table(table.clone())
+                        .add_column(ColumnDef::new(Alias::new("ai_image_api_key")).text().null())
+                        .to_owned(),
+                )
+                .await?;
+        }
+
+        if !manager
+            .has_column("site_settings", "ai_image_model")
+            .await?
+        {
+            manager
+                .alter_table(
+                    Table::alter()
+                        .table(table)
+                        .add_column(ColumnDef::new(Alias::new("ai_image_model")).string().null())
+                        .to_owned(),
+                )
+                .await?;
+        }
+
+        Ok(())
+    }
+
+    async fn down(&self, manager: &SchemaManager) -> Result<(), DbErr> {
+        let table = Alias::new("site_settings");
+
+        for column in [
+            "ai_image_model",
+            "ai_image_api_key",
+            "ai_image_api_base",
+            "ai_image_provider",
+        ] {
+            if manager.has_column("site_settings", column).await? {
+                manager
+                    .alter_table(
+                        Table::alter()
+                            .table(table.clone())
+                            .drop_column(Alias::new(column))
+                            .to_owned(),
+                    )
+                    .await?;
+            }
+        }
+
+        Ok(())
+    }
+}

backend/migration/src/m20260330_000016_add_r2_media_settings_to_site_settings.rs

@@ -0,0 +1,128 @@
+use sea_orm_migration::prelude::*;
+
+#[derive(DeriveMigrationName)]
+pub struct Migration;
+
+#[async_trait::async_trait]
+impl MigrationTrait for Migration {
+    async fn up(&self, manager: &SchemaManager) -> Result<(), DbErr> {
+        let table = Alias::new("site_settings");
+
+        if !manager
+            .has_column("site_settings", "media_r2_account_id")
+            .await?
+        {
+            manager
+                .alter_table(
+                    Table::alter()
+                        .table(table.clone())
+                        .add_column(
+                            ColumnDef::new(Alias::new("media_r2_account_id"))
+                                .string()
+                                .null(),
+                        )
+                        .to_owned(),
+                )
+                .await?;
+        }
+
+        if !manager
+            .has_column("site_settings", "media_r2_bucket")
+            .await?
+        {
+            manager
+                .alter_table(
+                    Table::alter()
+                        .table(table.clone())
+                        .add_column(
+                            ColumnDef::new(Alias::new("media_r2_bucket"))
+                                .string()
+                                .null(),
+                        )
+                        .to_owned(),
+                )
+                .await?;
+        }
+
+        if !manager
+            .has_column("site_settings", "media_r2_public_base_url")
+            .await?
+        {
+            manager
+                .alter_table(
+                    Table::alter()
+                        .table(table.clone())
+                        .add_column(
+                            ColumnDef::new(Alias::new("media_r2_public_base_url"))
+                                .string()
+                                .null(),
+                        )
+                        .to_owned(),
+                )
+                .await?;
+        }
+
+        if !manager
+            .has_column("site_settings", "media_r2_access_key_id")
+            .await?
+        {
+            manager
+                .alter_table(
+                    Table::alter()
+                        .table(table.clone())
+                        .add_column(
+                            ColumnDef::new(Alias::new("media_r2_access_key_id"))
+                                .string()
+                                .null(),
+                        )
+                        .to_owned(),
+                )
+                .await?;
+        }
+
+        if !manager
+            .has_column("site_settings", "media_r2_secret_access_key")
+            .await?
+        {
+            manager
+                .alter_table(
+                    Table::alter()
+                        .table(table)
+                        .add_column(
+                            ColumnDef::new(Alias::new("media_r2_secret_access_key"))
+                                .text()
+                                .null(),
+                        )
+                        .to_owned(),
+                )
+                .await?;
+        }
+
+        Ok(())
+    }
+
+    async fn down(&self, manager: &SchemaManager) -> Result<(), DbErr> {
+        let table = Alias::new("site_settings");
+
+        for column in [
+            "media_r2_secret_access_key",
+            "media_r2_access_key_id",
+            "media_r2_public_base_url",
+            "media_r2_bucket",
+            "media_r2_account_id",
+        ] {
+            if manager.has_column("site_settings", column).await? {
+                manager
+                    .alter_table(
+                        Table::alter()
+                            .table(table.clone())
+                            .drop_column(Alias::new(column))
+                            .to_owned(),
+                    )
+                    .await?;
+            }
+        }
+
+        Ok(())
+    }
+}

backend/migration/src/m20260330_000017_add_media_storage_provider_to_site_settings.rs

@@ -0,0 +1,53 @@
+use sea_orm_migration::prelude::*;
+
+#[derive(DeriveMigrationName)]
+pub struct Migration;
+
+#[async_trait::async_trait]
+impl MigrationTrait for Migration {
+    async fn up(&self, manager: &SchemaManager) -> Result<(), DbErr> {
+        if manager
+            .has_column("site_settings", "media_storage_provider")
+            .await?
+        {
+            return Ok(());
+        }
+
+        manager
+            .alter_table(
+                Table::alter()
+                    .table(SiteSettings::Table)
+                    .add_column(
+                        ColumnDef::new(SiteSettings::MediaStorageProvider)
+                            .string()
+                            .null(),
+                    )
+                    .to_owned(),
+            )
+            .await
+    }
+
+    async fn down(&self, manager: &SchemaManager) -> Result<(), DbErr> {
+        if !manager
+            .has_column("site_settings", "media_storage_provider")
+            .await?
+        {
+            return Ok(());
+        }
+
+        manager
+            .alter_table(
+                Table::alter()
+                    .table(SiteSettings::Table)
+                    .drop_column(SiteSettings::MediaStorageProvider)
+                    .to_owned(),
+            )
+            .await
+    }
+}
+
+#[derive(DeriveIden)]
+enum SiteSettings {
+    Table,
+    MediaStorageProvider,
+}

backend/src/controllers/admin_api.rs

@@ -1,3 +1,4 @@
+use axum::extract::{Multipart, Query};
 use loco_rs::prelude::*;
 use sea_orm::{
     ActiveModelTrait, ColumnTrait, EntityTrait, IntoActiveModel, PaginatorTrait, QueryFilter,
@@ -14,7 +15,7 @@ use crate::{
         site_settings::{self, SiteSettingsPayload},
     },
     models::_entities::{ai_chunks, comments, friend_links, posts, reviews},
-    services::{ai, content},
+    services::{ai, analytics, content, storage},
 };
 
 #[derive(Clone, Debug, Deserialize)]
@@ -130,6 +131,10 @@ pub struct AdminSiteSettingsResponse {
     pub ai_api_base: Option<String>,
     pub ai_api_key: Option<String>,
     pub ai_chat_model: Option<String>,
+    pub ai_image_provider: Option<String>,
+    pub ai_image_api_base: Option<String>,
+    pub ai_image_api_key: Option<String>,
+    pub ai_image_model: Option<String>,
     pub ai_providers: Vec<site_settings::AiProviderConfig>,
     pub ai_active_provider_id: Option<String>,
     pub ai_embedding_model: Option<String>,
@@ -139,6 +144,12 @@ pub struct AdminSiteSettingsResponse {
     pub ai_last_indexed_at: Option<String>,
     pub ai_chunks_count: u64,
     pub ai_local_embedding: String,
+    pub media_storage_provider: Option<String>,
+    pub media_r2_account_id: Option<String>,
+    pub media_r2_bucket: Option<String>,
+    pub media_r2_public_base_url: Option<String>,
+    pub media_r2_access_key_id: Option<String>,
+    pub media_r2_secret_access_key: Option<String>,
 }
 
 #[derive(Clone, Debug, Serialize)]
@@ -160,6 +171,67 @@ pub struct AdminAiProviderTestResponse {
     pub reply_preview: String,
 }
 
+#[derive(Clone, Debug, Deserialize)]
+pub struct AdminAiImageProviderTestRequest {
+    pub provider: String,
+    pub api_base: String,
+    pub api_key: String,
+    pub image_model: String,
+}
+
+#[derive(Clone, Debug, Serialize)]
+pub struct AdminAiImageProviderTestResponse {
+    pub provider: String,
+    pub endpoint: String,
+    pub image_model: String,
+    pub result_preview: String,
+}
+
+#[derive(Clone, Debug, Serialize)]
+pub struct AdminImageUploadResponse {
+    pub url: String,
+    pub key: String,
+}
+
+#[derive(Clone, Debug, Serialize)]
+pub struct AdminR2ConnectivityResponse {
+    pub bucket: String,
+    pub public_base_url: String,
+}
+
+#[derive(Clone, Debug, Serialize)]
+pub struct AdminMediaObjectResponse {
+    pub key: String,
+    pub url: String,
+    pub size_bytes: i64,
+    pub last_modified: Option<String>,
+}
+
+#[derive(Clone, Debug, Serialize)]
+pub struct AdminMediaListResponse {
+    pub provider: String,
+    pub bucket: String,
+    pub public_base_url: String,
+    pub items: Vec<AdminMediaObjectResponse>,
+}
+
+#[derive(Clone, Debug, Serialize)]
+pub struct AdminMediaDeleteResponse {
+    pub deleted: bool,
+    pub key: String,
+}
+
+#[derive(Clone, Debug, Deserialize)]
+pub struct AdminMediaListQuery {
+    pub prefix: Option<String>,
+    pub limit: Option<i32>,
+}
+
+#[derive(Clone, Debug, Deserialize)]
+pub struct AdminMediaDeleteQuery {
+    pub key: String,
+}
+
 #[derive(Clone, Debug, Deserialize)]
 pub struct AdminPostMetadataRequest {
     pub markdown: String,
@@ -170,6 +242,30 @@ pub struct AdminPostPolishRequest {
     pub markdown: String,
 }
 
+#[derive(Clone, Debug, Deserialize)]
+pub struct AdminReviewPolishRequest {
+    pub title: String,
+    pub review_type: String,
+    pub rating: i32,
+    pub review_date: Option<String>,
+    pub status: String,
+    #[serde(default)]
+    pub tags: Vec<String>,
+    pub description: String,
+}
+
+#[derive(Clone, Debug, Deserialize)]
+pub struct AdminPostCoverImageRequest {
+    pub title: String,
+    pub description: Option<String>,
+    pub category: Option<String>,
+    #[serde(default)]
+    pub tags: Vec<String>,
+    pub post_type: String,
+    pub slug: Option<String>,
+    pub markdown: String,
+}
+
 fn format_timestamp(
     value: Option<sea_orm::prelude::DateTimeWithTimeZone>,
     pattern: &str,
@@ -242,6 +338,10 @@ fn build_settings_response(
         ai_api_base: item.ai_api_base,
         ai_api_key: item.ai_api_key,
         ai_chat_model: item.ai_chat_model,
+        ai_image_provider: item.ai_image_provider,
+        ai_image_api_base: item.ai_image_api_base,
+        ai_image_api_key: item.ai_image_api_key,
+        ai_image_model: item.ai_image_model,
         ai_providers,
         ai_active_provider_id,
         ai_embedding_model: item.ai_embedding_model,
@@ -251,6 +351,12 @@ fn build_settings_response(
         ai_last_indexed_at: format_timestamp(item.ai_last_indexed_at, "%Y-%m-%d %H:%M:%S UTC"),
         ai_chunks_count,
         ai_local_embedding: ai::local_embedding_label().to_string(),
+        media_storage_provider: item.media_storage_provider,
+        media_r2_account_id: item.media_r2_account_id,
+        media_r2_bucket: item.media_r2_bucket,
+        media_r2_public_base_url: item.media_r2_public_base_url,
+        media_r2_access_key_id: item.media_r2_access_key_id,
+        media_r2_secret_access_key: item.media_r2_secret_access_key,
     }
 }
 
@@ -410,6 +516,12 @@ pub async fn dashboard(State(ctx): State<AppContext>) -> Result<Response> {
     })
 }
 
+#[debug_handler]
+pub async fn analytics_overview(State(ctx): State<AppContext>) -> Result<Response> {
+    check_auth()?;
+    format::json(analytics::build_admin_analytics(&ctx).await?)
+}
+
 #[debug_handler]
 pub async fn get_site_settings(State(ctx): State<AppContext>) -> Result<Response> {
     check_auth()?;
@@ -428,7 +540,7 @@ pub async fn update_site_settings(
     let current = site_settings::load_current(&ctx).await?;
     let mut item = current;
     params.apply(&mut item);
-    let item = item.into_active_model();
+    let item = item.into_active_model().reset_all();
     let updated = item.update(&ctx.db).await?;
     let ai_chunks_count = ai_chunks::Entity::find().count(&ctx.db).await?;
 
@@ -469,6 +581,88 @@ pub async fn test_ai_provider(Json(payload): Json<AdminAiProviderTestRequest>) -
     })
 }
 
+#[debug_handler]
+pub async fn test_ai_image_provider(
+    Json(payload): Json<AdminAiImageProviderTestRequest>,
+) -> Result<Response> {
+    check_auth()?;
+
+    let result = ai::test_image_provider_connectivity(
+        &payload.provider,
+        &payload.api_base,
+        &payload.api_key,
+        &payload.image_model,
+    )
+    .await?;
+
+    format::json(AdminAiImageProviderTestResponse {
+        provider: result.provider,
+        endpoint: result.endpoint,
+        image_model: result.image_model,
+        result_preview: result.result_preview,
+    })
+}
+
+#[debug_handler]
+pub async fn test_r2_storage(State(ctx): State<AppContext>) -> Result<Response> {
+    check_auth()?;
+
+    let settings = storage::require_r2_settings(&ctx).await?;
+    let bucket = storage::test_r2_connectivity(&ctx).await?;
+
+    format::json(AdminR2ConnectivityResponse {
+        bucket,
+        public_base_url: settings.public_base_url,
+    })
+}
+
+#[debug_handler]
+pub async fn list_media_objects(
+    State(ctx): State<AppContext>,
+    Query(query): Query<AdminMediaListQuery>,
+) -> Result<Response> {
+    check_auth()?;
+
+    let settings = storage::require_r2_settings(&ctx).await?;
+    let items = storage::list_objects(&ctx, query.prefix.as_deref(), query.limit.unwrap_or(200))
+        .await?
+        .into_iter()
+        .map(|item| AdminMediaObjectResponse {
+            key: item.key,
+            url: item.url,
+            size_bytes: item.size_bytes,
+            last_modified: item.last_modified,
+        })
+        .collect::<Vec<_>>();
+
+    format::json(AdminMediaListResponse {
+        provider: settings.provider_name,
+        bucket: settings.bucket,
+        public_base_url: settings.public_base_url,
+        items,
+    })
+}
+
+#[debug_handler]
+pub async fn delete_media_object(
+    State(ctx): State<AppContext>,
+    Query(query): Query<AdminMediaDeleteQuery>,
+) -> Result<Response> {
+    check_auth()?;
+
+    let key = query.key.trim();
+    if key.is_empty() {
+        return Err(Error::BadRequest("缺少对象 key".to_string()));
+    }
+
+    storage::delete_object(&ctx, key).await?;
+
+    format::json(AdminMediaDeleteResponse {
+        deleted: true,
+        key: key.to_string(),
+    })
+}
+
 #[debug_handler]
 pub async fn generate_post_metadata(
     State(ctx): State<AppContext>,
@@ -487,6 +681,127 @@ pub async fn polish_post_markdown(
     format::json(ai::polish_post_markdown(&ctx, &payload.markdown).await?)
 }
 
+#[debug_handler]
+pub async fn polish_review_description(
+    State(ctx): State<AppContext>,
+    Json(payload): Json<AdminReviewPolishRequest>,
+) -> Result<Response> {
+    check_auth()?;
+    format::json(
+        ai::polish_review_description(
+            &ctx,
+            &payload.title,
+            &payload.review_type,
+            payload.rating,
+            payload.review_date.as_deref(),
+            &payload.status,
+            &payload.tags,
+            &payload.description,
+        )
+        .await?,
+    )
+}
+
+#[debug_handler]
+pub async fn generate_post_cover_image(
+    State(ctx): State<AppContext>,
+    Json(payload): Json<AdminPostCoverImageRequest>,
+) -> Result<Response> {
+    check_auth()?;
+    format::json(
+        ai::generate_post_cover_image(
+            &ctx,
+            &payload.title,
+            payload.description.as_deref(),
+            payload.category.as_deref(),
+            &payload.tags,
+            &payload.post_type,
+            payload.slug.as_deref(),
+            &payload.markdown,
+        )
+        .await?,
+    )
+}
+
+fn review_cover_extension(
+    file_name: Option<&str>,
+    content_type: Option<&str>,
+) -> Option<&'static str> {
+    let from_file_name = file_name
+        .and_then(|name| name.rsplit('.').next())
+        .map(|ext| ext.trim().to_ascii_lowercase());
+
+    match from_file_name.as_deref() {
+        Some("png") => return Some("png"),
+        Some("jpg") | Some("jpeg") => return Some("jpg"),
+        Some("webp") => return Some("webp"),
+        Some("gif") => return Some("gif"),
+        Some("avif") => return Some("avif"),
+        Some("svg") => return Some("svg"),
+        _ => {}
+    }
+
+    match content_type
+        .unwrap_or_default()
+        .trim()
+        .to_ascii_lowercase()
+        .as_str()
+    {
+        "image/png" => Some("png"),
+        "image/jpeg" => Some("jpg"),
+        "image/webp" => Some("webp"),
+        "image/gif" => Some("gif"),
+        "image/avif" => Some("avif"),
+        "image/svg+xml" => Some("svg"),
+        _ => None,
+    }
+}
+
+#[debug_handler]
+pub async fn upload_review_cover_image(
+    State(ctx): State<AppContext>,
+    mut multipart: Multipart,
+) -> Result<Response> {
+    check_auth()?;
+
+    let field = multipart
+        .next_field()
+        .await
+        .map_err(|error| Error::BadRequest(error.to_string()))?
+        .ok_or_else(|| Error::BadRequest("请先选择图片文件".to_string()))?;
+    let file_name = field.file_name().map(ToString::to_string);
+    let content_type = field.content_type().map(ToString::to_string);
+    let extension = review_cover_extension(file_name.as_deref(), content_type.as_deref())
+        .ok_or_else(|| Error::BadRequest("仅支持常见图片格式上传".to_string()))?;
+    let bytes = field
+        .bytes()
+        .await
+        .map_err(|error| Error::BadRequest(error.to_string()))?;
+
+    if bytes.is_empty() {
+        return Err(Error::BadRequest("上传的图片内容为空".to_string()));
+    }
+
+    let key = crate::services::storage::build_object_key(
+        "review-covers",
+        file_name.as_deref().unwrap_or("review-cover"),
+        extension,
+    );
+    let stored = crate::services::storage::upload_bytes_to_r2(
+        &ctx,
+        &key,
+        bytes.to_vec(),
+        content_type.as_deref(),
+        Some("public, max-age=31536000, immutable"),
+    )
+    .await?;
+
+    format::json(AdminImageUploadResponse {
+        url: stored.url,
+        key: stored.key,
+    })
+}
+
 pub fn routes() -> Routes {
     Routes::new()
         .prefix("/api/admin")
@@ -494,11 +809,21 @@ pub fn routes() -> Routes {
         .add("/session", delete(session_logout))
         .add("/session/login", post(session_login))
         .add("/dashboard", get(dashboard))
+        .add("/analytics", get(analytics_overview))
         .add("/site-settings", get(get_site_settings))
         .add("/site-settings", patch(update_site_settings))
         .add("/site-settings", put(update_site_settings))
         .add("/ai/reindex", post(reindex_ai))
         .add("/ai/test-provider", post(test_ai_provider))
+        .add("/ai/test-image-provider", post(test_ai_image_provider))
+        .add("/storage/r2/test", post(test_r2_storage))
+        .add(
+            "/storage/media",
+            get(list_media_objects).delete(delete_media_object),
+        )
         .add("/ai/post-metadata", post(generate_post_metadata))
         .add("/ai/polish-post", post(polish_post_markdown))
+        .add("/ai/polish-review", post(polish_review_description))
+        .add("/ai/post-cover", post(generate_post_cover_image))
+        .add("/storage/review-cover", post(upload_review_cover_image))
 }

backend/src/controllers/ai.rs

@@ -5,15 +5,19 @@ use axum::{
     body::{Body, Bytes},
     http::{
         header::{CACHE_CONTROL, CONNECTION, CONTENT_TYPE},
-        HeaderValue,
+        HeaderMap, HeaderValue,
     },
 };
 use chrono::{DateTime, Utc};
 use loco_rs::prelude::*;
 use serde::{Deserialize, Serialize};
 use serde_json::Value;
+use std::time::Instant;
 
-use crate::{controllers::admin::check_auth, services::ai};
+use crate::{
+    controllers::{admin::check_auth, site_settings},
+    services::{ai, analytics},
+};
 
 #[derive(Clone, Debug, Deserialize)]
 pub struct AskPayload {
@@ -55,6 +59,30 @@ fn format_timestamp(value: Option<DateTime<Utc>>) -> Option<String> {
     value.map(|item| item.to_rfc3339())
 }
 
+fn trim_to_option(value: Option<String>) -> Option<String> {
+    value.and_then(|item| {
+        let trimmed = item.trim().to_string();
+        if trimmed.is_empty() {
+            None
+        } else {
+            Some(trimmed)
+        }
+    })
+}
+
+async fn current_provider_metadata(ctx: &AppContext) -> (Option<String>, Option<String>) {
+    match site_settings::load_current(ctx).await {
+        Ok(settings) => (
+            trim_to_option(settings.ai_provider),
+            trim_to_option(settings.ai_chat_model),
+        ),
+        Err(error) => {
+            tracing::warn!("failed to load ai provider metadata for analytics: {error}");
+            (None, None)
+        }
+    }
+}
+
 fn sse_bytes<T: Serialize>(event: &str, payload: &T) -> Bytes {
     let data = serde_json::to_string(payload)
         .unwrap_or_else(|_| "{\"message\":\"failed to serialize SSE payload\"}".to_string());
@@ -178,24 +206,66 @@ fn build_ask_response(prepared: &ai::PreparedAiAnswer, answer: String) -> AskRes
 #[debug_handler]
 pub async fn ask(
     State(ctx): State<AppContext>,
+    headers: HeaderMap,
     Json(payload): Json<AskPayload>,
 ) -> Result<Response> {
-    let result = ai::answer_question(&ctx, &payload.question).await?;
-    format::json(AskResponse {
-        question: payload.question.trim().to_string(),
-        answer: result.answer,
-        sources: result.sources,
-        indexed_chunks: result.indexed_chunks,
-        last_indexed_at: format_timestamp(result.last_indexed_at),
-    })
+    let started_at = Instant::now();
+    let question = payload.question.trim().to_string();
+    let (provider, chat_model) = current_provider_metadata(&ctx).await;
+
+    match ai::answer_question(&ctx, &payload.question).await {
+        Ok(result) => {
+            analytics::record_ai_question_event(
+                &ctx,
+                &question,
+                &headers,
+                true,
+                "sync",
+                provider,
+                chat_model,
+                Some(result.sources.len()),
+                started_at.elapsed().as_millis() as i64,
+            )
+            .await;
+
+            format::json(AskResponse {
+                question,
+                answer: result.answer,
+                sources: result.sources,
+                indexed_chunks: result.indexed_chunks,
+                last_indexed_at: format_timestamp(result.last_indexed_at),
+            })
+        }
+        Err(error) => {
+            analytics::record_ai_question_event(
+                &ctx,
+                &question,
+                &headers,
+                false,
+                "sync",
+                provider,
+                chat_model,
+                None,
+                started_at.elapsed().as_millis() as i64,
+            )
+            .await;
+            Err(error)
+        }
+    }
 }
 
 #[debug_handler]
 pub async fn ask_stream(
     State(ctx): State<AppContext>,
+    headers: HeaderMap,
     Json(payload): Json<AskPayload>,
 ) -> Result<Response> {
+    let request_headers = headers.clone();
+    let question = payload.question.trim().to_string();
+    let (fallback_provider, fallback_chat_model) = current_provider_metadata(&ctx).await;
+
     let stream = stream! {
+        let started_at = Instant::now();
         yield Ok::<Bytes, std::io::Error>(sse_bytes("status", &StreamStatusEvent {
             phase: "retrieving".to_string(),
             message: "正在检索知识库上下文...".to_string(),
@@ -204,6 +274,18 @@ pub async fn ask_stream(
         let prepared = match ai::prepare_answer(&ctx, &payload.question).await {
             Ok(prepared) => prepared,
             Err(error) => {
+                analytics::record_ai_question_event(
+                    &ctx,
+                    &question,
+                    &request_headers,
+                    false,
+                    "stream",
+                    fallback_provider.clone(),
+                    fallback_chat_model.clone(),
+                    None,
+                    started_at.elapsed().as_millis() as i64,
+                )
+                .await;
                 yield Ok(sse_bytes("error", &StreamErrorEvent {
                     message: error.to_string(),
                 }));
@@ -212,6 +294,16 @@ pub async fn ask_stream(
         };
 
         let mut accumulated_answer = String::new();
+        let active_provider = prepared
+            .provider_request
+            .as_ref()
+            .map(|request| request.provider.clone())
+            .or_else(|| fallback_provider.clone());
+        let active_chat_model = prepared
+            .provider_request
+            .as_ref()
+            .map(|request| request.chat_model.clone())
+            .or_else(|| fallback_chat_model.clone());
 
         if let Some(answer) = prepared.immediate_answer.as_deref() {
             yield Ok(sse_bytes("status", &StreamStatusEvent {
@@ -241,6 +333,18 @@ pub async fn ask_stream(
             let mut response = match response {
                 Ok(response) => response,
                 Err(error) => {
+                    analytics::record_ai_question_event(
+                        &ctx,
+                        &question,
+                        &request_headers,
+                        false,
+                        "stream",
+                        active_provider.clone(),
+                        active_chat_model.clone(),
+                        Some(prepared.sources.len()),
+                        started_at.elapsed().as_millis() as i64,
+                    )
+                    .await;
                     yield Ok(sse_bytes("error", &StreamErrorEvent {
                         message: format!("AI request failed: {error}"),
                     }));
@@ -251,6 +355,18 @@ pub async fn ask_stream(
             if !response.status().is_success() {
                 let status = response.status();
                 let body = response.text().await.unwrap_or_default();
+                analytics::record_ai_question_event(
+                    &ctx,
+                    &question,
+                    &request_headers,
+                    false,
+                    "stream",
+                    active_provider.clone(),
+                    active_chat_model.clone(),
+                    Some(prepared.sources.len()),
+                    started_at.elapsed().as_millis() as i64,
+                )
+                .await;
                 yield Ok(sse_bytes("error", &StreamErrorEvent {
                     message: format!("AI provider returned {status}: {body}"),
                 }));
@@ -265,6 +381,18 @@ pub async fn ask_stream(
                 let Some(chunk) = (match next_chunk {
                     Ok(chunk) => chunk,
                     Err(error) => {
+                        analytics::record_ai_question_event(
+                            &ctx,
+                            &question,
+                            &request_headers,
+                            false,
+                            "stream",
+                            active_provider.clone(),
+                            active_chat_model.clone(),
+                            Some(prepared.sources.len()),
+                            started_at.elapsed().as_millis() as i64,
+                        )
+                        .await;
                         yield Ok(sse_bytes("error", &StreamErrorEvent {
                             message: format!("AI stream read failed: {error}"),
                         }));
@@ -323,6 +451,18 @@ pub async fn ask_stream(
             }
 
             if accumulated_answer.is_empty() {
+                analytics::record_ai_question_event(
+                    &ctx,
+                    &question,
+                    &request_headers,
+                    false,
+                    "stream",
+                    active_provider.clone(),
+                    active_chat_model.clone(),
+                    Some(prepared.sources.len()),
+                    started_at.elapsed().as_millis() as i64,
+                )
+                .await;
                 yield Ok(sse_bytes("error", &StreamErrorEvent {
                     message: "AI chat response did not contain readable content".to_string(),
                 }));
@@ -330,6 +470,19 @@ pub async fn ask_stream(
             }
         }
 
+        analytics::record_ai_question_event(
+            &ctx,
+            &question,
+            &request_headers,
+            true,
+            "stream",
+            active_provider,
+            active_chat_model,
+            Some(prepared.sources.len()),
+            started_at.elapsed().as_millis() as i64,
+        )
+        .await;
+
         let final_payload = build_ask_response(&prepared, accumulated_answer);
         yield Ok(sse_bytes("complete", &final_payload));
     };

backend/src/controllers/review.rs

@@ -3,7 +3,10 @@ use loco_rs::prelude::*;
 use sea_orm::{EntityTrait, QueryOrder, Set};
 use serde::{Deserialize, Serialize};
 
-use crate::models::_entities::reviews::{self, Entity as ReviewEntity};
+use crate::{
+    models::_entities::reviews::{self, Entity as ReviewEntity},
+    services::storage,
+};
 
 #[derive(Serialize, Deserialize, Debug)]
 pub struct CreateReviewRequest {
@@ -83,9 +86,11 @@ pub async fn update(
 ) -> Result<impl IntoResponse> {
     let review = ReviewEntity::find_by_id(id).one(&ctx.db).await?;
 
-    let Some(mut review) = review.map(|r| r.into_active_model()) else {
+    let Some(existing_review) = review else {
         return Err(Error::NotFound);
     };
+    let old_cover = existing_review.cover.clone();
+    let mut review = existing_review.into_active_model();
 
     if let Some(title) = req.title {
         review.title = Set(Some(title));
@@ -108,7 +113,9 @@ pub async fn update(
     if let Some(tags) = req.tags {
         review.tags = Set(Some(serde_json::to_string(&tags).unwrap_or_default()));
     }
+    let mut next_cover = old_cover.clone();
     if let Some(cover) = req.cover {
+        next_cover = Some(cover.clone());
         review.cover = Set(Some(cover));
     }
     if let Some(link_url) = req.link_url {
@@ -117,6 +124,14 @@ pub async fn update(
     }
 
     let review = review.update(&ctx.db).await?;
+    if let Some(old_cover) = old_cover
+        .filter(|old| Some(old.clone()) != next_cover)
+        .filter(|old| !old.trim().is_empty())
+    {
+        if let Err(error) = storage::delete_managed_url(&ctx, &old_cover).await {
+            tracing::warn!("failed to cleanup replaced review cover: {error}");
+        }
+    }
     format::json(review)
 }
 
@@ -128,7 +143,13 @@ pub async fn remove(
 
     match review {
         Some(r) => {
+            let cover = r.cover.clone();
             r.delete(&ctx.db).await?;
+            if let Some(cover) = cover.filter(|value| !value.trim().is_empty()) {
+                if let Err(error) = storage::delete_managed_url(&ctx, &cover).await {
+                    tracing::warn!("failed to cleanup deleted review cover: {error}");
+                }
+            }
             format::empty()
         }
         None => Err(Error::NotFound),

backend/src/controllers/search.rs

@@ -1,15 +1,46 @@
+use axum::http::HeaderMap;
 use loco_rs::prelude::*;
 use sea_orm::{ConnectionTrait, DatabaseBackend, DbBackend, FromQueryResult, Statement};
-use serde::{Deserialize, Serialize};
+use serde::{Deserialize, Deserializer, Serialize};
 use serde_json::Value;
+use std::time::Instant;
 
 use crate::models::_entities::posts;
-use crate::services::content;
+use crate::services::{analytics, content};
+
+fn deserialize_boolish_option<'de, D>(
+    deserializer: D,
+) -> std::result::Result<Option<bool>, D::Error>
+where
+    D: Deserializer<'de>,
+{
+    let raw = Option::<String>::deserialize(deserializer)?;
+
+    raw.map(|value| match value.trim().to_ascii_lowercase().as_str() {
+        "1" | "true" | "yes" | "on" => Ok(true),
+        "0" | "false" | "no" | "off" => Ok(false),
+        other => Err(serde::de::Error::custom(format!(
+            "invalid boolean value `{other}`"
+        ))),
+    })
+    .transpose()
+}
+
+fn is_preview_search(query: &SearchQuery, headers: &HeaderMap) -> bool {
+    query.preview.unwrap_or(false)
+        || headers
+            .get("x-termi-search-mode")
+            .and_then(|value| value.to_str().ok())
+            .map(|value| value.eq_ignore_ascii_case("preview"))
+            .unwrap_or(false)
+}
 
 #[derive(Clone, Debug, Default, Deserialize)]
 pub struct SearchQuery {
     pub q: Option<String>,
     pub limit: Option<u64>,
+    #[serde(default, deserialize_with = "deserialize_boolish_option")]
+    pub preview: Option<bool>,
 }
 
 #[derive(Clone, Debug, Serialize, FromQueryResult)]
@@ -157,7 +188,10 @@ async fn fallback_search(ctx: &AppContext, q: &str, limit: u64) -> Result<Vec<Se
 pub async fn search(
     Query(query): Query<SearchQuery>,
     State(ctx): State<AppContext>,
+    headers: HeaderMap,
 ) -> Result<Response> {
+    let started_at = Instant::now();
+    let preview_search = is_preview_search(&query, &headers);
     content::sync_markdown_posts(&ctx).await?;
 
     let q = query.q.unwrap_or_default().trim().to_string();
@@ -186,6 +220,17 @@ pub async fn search(
         fallback_search(&ctx, &q, limit).await?
     };
 
+    if !preview_search {
+        analytics::record_search_event(
+            &ctx,
+            &q,
+            results.len(),
+            &headers,
+            started_at.elapsed().as_millis() as i64,
+        )
+        .await;
+    }
+
     format::json(results)
 }
 

backend/src/controllers/site_settings.rs

@@ -44,6 +44,8 @@ pub struct AiProviderConfig {
     pub api_key: Option<String>,
     #[serde(default, alias = "chatModel")]
     pub chat_model: Option<String>,
+    #[serde(default, alias = "imageModel")]
+    pub image_model: Option<String>,
 }
 
 #[derive(Clone, Debug, Default, Deserialize, Serialize)]
@@ -94,6 +96,14 @@ pub struct SiteSettingsPayload {
     pub ai_api_key: Option<String>,
     #[serde(default, alias = "aiChatModel")]
     pub ai_chat_model: Option<String>,
+    #[serde(default, alias = "aiImageProvider")]
+    pub ai_image_provider: Option<String>,
+    #[serde(default, alias = "aiImageApiBase")]
+    pub ai_image_api_base: Option<String>,
+    #[serde(default, alias = "aiImageApiKey")]
+    pub ai_image_api_key: Option<String>,
+    #[serde(default, alias = "aiImageModel")]
+    pub ai_image_model: Option<String>,
     #[serde(default, alias = "aiProviders")]
     pub ai_providers: Option<Vec<AiProviderConfig>>,
     #[serde(default, alias = "aiActiveProviderId")]
@@ -106,6 +116,18 @@ pub struct SiteSettingsPayload {
     pub ai_top_k: Option<i32>,
     #[serde(default, alias = "aiChunkSize")]
     pub ai_chunk_size: Option<i32>,
+    #[serde(default, alias = "mediaR2AccountId")]
+    pub media_r2_account_id: Option<String>,
+    #[serde(default, alias = "mediaStorageProvider")]
+    pub media_storage_provider: Option<String>,
+    #[serde(default, alias = "mediaR2Bucket")]
+    pub media_r2_bucket: Option<String>,
+    #[serde(default, alias = "mediaR2PublicBaseUrl")]
+    pub media_r2_public_base_url: Option<String>,
+    #[serde(default, alias = "mediaR2AccessKeyId")]
+    pub media_r2_access_key_id: Option<String>,
+    #[serde(default, alias = "mediaR2SecretAccessKey")]
+    pub media_r2_secret_access_key: Option<String>,
 }
 
 #[derive(Clone, Debug, Serialize)]
@@ -152,13 +174,16 @@ fn create_ai_provider_id() -> String {
 }
 
 fn default_ai_provider_config() -> AiProviderConfig {
+    let provider = ai::provider_name(None);
+
     AiProviderConfig {
         id: "default".to_string(),
         name: "默认提供商".to_string(),
-        provider: ai::provider_name(None),
+        provider: provider.clone(),
         api_base: Some(ai::default_api_base().to_string()),
         api_key: Some(ai::default_api_key().to_string()),
         chat_model: Some(ai::default_chat_model().to_string()),
+        image_model: Some(ai::default_image_model_for_provider(&provider).to_string()),
     }
 }
 
@@ -174,11 +199,13 @@ fn normalize_ai_provider_configs(items: Vec<AiProviderConfig>) -> Vec<AiProvider
             let api_base = normalize_optional_string(item.api_base);
             let api_key = normalize_optional_string(item.api_key);
             let chat_model = normalize_optional_string(item.chat_model);
+            let image_model = normalize_optional_string(item.image_model);
             let has_content = !item.name.trim().is_empty()
                 || !provider.trim().is_empty()
                 || api_base.is_some()
                 || api_key.is_some()
-                || chat_model.is_some();
+                || chat_model.is_some()
+                || image_model.is_some();
 
             if !has_content {
                 return None;
@@ -201,6 +228,7 @@ fn normalize_ai_provider_configs(items: Vec<AiProviderConfig>) -> Vec<AiProvider
                 api_base,
                 api_key,
                 chat_model,
+                image_model,
             })
         })
         .collect()
@@ -216,13 +244,16 @@ fn legacy_ai_provider_config(model: &Model) -> Option<AiProviderConfig> {
         return None;
     }
 
+    let normalized_provider = provider.unwrap_or_else(|| ai::provider_name(None));
+
     Some(AiProviderConfig {
         id: "default".to_string(),
         name: "当前提供商".to_string(),
-        provider: provider.unwrap_or_else(|| ai::provider_name(None)),
+        provider: normalized_provider.clone(),
         api_base,
         api_key,
         chat_model,
+        image_model: Some(ai::default_image_model_for_provider(&normalized_provider).to_string()),
     })
 }
 
@@ -301,6 +332,8 @@ fn update_active_provider_from_legacy_fields(model: &mut Model) {
         config.api_base = api_base;
         config.api_key = api_key;
         config.chat_model = chat_model;
+        config.image_model =
+            Some(ai::default_image_model_for_provider(&config.provider).to_string());
         write_ai_provider_state(
             model,
             vec![config],
@@ -322,6 +355,10 @@ fn update_active_provider_from_legacy_fields(model: &mut Model) {
                 config.api_base = api_base.clone();
                 config.api_key = api_key.clone();
                 config.chat_model = chat_model.clone();
+                if config.image_model.is_none() {
+                    config.image_model =
+                        Some(ai::default_image_model_for_provider(&config.provider).to_string());
+                }
             }
         }
     }
@@ -425,6 +462,18 @@ impl SiteSettingsPayload {
         if let Some(ai_chat_model) = self.ai_chat_model {
             item.ai_chat_model = normalize_optional_string(Some(ai_chat_model));
         }
+        if let Some(ai_image_provider) = self.ai_image_provider {
+            item.ai_image_provider = normalize_optional_string(Some(ai_image_provider));
+        }
+        if let Some(ai_image_api_base) = self.ai_image_api_base {
+            item.ai_image_api_base = normalize_optional_string(Some(ai_image_api_base));
+        }
+        if let Some(ai_image_api_key) = self.ai_image_api_key {
+            item.ai_image_api_key = normalize_optional_string(Some(ai_image_api_key));
+        }
+        if let Some(ai_image_model) = self.ai_image_model {
+            item.ai_image_model = normalize_optional_string(Some(ai_image_model));
+        }
         if let Some(ai_embedding_model) = self.ai_embedding_model {
             item.ai_embedding_model = normalize_optional_string(Some(ai_embedding_model));
         }
@@ -437,6 +486,26 @@ impl SiteSettingsPayload {
         if self.ai_chunk_size.is_some() {
             item.ai_chunk_size = normalize_optional_int(self.ai_chunk_size, 400, 4000);
         }
+        if let Some(media_r2_account_id) = self.media_r2_account_id {
+            item.media_r2_account_id = normalize_optional_string(Some(media_r2_account_id));
+        }
+        if let Some(media_storage_provider) = self.media_storage_provider {
+            item.media_storage_provider = normalize_optional_string(Some(media_storage_provider));
+        }
+        if let Some(media_r2_bucket) = self.media_r2_bucket {
+            item.media_r2_bucket = normalize_optional_string(Some(media_r2_bucket));
+        }
+        if let Some(media_r2_public_base_url) = self.media_r2_public_base_url {
+            item.media_r2_public_base_url =
+                normalize_optional_string(Some(media_r2_public_base_url));
+        }
+        if let Some(media_r2_access_key_id) = self.media_r2_access_key_id {
+            item.media_r2_access_key_id = normalize_optional_string(Some(media_r2_access_key_id));
+        }
+        if let Some(media_r2_secret_access_key) = self.media_r2_secret_access_key {
+            item.media_r2_secret_access_key =
+                normalize_optional_string(Some(media_r2_secret_access_key));
+        }
 
         if provider_list_supplied {
             write_ai_provider_state(
@@ -524,6 +593,10 @@ fn default_payload() -> SiteSettingsPayload {
         ai_api_base: Some(ai::default_api_base().to_string()),
         ai_api_key: Some(ai::default_api_key().to_string()),
         ai_chat_model: Some(ai::default_chat_model().to_string()),
+        ai_image_provider: None,
+        ai_image_api_base: None,
+        ai_image_api_key: None,
+        ai_image_model: None,
         ai_providers: Some(vec![default_ai_provider_config()]),
         ai_active_provider_id: Some("default".to_string()),
         ai_embedding_model: Some(ai::local_embedding_label().to_string()),
@@ -533,6 +606,12 @@ fn default_payload() -> SiteSettingsPayload {
         ),
         ai_top_k: Some(4),
         ai_chunk_size: Some(1200),
+        media_storage_provider: None,
+        media_r2_account_id: None,
+        media_r2_bucket: None,
+        media_r2_public_base_url: None,
+        media_r2_access_key_id: None,
+        media_r2_secret_access_key: None,
     }
 }
 
@@ -553,7 +632,11 @@ pub(crate) async fn load_current(ctx: &AppContext) -> Result<Model> {
     .await?;
     let mut model = inserted;
     default_payload().apply(&mut model);
-    Ok(model.into_active_model().update(&ctx.db).await?)
+    Ok(model
+        .into_active_model()
+        .reset_all()
+        .update(&ctx.db)
+        .await?)
 }
 
 fn public_response(model: Model) -> PublicSiteSettingsResponse {
@@ -596,7 +679,7 @@ pub async fn update(
     let current = load_current(&ctx).await?;
     let mut item = current;
     params.apply(&mut item);
-    let item = item.into_active_model();
+    let item = item.into_active_model().reset_all();
     let updated = item.update(&ctx.db).await?;
     format::json(public_response(updated))
 }

backend/src/models/_entities/mod.rs

@@ -7,6 +7,7 @@ pub mod categories;
 pub mod comments;
 pub mod friend_links;
 pub mod posts;
+pub mod query_events;
 pub mod reviews;
 pub mod site_settings;
 pub mod tags;

backend/src/models/_entities/prelude.rs

@@ -5,6 +5,7 @@ pub use super::categories::Entity as Categories;
 pub use super::comments::Entity as Comments;
 pub use super::friend_links::Entity as FriendLinks;
 pub use super::posts::Entity as Posts;
+pub use super::query_events::Entity as QueryEvents;
 pub use super::reviews::Entity as Reviews;
 pub use super::site_settings::Entity as SiteSettings;
 pub use super::tags::Entity as Tags;

backend/src/models/_entities/query_events.rs

@@ -0,0 +1,33 @@
+//! `SeaORM` Entity, manually maintained
+
+use sea_orm::entity::prelude::*;
+use serde::{Deserialize, Serialize};
+
+#[derive(Clone, Debug, PartialEq, DeriveEntityModel, Serialize, Deserialize)]
+#[sea_orm(table_name = "query_events")]
+pub struct Model {
+    pub created_at: DateTimeWithTimeZone,
+    pub updated_at: DateTimeWithTimeZone,
+    #[sea_orm(primary_key)]
+    pub id: i32,
+    pub event_type: String,
+    #[sea_orm(column_type = "Text")]
+    pub query_text: String,
+    #[sea_orm(column_type = "Text")]
+    pub normalized_query: String,
+    pub request_path: Option<String>,
+    pub referrer: Option<String>,
+    #[sea_orm(column_type = "Text", nullable)]
+    pub user_agent: Option<String>,
+    pub result_count: Option<i32>,
+    pub success: Option<bool>,
+    pub response_mode: Option<String>,
+    pub provider: Option<String>,
+    pub chat_model: Option<String>,
+    pub latency_ms: Option<i32>,
+}
+
+#[derive(Copy, Clone, Debug, EnumIter, DeriveRelation)]
+pub enum Relation {}
+
+impl ActiveModelBehavior for ActiveModel {}

backend/src/models/_entities/site_settings.rs

@@ -37,6 +37,11 @@ pub struct Model {
     #[sea_orm(column_type = "Text", nullable)]
     pub ai_api_key: Option<String>,
     pub ai_chat_model: Option<String>,
+    pub ai_image_provider: Option<String>,
+    pub ai_image_api_base: Option<String>,
+    #[sea_orm(column_type = "Text", nullable)]
+    pub ai_image_api_key: Option<String>,
+    pub ai_image_model: Option<String>,
     #[sea_orm(column_type = "JsonBinary", nullable)]
     pub ai_providers: Option<Json>,
     pub ai_active_provider_id: Option<String>,
@@ -46,6 +51,13 @@ pub struct Model {
     pub ai_top_k: Option<i32>,
     pub ai_chunk_size: Option<i32>,
     pub ai_last_indexed_at: Option<DateTimeWithTimeZone>,
+    pub media_storage_provider: Option<String>,
+    pub media_r2_account_id: Option<String>,
+    pub media_r2_bucket: Option<String>,
+    pub media_r2_public_base_url: Option<String>,
+    pub media_r2_access_key_id: Option<String>,
+    #[sea_orm(column_type = "Text", nullable)]
+    pub media_r2_secret_access_key: Option<String>,
 }
 
 #[derive(Copy, Clone, Debug, EnumIter, DeriveRelation)]

backend/src/services/ai.rs

@@ -4,7 +4,7 @@ use fastembed::{
     InitOptionsUserDefined, Pooling, TextEmbedding, TokenizerFiles, UserDefinedEmbeddingModel,
 };
 use loco_rs::prelude::*;
-use reqwest::{Client, Url};
+use reqwest::{header::CONTENT_TYPE, multipart, Client, Url};
 use sea_orm::{
     ActiveModelTrait, ConnectionTrait, DbBackend, EntityTrait, FromQueryResult, IntoActiveModel,
     PaginatorTrait, QueryOrder, Set, Statement,
@@ -17,11 +17,12 @@ use std::sync::{Mutex, OnceLock};
 use uuid::Uuid;
 
 use crate::{
+    controllers::site_settings as site_settings_controller,
     models::_entities::{ai_chunks, site_settings},
-    services::content,
+    services::{content, storage},
 };
 
-const DEFAULT_AI_PROVIDER: &str = "newapi";
+const DEFAULT_AI_PROVIDER: &str = "openai";
 const DEFAULT_AI_API_BASE: &str = "https://91code.jiangnight.com/v1";
 const DEFAULT_AI_API_KEY: &str =
     "sk-5a5e27db9fb8f8ee7e1d8e3c6a44638c2e50cdb0a0cf9d926fefb5418ff62571";
@@ -29,6 +30,8 @@ const DEFAULT_CHAT_MODEL: &str = "gpt-5.4";
 const DEFAULT_REASONING_EFFORT: &str = "medium";
 const DEFAULT_DISABLE_RESPONSE_STORAGE: bool = true;
 const DEFAULT_IMAGE_MODEL: &str = "gpt-image-1";
+const DEFAULT_CLOUDFLARE_CHAT_MODEL: &str = "@cf/meta/llama-3.1-8b-instruct";
+const DEFAULT_CLOUDFLARE_IMAGE_MODEL: &str = "@cf/black-forest-labs/flux-2-klein-4b";
 const DEFAULT_TOP_K: usize = 4;
 const DEFAULT_CHUNK_SIZE: usize = 1200;
 const DEFAULT_SYSTEM_PROMPT: &str =
@@ -49,6 +52,14 @@ const LOCAL_EMBEDDING_FILES: [&str; 5] = [
 
 static TEXT_EMBEDDING_MODEL: OnceLock<Mutex<TextEmbedding>> = OnceLock::new();
 
+#[derive(Clone, Debug)]
+struct AiImageRuntimeSettings {
+    provider: String,
+    api_base: Option<String>,
+    api_key: Option<String>,
+    image_model: String,
+}
+
 #[derive(Clone, Debug)]
 struct AiRuntimeSettings {
     raw: site_settings::Model,
@@ -56,6 +67,7 @@ struct AiRuntimeSettings {
     api_base: Option<String>,
     api_key: Option<String>,
     chat_model: String,
+    image: AiImageRuntimeSettings,
     system_prompt: String,
     top_k: usize,
     chunk_size: usize,
@@ -121,6 +133,11 @@ pub struct PolishedPostMarkdown {
     pub polished_markdown: String,
 }
 
+#[derive(Clone, Debug, Serialize)]
+pub struct PolishedReviewDescription {
+    pub polished_description: String,
+}
+
 #[derive(Clone, Debug, Serialize)]
 pub struct GeneratedPostCoverImage {
     pub image_url: String,
@@ -135,6 +152,14 @@ pub struct AiProviderConnectivityResult {
     pub reply_preview: String,
 }
 
+#[derive(Clone, Debug, Serialize)]
+pub struct AiImageProviderConnectivityResult {
+    pub provider: String,
+    pub endpoint: String,
+    pub image_model: String,
+    pub result_preview: String,
+}
+
 #[derive(Clone, Debug, Default, Deserialize)]
 struct GeneratedPostMetadataDraft {
     title: Option<String>,
@@ -227,16 +252,57 @@ fn build_endpoint(api_base: &str, path: &str) -> String {
     )
 }
 
+fn provider_uses_cloudflare(provider: &str) -> bool {
+    provider.eq_ignore_ascii_case("cloudflare")
+        || provider.eq_ignore_ascii_case("cloudflare-workers-ai")
+        || provider.eq_ignore_ascii_case("workers-ai")
+}
+
 fn provider_uses_openai_api_prefix(provider: &str) -> bool {
     provider_uses_responses(provider) || provider.eq_ignore_ascii_case("openai-compatible")
 }
 
+fn normalize_cloudflare_api_base(api_base: &str) -> String {
+    let trimmed = api_base.trim().trim_end_matches('/');
+    if trimmed.is_empty() {
+        return String::new();
+    }
+
+    if !trimmed.starts_with("http://") && !trimmed.starts_with("https://") {
+        return format!(
+            "https://api.cloudflare.com/client/v4/accounts/{}",
+            trimmed.trim_matches('/'),
+        );
+    }
+
+    let Ok(mut parsed) = Url::parse(trimmed) else {
+        return trimmed.to_string();
+    };
+
+    let segments = parsed
+        .path_segments()
+        .map(|items| items.collect::<Vec<_>>())
+        .unwrap_or_default();
+
+    if let Some(account_index) = segments.iter().position(|segment| *segment == "accounts") {
+        if let Some(account_id) = segments.get(account_index + 1) {
+            parsed.set_path(&format!("/client/v4/accounts/{account_id}"));
+        }
+    }
+
+    parsed.to_string().trim_end_matches('/').to_string()
+}
+
 fn normalize_provider_api_base(provider: &str, api_base: &str) -> String {
     let trimmed = api_base.trim();
     if trimmed.is_empty() {
         return String::new();
     }
 
+    if provider_uses_cloudflare(provider) {
+        return normalize_cloudflare_api_base(trimmed);
+    }
+
     if !provider_uses_openai_api_prefix(provider) {
         return trimmed.trim_end_matches('/').to_string();
     }
@@ -604,6 +670,19 @@ fn parse_provider_sse_body(body: &str) -> Option<Value> {
     latest_response.or(latest_payload)
 }
 
+fn parse_json_body(body: &str) -> Result<Value> {
+    serde_json::from_str(body)
+        .or_else(|_| {
+            parse_provider_sse_body(body).ok_or_else(|| {
+                serde_json::Error::io(std::io::Error::new(
+                    std::io::ErrorKind::InvalidData,
+                    "provider returned neither JSON nor SSE JSON payload",
+                ))
+            })
+        })
+        .map_err(|error| Error::BadRequest(format!("AI response parse failed: {error}")))
+}
+
 async fn request_json(client: &Client, url: &str, api_key: &str, payload: Value) -> Result<Value> {
     let response = client
         .post(url)
@@ -626,20 +705,56 @@ async fn request_json(client: &Client, url: &str, api_key: &str, payload: Value)
         )));
     }
 
-    serde_json::from_str(&body)
-        .or_else(|_| {
-            parse_provider_sse_body(&body).ok_or_else(|| {
-                serde_json::Error::io(std::io::Error::new(
-                    std::io::ErrorKind::InvalidData,
-                    "provider returned neither JSON nor SSE JSON payload",
-                ))
-            })
-        })
-        .map_err(|error| Error::BadRequest(format!("AI response parse failed: {error}")))
+    parse_json_body(&body)
+}
+
+async fn request_multipart_json(
+    client: &Client,
+    url: &str,
+    api_key: &str,
+    form: multipart::Form,
+) -> Result<Value> {
+    let response = client
+        .post(url)
+        .bearer_auth(api_key)
+        .header("Accept", "application/json")
+        .multipart(form)
+        .send()
+        .await
+        .map_err(|error| Error::BadRequest(format!("AI request failed: {error}")))?;
+
+    let status = response.status();
+    let body = response
+        .text()
+        .await
+        .map_err(|error| Error::BadRequest(format!("AI response read failed: {error}")))?;
+
+    if !status.is_success() {
+        return Err(Error::BadRequest(format!(
+            "AI provider returned {status}: {body}"
+        )));
+    }
+
+    parse_json_body(&body)
 }
 
 fn provider_uses_responses(provider: &str) -> bool {
     provider.eq_ignore_ascii_case("newapi")
+        || provider.eq_ignore_ascii_case("openai")
+        || provider.eq_ignore_ascii_case("anthropic")
+        || provider.eq_ignore_ascii_case("gemini")
+}
+
+fn default_image_model_for_provider_name(provider: &str) -> &'static str {
+    if provider_uses_cloudflare(provider) {
+        DEFAULT_CLOUDFLARE_IMAGE_MODEL
+    } else {
+        DEFAULT_IMAGE_MODEL
+    }
+}
+
+pub fn default_image_model_for_provider(provider: &str) -> &'static str {
+    default_image_model_for_provider_name(provider)
 }
 
 async fn embed_texts_locally(inputs: Vec<String>, kind: EmbeddingKind) -> Result<Vec<Vec<f64>>> {
@@ -1015,6 +1130,66 @@ fn build_polish_markdown_prompt(markdown: &str) -> String {
     )
 }
 
+fn build_polish_review_prompt(
+    title: &str,
+    review_type: &str,
+    rating: i32,
+    review_date: Option<&str>,
+    status: &str,
+    tags: &[String],
+    description: &str,
+) -> String {
+    let review_date_text = review_date
+        .map(str::trim)
+        .filter(|value| !value.is_empty())
+        .unwrap_or("未填写");
+    let tag_text = if tags.is_empty() {
+        "无".to_string()
+    } else {
+        tags.join(" / ")
+    };
+
+    format!(
+        "请润色一段中文作品评测简介/点评文案。\n\
+要求：\n\
+1. 保留原文观点、倾向和结论，不要杜撰剧情、设定或体验细节。\n\
+2. 语言更凝练、更自然，适合放在评测页中展示。\n\
+3. 可以优化句式与节奏，但不要改写成标题、列表或营销文案。\n\
+4. 默认输出一到三段正文，总长度尽量控制在 80 到 220 字之间；如果原文本身更长，可适度保留信息密度。\n\
+5. 只返回润色后的简介正文，不要附加解释。\n\n\
+作品标题：{}\n\
+评测类型：{}\n\
+评分：{}/5\n\
+评测日期：{}\n\
+状态：{}\n\
+标签：{}\n\n\
+当前简介：\n{}",
+        title.trim(),
+        review_type.trim(),
+        rating,
+        review_date_text,
+        status.trim(),
+        tag_text,
+        description.trim(),
+    )
+}
+
+fn ensure_sentence_ending(text: &str) -> String {
+    let trimmed = text.trim();
+    if trimmed.is_empty() {
+        return String::new();
+    }
+
+    if matches!(
+        trimmed.chars().last(),
+        Some('。' | '！' | '？' | '.' | '!' | '?')
+    ) {
+        trimmed.to_string()
+    } else {
+        format!("{trimmed}。")
+    }
+}
+
 fn build_post_cover_prompt(
     title: &str,
     description: Option<&str>,
@@ -1063,12 +1238,40 @@ fn build_post_cover_prompt(
     )
 }
 
-fn build_image_generation_url(provider: &str, api_base: &str) -> String {
+fn build_image_generation_url(provider: &str, api_base: &str, image_model: &str) -> String {
     let normalized = normalize_provider_api_base(provider, api_base);
+
+    if provider_uses_cloudflare(provider) {
+        return build_endpoint(&normalized, &format!("/ai/run/{}", image_model.trim()));
+    }
+
     build_endpoint(&normalized, "/images/generations")
 }
 
 fn extract_image_generation_result(value: &Value) -> Option<String> {
+    if let Some(result) = value.get("result") {
+        if let Some(image) = result.get("image").and_then(Value::as_str) {
+            let trimmed = image.trim();
+            if !trimmed.is_empty() {
+                return Some(trimmed.to_string());
+            }
+        }
+
+        if let Some(url) = result.get("url").and_then(Value::as_str) {
+            let trimmed = url.trim();
+            if !trimmed.is_empty() {
+                return Some(trimmed.to_string());
+            }
+        }
+    }
+
+    if let Some(image) = value.get("image").and_then(Value::as_str) {
+        let trimmed = image.trim();
+        if !trimmed.is_empty() {
+            return Some(trimmed.to_string());
+        }
+    }
+
     let data = value.get("data").and_then(Value::as_array)?;
 
     for item in data {
@@ -1115,25 +1318,113 @@ fn generated_cover_directory() -> PathBuf {
         })
 }
 
-fn persist_generated_cover_image(slug_hint: &str, base64_data: &str) -> Result<String> {
+fn image_details_from_mime(content_type: &str) -> Option<(&'static str, &'static str)> {
+    match content_type
+        .trim()
+        .split(';')
+        .next()
+        .unwrap_or_default()
+        .trim()
+        .to_ascii_lowercase()
+        .as_str()
+    {
+        "image/png" => Some(("png", "image/png")),
+        "image/jpeg" | "image/jpg" => Some(("jpg", "image/jpeg")),
+        "image/webp" => Some(("webp", "image/webp")),
+        "image/gif" => Some(("gif", "image/gif")),
+        "image/svg+xml" => Some(("svg", "image/svg+xml")),
+        _ => None,
+    }
+}
+
+fn image_details_from_extension(extension: &str) -> Option<(&'static str, &'static str)> {
+    match extension
+        .trim()
+        .trim_start_matches('.')
+        .to_ascii_lowercase()
+        .as_str()
+    {
+        "png" => Some(("png", "image/png")),
+        "jpg" | "jpeg" => Some(("jpg", "image/jpeg")),
+        "webp" => Some(("webp", "image/webp")),
+        "gif" => Some(("gif", "image/gif")),
+        "svg" => Some(("svg", "image/svg+xml")),
+        _ => None,
+    }
+}
+
+fn image_details_from_url(url: &str) -> Option<(&'static str, &'static str)> {
+    let parsed = Url::parse(url).ok()?;
+    let path = parsed.path();
+    let extension = path.rsplit_once('.')?.1;
+    image_details_from_extension(extension)
+}
+
+fn decode_base64_image_payload(base64_data: &str) -> Result<(Vec<u8>, &'static str, &'static str)> {
+    let trimmed = base64_data.trim();
+    let (payload, extension, content_type) = if let Some(rest) = trimmed.strip_prefix("data:") {
+        let (metadata, encoded) = rest
+            .split_once(',')
+            .ok_or_else(|| Error::BadRequest("AI 封面图 data URL 格式不正确".to_string()))?;
+        let mime = metadata
+            .split(';')
+            .next()
+            .filter(|value| !value.trim().is_empty())
+            .unwrap_or("image/png");
+        let (extension, content_type) =
+            image_details_from_mime(mime).unwrap_or(("png", "image/png"));
+        (encoded, extension, content_type)
+    } else {
+        (trimmed, "png", "image/png")
+    };
+
+    let image_bytes = BASE64_STANDARD
+        .decode(payload)
+        .map_err(|error| Error::BadRequest(format!("解析 AI 封面图失败: {error}")))?;
+
+    Ok((image_bytes, extension, content_type))
+}
+
+async fn persist_generated_cover_image_bytes(
+    ctx: &AppContext,
+    slug_hint: &str,
+    image_bytes: Vec<u8>,
+    extension: &str,
+    content_type: &str,
+) -> Result<String> {
+    if storage::optional_r2_settings(ctx).await?.is_some() {
+        let key = storage::build_object_key("post-covers", slug_hint, extension);
+        let stored = storage::upload_bytes_to_r2(
+            ctx,
+            &key,
+            image_bytes,
+            Some(content_type),
+            Some("public, max-age=31536000, immutable"),
+        )
+        .await?;
+
+        return Ok(stored.url);
+    }
+
     let directory = generated_cover_directory();
     fs::create_dir_all(&directory)
         .map_err(|error| Error::BadRequest(format!("创建封面图目录失败: {error}")))?;
 
     let safe_slug = metadata_slugify(slug_hint);
     let file_name = format!(
-        "{}-{}.png",
+        "{}-{}.{}",
         if safe_slug.is_empty() {
             "cover".to_string()
         } else {
             safe_slug
         },
-        Uuid::new_v4().simple()
+        Uuid::new_v4().simple(),
+        extension
+            .trim()
+            .trim_start_matches('.')
+            .to_ascii_lowercase()
     );
     let file_path = directory.join(&file_name);
-    let image_bytes = BASE64_STANDARD
-        .decode(base64_data)
-        .map_err(|error| Error::BadRequest(format!("解析 AI 封面图失败: {error}")))?;
 
     fs::write(&file_path, image_bytes)
         .map_err(|error| Error::BadRequest(format!("写入 AI 封面图失败: {error}")))?;
@@ -1141,6 +1432,49 @@ fn persist_generated_cover_image(slug_hint: &str, base64_data: &str) -> Result<S
     Ok(format!("/generated-covers/{file_name}"))
 }
 
+async fn persist_generated_cover_image(
+    ctx: &AppContext,
+    slug_hint: &str,
+    image_result: &str,
+) -> Result<String> {
+    if image_result.starts_with("http://") || image_result.starts_with("https://") {
+        let client = Client::new();
+        let response = client
+            .get(image_result)
+            .send()
+            .await
+            .map_err(|error| Error::BadRequest(format!("下载 AI 封面图失败: {error}")))?
+            .error_for_status()
+            .map_err(|error| Error::BadRequest(format!("下载 AI 封面图失败: {error}")))?;
+        let content_type_header = response
+            .headers()
+            .get(CONTENT_TYPE)
+            .and_then(|value| value.to_str().ok())
+            .map(ToString::to_string);
+        let image_bytes = response
+            .bytes()
+            .await
+            .map_err(|error| Error::BadRequest(format!("读取 AI 封面图失败: {error}")))?;
+        let (extension, content_type) = content_type_header
+            .as_deref()
+            .and_then(image_details_from_mime)
+            .or_else(|| image_details_from_url(image_result))
+            .unwrap_or(("png", "image/png"));
+
+        return persist_generated_cover_image_bytes(
+            ctx,
+            slug_hint,
+            image_bytes.to_vec(),
+            extension,
+            content_type,
+        )
+        .await;
+    }
+
+    let (image_bytes, extension, content_type) = decode_base64_image_payload(image_result)?;
+    persist_generated_cover_image_bytes(ctx, slug_hint, image_bytes, extension, content_type).await
+}
+
 fn fallback_polished_markdown(markdown: &str) -> String {
     let metadata = fallback_generated_metadata(markdown);
     let body = strip_markdown_frontmatter(markdown)
@@ -1176,6 +1510,17 @@ tags:\n{}\n\
     )
 }
 
+fn fallback_polished_review_description(description: &str) -> String {
+    let normalized = normalize_newlines(description)
+        .lines()
+        .map(str::trim)
+        .filter(|line| !line.is_empty())
+        .collect::<Vec<_>>()
+        .join("\n\n");
+
+    ensure_sentence_ending(&normalized)
+}
+
 pub async fn generate_post_metadata(
     ctx: &AppContext,
     markdown: &str,
@@ -1303,6 +1648,85 @@ pub async fn polish_post_markdown(
     }
 }
 
+pub async fn polish_review_description(
+    ctx: &AppContext,
+    title: &str,
+    review_type: &str,
+    rating: i32,
+    review_date: Option<&str>,
+    status: &str,
+    tags: &[String],
+    description: &str,
+) -> Result<PolishedReviewDescription> {
+    let trimmed_description = description.trim();
+    if trimmed_description.is_empty() {
+        return Err(Error::BadRequest(
+            "请先填写点评内容，再进行润色。".to_string(),
+        ));
+    }
+
+    let settings = load_runtime_settings(ctx, false).await?;
+    let remote_result: Result<PolishedReviewDescription> = match (
+        settings.api_base.clone(),
+        settings.api_key.clone(),
+    ) {
+        (Some(api_base), Some(api_key)) => {
+            let request = AiProviderRequest {
+                provider: settings.provider.clone(),
+                api_base,
+                api_key,
+                chat_model: settings.chat_model.clone(),
+                system_prompt: "你是中文内容平台里的资深评测编辑。你只负责润色用户已有的作品点评文案，不要改写核心观点，不要虚构事实，不要输出额外解释。".to_string(),
+                prompt: build_polish_review_prompt(
+                    title,
+                    review_type,
+                    rating,
+                    review_date,
+                    status,
+                    tags,
+                    trimmed_description,
+                ),
+            };
+
+            let client = Client::new();
+            let response = request_json(
+                &client,
+                &build_provider_url(&request),
+                &request.api_key,
+                build_provider_payload(&request, false),
+            )
+            .await;
+
+            match response {
+                Ok(response) => {
+                    let polished_description =
+                        extract_provider_text(&response).ok_or_else(|| {
+                            Error::BadRequest("AI 润色响应里没有可读取内容。".to_string())
+                        })?;
+
+                    Ok(PolishedReviewDescription {
+                        polished_description: normalize_newlines(polished_description.trim()),
+                    })
+                }
+                Err(error) => Err(error),
+            }
+        }
+        _ => Err(Error::BadRequest(
+            "AI 服务未配置完整，已自动切换为本地智能润色。".to_string(),
+        )),
+    };
+
+    match remote_result {
+        Ok(result) => Ok(result),
+        Err(error) => {
+            tracing::warn!("AI review polish fallback: {error}");
+            Ok(PolishedReviewDescription {
+                polished_description: fallback_polished_review_description(trimmed_description),
+            })
+        }
+    }
+}
+
 pub async fn generate_post_cover_image(
     ctx: &AppContext,
     title: &str,
@@ -1323,14 +1747,14 @@ pub async fn generate_post_cover_image(
     }
 
     let settings = load_runtime_settings(ctx, false).await?;
-    let api_base = settings
-        .api_base
-        .clone()
-        .ok_or_else(|| Error::BadRequest("AI API Base 未配置，无法生成封面图。".to_string()))?;
-    let api_key = settings
+    let image_settings = settings.image.clone();
+    let api_base = image_settings.api_base.clone().ok_or_else(|| {
+        Error::BadRequest("图片 AI API Base 未配置，无法生成封面图。".to_string())
+    })?;
+    let api_key = image_settings
         .api_key
         .clone()
-        .ok_or_else(|| Error::BadRequest("AI API Key 未配置，无法生成封面图。".to_string()))?;
+        .ok_or_else(|| Error::BadRequest("图片 AI API Key 未配置，无法生成封面图。".to_string()))?;
     let prompt = build_post_cover_prompt(
         if trimmed_title.is_empty() {
             "未命名文章"
@@ -1343,33 +1767,22 @@ pub async fn generate_post_cover_image(
         post_type,
         trimmed_markdown,
     );
-    let payload = json!({
-        "model": DEFAULT_IMAGE_MODEL,
-        "prompt": prompt,
-        "size": "1536x1024",
-        "quality": "high",
-        "output_format": "png"
-    });
-
-    let client = Client::new();
-    let response = request_json(
-        &client,
-        &build_image_generation_url(&settings.provider, &api_base),
+    let image_model = image_settings.image_model.clone();
+    let response = request_image_generation(
+        &image_settings.provider,
+        &api_base,
         &api_key,
-        payload,
+        &image_model,
+        &prompt,
     )
     .await?;
     let image_result = extract_image_generation_result(&response)
         .ok_or_else(|| Error::BadRequest("AI 封面图响应里没有可读取图片。".to_string()))?;
-    let image_url = if image_result.starts_with("http://") || image_result.starts_with("https://") {
-        image_result
-    } else {
-        let slug_hint = slug
-            .map(str::trim)
-            .filter(|value| !value.is_empty())
-            .unwrap_or(trimmed_title);
-        persist_generated_cover_image(slug_hint, &image_result)?
-    };
+    let slug_hint = slug
+        .map(str::trim)
+        .filter(|value| !value.is_empty())
+        .unwrap_or(trimmed_title);
+    let image_url = persist_generated_cover_image(ctx, slug_hint, &image_result).await?;
 
     Ok(GeneratedPostCoverImage { image_url, prompt })
 }
@@ -1389,6 +1802,12 @@ fn extract_response_output(value: &Value) -> Option<String> {
         }
     }
 
+    if let Some(result) = value.get("result") {
+        if let Some(text) = extract_response_output(result) {
+            return Some(text);
+        }
+    }
+
     if let Some(response) = value.get("response") {
         if let Some(text) = extract_response_output(response) {
             return Some(text);
@@ -1590,7 +2009,16 @@ fn build_sources(matches: &[ScoredChunk]) -> Vec<AiSource> {
 }
 
 pub(crate) fn build_provider_payload(request: &AiProviderRequest, stream: bool) -> Value {
-    if provider_uses_responses(&request.provider) {
+    if provider_uses_cloudflare(&request.provider) {
+        json!({
+            "prompt": format!(
+                "系统指令：{}
+
+用户请求：{}",
+                request.system_prompt, request.prompt,
+            )
+        })
+    } else if provider_uses_responses(&request.provider) {
         json!({
             "model": request.chat_model,
             "input": [
@@ -1640,13 +2068,15 @@ pub(crate) fn build_provider_payload(request: &AiProviderRequest, stream: bool)
 
 pub(crate) fn build_provider_url(request: &AiProviderRequest) -> String {
     let api_base = normalize_provider_api_base(&request.provider, &request.api_base);
-    let path = if provider_uses_responses(&request.provider) {
-        "/responses"
+    let path = if provider_uses_cloudflare(&request.provider) {
+        format!("/ai/run/{}", request.chat_model.trim())
+    } else if provider_uses_responses(&request.provider) {
+        "/responses".to_string()
     } else {
-        "/chat/completions"
+        "/chat/completions".to_string()
     };
 
-    build_endpoint(&api_base, path)
+    build_endpoint(&api_base, &path)
 }
 
 #[cfg(test)]
@@ -1701,6 +2131,25 @@ mod tests {
         );
     }
 
+    #[test]
+    fn normalize_provider_api_base_supports_cloudflare_account_id() {
+        assert_eq!(
+            normalize_provider_api_base("cloudflare", "test-account-id"),
+            "https://api.cloudflare.com/client/v4/accounts/test-account-id"
+        );
+    }
+
+    #[test]
+    fn build_provider_url_uses_cloudflare_run_endpoint() {
+        let mut request = build_request("cloudflare", "test-account-id");
+        request.chat_model = "@cf/meta/llama-3.1-8b-instruct".to_string();
+
+        assert_eq!(
+            build_provider_url(&request),
+            "https://api.cloudflare.com/client/v4/accounts/test-account-id/ai/run/@cf/meta/llama-3.1-8b-instruct"
+        );
+    }
+
     #[test]
     fn profile_question_detects_owner_keywords() {
         assert!(is_profile_question("站长的技术栈和个人介绍是什么？"));
@@ -1780,6 +2229,59 @@ async fn request_chat_answer(request: &AiProviderRequest) -> Result<String> {
     })
 }
 
+async fn request_image_generation(
+    provider: &str,
+    api_base: &str,
+    api_key: &str,
+    image_model: &str,
+    prompt: &str,
+) -> Result<Value> {
+    let client = Client::new();
+
+    if provider_uses_cloudflare(provider) {
+        if image_model.eq_ignore_ascii_case(DEFAULT_CLOUDFLARE_IMAGE_MODEL) {
+            let form = multipart::Form::new()
+                .text("prompt", prompt.to_string())
+                .text("width", "1024")
+                .text("height", "576")
+                .text("steps", "16");
+
+            return request_multipart_json(
+                &client,
+                &build_image_generation_url(provider, api_base, image_model),
+                api_key,
+                form,
+            )
+            .await;
+        }
+
+        return request_json(
+            &client,
+            &build_image_generation_url(provider, api_base, image_model),
+            api_key,
+            json!({
+                "prompt": prompt,
+                "steps": 4
+            }),
+        )
+        .await;
+    }
+
+    request_json(
+        &client,
+        &build_image_generation_url(provider, api_base, image_model),
+        api_key,
+        json!({
+            "model": image_model,
+            "prompt": prompt,
+            "size": "1536x1024",
+            "quality": "high",
+            "output_format": "png"
+        }),
+    )
+    .await
+}
+
 pub async fn test_provider_connectivity(
     provider: &str,
     api_base: &str,
@@ -1814,6 +2316,59 @@ pub async fn test_provider_connectivity(
     })
 }
 
+pub async fn test_image_provider_connectivity(
+    provider: &str,
+    api_base: &str,
+    api_key: &str,
+    image_model: &str,
+) -> Result<AiImageProviderConnectivityResult> {
+    let provider = trim_to_option(Some(provider.to_string()))
+        .unwrap_or_else(|| DEFAULT_AI_PROVIDER.to_string());
+    let api_base = trim_to_option(Some(api_base.to_string()))
+        .ok_or_else(|| Error::BadRequest("请先填写图片 API 地址".to_string()))?;
+    let api_key = trim_to_option(Some(api_key.to_string()))
+        .ok_or_else(|| Error::BadRequest("请先填写图片 API 密钥".to_string()))?;
+    let image_model = trim_to_option(Some(image_model.to_string()))
+        .ok_or_else(|| Error::BadRequest("请先填写图片模型".to_string()))?;
+
+    let prompt = "Minimal abstract technology cover art, blue gradient, no text, no watermark";
+    let response = if provider_uses_cloudflare(&provider)
+        && image_model.eq_ignore_ascii_case(DEFAULT_CLOUDFLARE_IMAGE_MODEL)
+    {
+        let client = Client::new();
+        let form = multipart::Form::new()
+            .text("prompt", prompt.to_string())
+            .text("width", "512")
+            .text("height", "288")
+            .text("steps", "4");
+
+        request_multipart_json(
+            &client,
+            &build_image_generation_url(&provider, &api_base, &image_model),
+            &api_key,
+            form,
+        )
+        .await?
+    } else {
+        request_image_generation(&provider, &api_base, &api_key, &image_model, prompt).await?
+    };
+    let image_result = extract_image_generation_result(&response)
+        .ok_or_else(|| Error::BadRequest("图片接口响应里没有可读取的图片结果".to_string()))?;
+    let result_preview =
+        if image_result.starts_with("http://") || image_result.starts_with("https://") {
+            image_result
+        } else {
+            format!("base64 image ok ({} chars)", image_result.len())
+        };
+
+    Ok(AiImageProviderConnectivityResult {
+        provider: provider.clone(),
+        endpoint: build_image_generation_url(&provider, &api_base, &image_model),
+        image_model,
+        result_preview,
+    })
+}
+
 pub(crate) async fn prepare_answer(ctx: &AppContext, question: &str) -> Result<PreparedAiAnswer> {
     let trimmed_question = question.trim();
     if trimmed_question.is_empty() {
@@ -1907,12 +2462,72 @@ async fn load_runtime_settings(
         return Err(Error::NotFound);
     }
 
+    let active_provider =
+        site_settings_controller::active_ai_provider_id(&raw).and_then(|active_id| {
+            site_settings_controller::ai_provider_configs(&raw)
+                .into_iter()
+                .find(|item| item.id == active_id)
+        });
+    let provider = active_provider
+        .as_ref()
+        .map(|item| provider_name(Some(item.provider.as_str())))
+        .unwrap_or_else(|| provider_name(raw.ai_provider.as_deref()));
+    let api_base = active_provider
+        .as_ref()
+        .and_then(|item| trim_to_option(item.api_base.clone()))
+        .or_else(|| trim_to_option(raw.ai_api_base.clone()));
+    let api_key = active_provider
+        .as_ref()
+        .and_then(|item| trim_to_option(item.api_key.clone()))
+        .or_else(|| trim_to_option(raw.ai_api_key.clone()));
+    let chat_model = active_provider
+        .as_ref()
+        .and_then(|item| trim_to_option(item.chat_model.clone()))
+        .unwrap_or_else(|| {
+            if provider_uses_cloudflare(&provider) {
+                DEFAULT_CLOUDFLARE_CHAT_MODEL.to_string()
+            } else {
+                DEFAULT_CHAT_MODEL.to_string()
+            }
+        });
+    let legacy_image_model = active_provider
+        .as_ref()
+        .and_then(|item| trim_to_option(item.image_model.clone()))
+        .unwrap_or_else(|| default_image_model_for_provider_name(&provider).to_string());
+    let image_provider = trim_to_option(raw.ai_image_provider.clone());
+    let image_api_base = trim_to_option(raw.ai_image_api_base.clone());
+    let image_api_key = trim_to_option(raw.ai_image_api_key.clone());
+    let image_model = trim_to_option(raw.ai_image_model.clone());
+    let has_dedicated_image_settings = image_provider.is_some()
+        || image_api_base.is_some()
+        || image_api_key.is_some()
+        || image_model.is_some();
+    let image = if has_dedicated_image_settings {
+        let provider = image_provider.unwrap_or_else(|| provider.clone());
+        let image_model = image_model
+            .unwrap_or_else(|| default_image_model_for_provider_name(&provider).to_string());
+
+        AiImageRuntimeSettings {
+            provider,
+            api_base: image_api_base,
+            api_key: image_api_key,
+            image_model,
+        }
+    } else {
+        AiImageRuntimeSettings {
+            provider: provider.clone(),
+            api_base: api_base.clone(),
+            api_key: api_key.clone(),
+            image_model: legacy_image_model,
+        }
+    };
+
     Ok(AiRuntimeSettings {
-        provider: provider_name(raw.ai_provider.as_deref()),
-        api_base: trim_to_option(raw.ai_api_base.clone()),
-        api_key: trim_to_option(raw.ai_api_key.clone()),
-        chat_model: trim_to_option(raw.ai_chat_model.clone())
-            .unwrap_or_else(|| DEFAULT_CHAT_MODEL.to_string()),
+        provider,
+        api_base,
+        api_key,
+        chat_model,
+        image,
         system_prompt: trim_to_option(raw.ai_system_prompt.clone())
             .unwrap_or_else(|| DEFAULT_SYSTEM_PROMPT.to_string()),
         top_k: raw

backend/src/services/analytics.rs

@@ -0,0 +1,441 @@
+use std::collections::{BTreeMap, HashMap};
+
+use axum::http::HeaderMap;
+use chrono::{DateTime, Duration, NaiveDate, Utc};
+use loco_rs::prelude::*;
+use sea_orm::{
+    ActiveModelTrait, ColumnTrait, EntityTrait, PaginatorTrait, QueryFilter, QueryOrder,
+    QuerySelect, Set,
+};
+use serde::Serialize;
+
+use crate::models::_entities::query_events;
+
+const EVENT_TYPE_SEARCH: &str = "search";
+const EVENT_TYPE_AI_QUESTION: &str = "ai_question";
+
+#[derive(Clone, Debug, Default)]
+pub struct QueryEventRequestContext {
+    pub request_path: Option<String>,
+    pub referrer: Option<String>,
+    pub user_agent: Option<String>,
+}
+
+#[derive(Clone, Debug)]
+pub struct QueryEventDraft {
+    pub event_type: String,
+    pub query_text: String,
+    pub request_context: QueryEventRequestContext,
+    pub result_count: Option<i32>,
+    pub success: Option<bool>,
+    pub response_mode: Option<String>,
+    pub provider: Option<String>,
+    pub chat_model: Option<String>,
+    pub latency_ms: Option<i32>,
+}
+
+#[derive(Clone, Debug, Serialize)]
+pub struct AnalyticsOverview {
+    pub total_searches: u64,
+    pub total_ai_questions: u64,
+    pub searches_last_24h: u64,
+    pub ai_questions_last_24h: u64,
+    pub searches_last_7d: u64,
+    pub ai_questions_last_7d: u64,
+    pub unique_search_terms_last_7d: usize,
+    pub unique_ai_questions_last_7d: usize,
+    pub avg_search_results_last_7d: f64,
+    pub avg_ai_latency_ms_last_7d: Option<f64>,
+}
+
+#[derive(Clone, Debug, Serialize)]
+pub struct AnalyticsTopQuery {
+    pub query: String,
+    pub count: u64,
+    pub last_seen_at: String,
+}
+
+#[derive(Clone, Debug, Serialize)]
+pub struct AnalyticsRecentEvent {
+    pub id: i32,
+    pub event_type: String,
+    pub query: String,
+    pub result_count: Option<i32>,
+    pub success: Option<bool>,
+    pub response_mode: Option<String>,
+    pub provider: Option<String>,
+    pub chat_model: Option<String>,
+    pub latency_ms: Option<i32>,
+    pub created_at: String,
+}
+
+#[derive(Clone, Debug, Serialize)]
+pub struct AnalyticsProviderBucket {
+    pub provider: String,
+    pub count: u64,
+}
+
+#[derive(Clone, Debug, Serialize)]
+pub struct AnalyticsDailyBucket {
+    pub date: String,
+    pub searches: u64,
+    pub ai_questions: u64,
+}
+
+#[derive(Clone, Debug, Serialize)]
+pub struct AdminAnalyticsResponse {
+    pub overview: AnalyticsOverview,
+    pub top_search_terms: Vec<AnalyticsTopQuery>,
+    pub top_ai_questions: Vec<AnalyticsTopQuery>,
+    pub recent_events: Vec<AnalyticsRecentEvent>,
+    pub providers_last_7d: Vec<AnalyticsProviderBucket>,
+    pub daily_activity: Vec<AnalyticsDailyBucket>,
+}
+
+#[derive(Clone, Debug)]
+struct QueryAggregate {
+    query: String,
+    count: u64,
+    last_seen_at: DateTime<Utc>,
+}
+
+fn trim_to_option(value: Option<String>) -> Option<String> {
+    value.and_then(|item| {
+        let trimmed = item.trim().to_string();
+        if trimmed.is_empty() {
+            None
+        } else {
+            Some(trimmed)
+        }
+    })
+}
+
+fn normalize_query(value: &str) -> String {
+    value
+        .split_whitespace()
+        .collect::<Vec<_>>()
+        .join(" ")
+        .to_lowercase()
+}
+
+fn format_timestamp(value: DateTime<Utc>) -> String {
+    value.format("%Y-%m-%d %H:%M").to_string()
+}
+
+fn header_value(headers: &HeaderMap, key: &str) -> Option<String> {
+    headers
+        .get(key)
+        .and_then(|value| value.to_str().ok())
+        .map(ToString::to_string)
+        .and_then(|value| trim_to_option(Some(value)))
+}
+
+fn clamp_latency(latency_ms: i64) -> i32 {
+    latency_ms.clamp(0, i64::from(i32::MAX)) as i32
+}
+
+fn build_query_aggregates(
+    events: &[query_events::Model],
+    wanted_type: &str,
+) -> Vec<QueryAggregate> {
+    let mut grouped: HashMap<String, QueryAggregate> = HashMap::new();
+
+    for event in events
+        .iter()
+        .filter(|event| event.event_type == wanted_type)
+    {
+        let entry = grouped
+            .entry(event.normalized_query.clone())
+            .or_insert_with(|| QueryAggregate {
+                query: event.query_text.clone(),
+                count: 0,
+                last_seen_at: event.created_at.into(),
+            });
+
+        entry.count += 1;
+
+        let created_at = DateTime::<Utc>::from(event.created_at);
+        if created_at >= entry.last_seen_at {
+            entry.query = event.query_text.clone();
+            entry.last_seen_at = created_at;
+        }
+    }
+
+    let mut items = grouped.into_values().collect::<Vec<_>>();
+    items.sort_by(|left, right| {
+        right
+            .count
+            .cmp(&left.count)
+            .then_with(|| right.last_seen_at.cmp(&left.last_seen_at))
+    });
+    items
+}
+
+fn aggregate_queries(
+    events: &[query_events::Model],
+    wanted_type: &str,
+    limit: usize,
+) -> (usize, Vec<AnalyticsTopQuery>) {
+    let aggregates = build_query_aggregates(events, wanted_type);
+    let total_unique = aggregates.len();
+    let items = aggregates
+        .into_iter()
+        .take(limit)
+        .map(|item| AnalyticsTopQuery {
+            query: item.query,
+            count: item.count,
+            last_seen_at: format_timestamp(item.last_seen_at),
+        })
+        .collect::<Vec<_>>();
+
+    (total_unique, items)
+}
+
+pub fn request_context_from_headers(path: &str, headers: &HeaderMap) -> QueryEventRequestContext {
+    QueryEventRequestContext {
+        request_path: trim_to_option(Some(path.to_string())),
+        referrer: header_value(headers, "referer"),
+        user_agent: header_value(headers, "user-agent"),
+    }
+}
+
+pub async fn record_event(ctx: &AppContext, draft: QueryEventDraft) {
+    let query_text = draft.query_text.trim().to_string();
+    if query_text.is_empty() {
+        return;
+    }
+
+    let active_model = query_events::ActiveModel {
+        event_type: Set(draft.event_type),
+        query_text: Set(query_text.clone()),
+        normalized_query: Set(normalize_query(&query_text)),
+        request_path: Set(trim_to_option(draft.request_context.request_path)),
+        referrer: Set(trim_to_option(draft.request_context.referrer)),
+        user_agent: Set(trim_to_option(draft.request_context.user_agent)),
+        result_count: Set(draft.result_count),
+        success: Set(draft.success),
+        response_mode: Set(trim_to_option(draft.response_mode)),
+        provider: Set(trim_to_option(draft.provider)),
+        chat_model: Set(trim_to_option(draft.chat_model)),
+        latency_ms: Set(draft.latency_ms.map(|value| value.max(0))),
+        ..Default::default()
+    };
+
+    if let Err(error) = active_model.insert(&ctx.db).await {
+        tracing::warn!("failed to record query analytics event: {error}");
+    }
+}
+
+pub async fn record_search_event(
+    ctx: &AppContext,
+    query_text: &str,
+    result_count: usize,
+    headers: &HeaderMap,
+    latency_ms: i64,
+) {
+    record_event(
+        ctx,
+        QueryEventDraft {
+            event_type: EVENT_TYPE_SEARCH.to_string(),
+            query_text: query_text.to_string(),
+            request_context: request_context_from_headers("/api/search", headers),
+            result_count: Some(result_count.min(i32::MAX as usize) as i32),
+            success: Some(true),
+            response_mode: None,
+            provider: None,
+            chat_model: None,
+            latency_ms: Some(clamp_latency(latency_ms)),
+        },
+    )
+    .await;
+}
+
+pub async fn record_ai_question_event(
+    ctx: &AppContext,
+    question: &str,
+    headers: &HeaderMap,
+    success: bool,
+    response_mode: &str,
+    provider: Option<String>,
+    chat_model: Option<String>,
+    result_count: Option<usize>,
+    latency_ms: i64,
+) {
+    record_event(
+        ctx,
+        QueryEventDraft {
+            event_type: EVENT_TYPE_AI_QUESTION.to_string(),
+            query_text: question.to_string(),
+            request_context: request_context_from_headers(
+                if response_mode == "stream" {
+                    "/api/ai/ask/stream"
+                } else {
+                    "/api/ai/ask"
+                },
+                headers,
+            ),
+            result_count: result_count.map(|value| value.min(i32::MAX as usize) as i32),
+            success: Some(success),
+            response_mode: Some(response_mode.to_string()),
+            provider,
+            chat_model,
+            latency_ms: Some(clamp_latency(latency_ms)),
+        },
+    )
+    .await;
+}
+
+pub async fn build_admin_analytics(ctx: &AppContext) -> Result<AdminAnalyticsResponse> {
+    let now = Utc::now();
+    let since_24h = now - Duration::hours(24);
+    let since_7d = now - Duration::days(7);
+
+    let total_searches = query_events::Entity::find()
+        .filter(query_events::Column::EventType.eq(EVENT_TYPE_SEARCH))
+        .count(&ctx.db)
+        .await?;
+    let total_ai_questions = query_events::Entity::find()
+        .filter(query_events::Column::EventType.eq(EVENT_TYPE_AI_QUESTION))
+        .count(&ctx.db)
+        .await?;
+
+    let searches_last_24h = query_events::Entity::find()
+        .filter(query_events::Column::EventType.eq(EVENT_TYPE_SEARCH))
+        .filter(query_events::Column::CreatedAt.gte(since_24h))
+        .count(&ctx.db)
+        .await?;
+    let ai_questions_last_24h = query_events::Entity::find()
+        .filter(query_events::Column::EventType.eq(EVENT_TYPE_AI_QUESTION))
+        .filter(query_events::Column::CreatedAt.gte(since_24h))
+        .count(&ctx.db)
+        .await?;
+
+    let last_7d_events = query_events::Entity::find()
+        .filter(query_events::Column::CreatedAt.gte(since_7d))
+        .order_by_desc(query_events::Column::CreatedAt)
+        .all(&ctx.db)
+        .await?;
+
+    let searches_last_7d = last_7d_events
+        .iter()
+        .filter(|event| event.event_type == EVENT_TYPE_SEARCH)
+        .count() as u64;
+    let ai_questions_last_7d = last_7d_events
+        .iter()
+        .filter(|event| event.event_type == EVENT_TYPE_AI_QUESTION)
+        .count() as u64;
+
+    let (unique_search_terms_last_7d, top_search_terms) =
+        aggregate_queries(&last_7d_events, EVENT_TYPE_SEARCH, 8);
+    let (unique_ai_questions_last_7d, top_ai_questions) =
+        aggregate_queries(&last_7d_events, EVENT_TYPE_AI_QUESTION, 8);
+
+    let mut provider_breakdown: HashMap<String, u64> = HashMap::new();
+    let mut daily_map: BTreeMap<NaiveDate, (u64, u64)> = BTreeMap::new();
+    let mut total_search_results = 0.0_f64;
+    let mut counted_search_results = 0_u64;
+    let mut total_ai_latency = 0.0_f64;
+    let mut counted_ai_latency = 0_u64;
+
+    for offset in 0..7 {
+        let date = (now - Duration::days(offset)).date_naive();
+        daily_map.entry(date).or_insert((0, 0));
+    }
+
+    for event in &last_7d_events {
+        let day = DateTime::<Utc>::from(event.created_at).date_naive();
+        let entry = daily_map.entry(day).or_insert((0, 0));
+
+        if event.event_type == EVENT_TYPE_SEARCH {
+            entry.0 += 1;
+            if let Some(result_count) = event.result_count {
+                total_search_results += f64::from(result_count.max(0));
+                counted_search_results += 1;
+            }
+            continue;
+        }
+
+        if event.event_type == EVENT_TYPE_AI_QUESTION {
+            entry.1 += 1;
+
+            let provider = event
+                .provider
+                .clone()
+                .filter(|value| !value.trim().is_empty())
+                .unwrap_or_else(|| "local-or-unspecified".to_string());
+            *provider_breakdown.entry(provider).or_insert(0) += 1;
+
+            if let Some(latency_ms) = event.latency_ms {
+                total_ai_latency += f64::from(latency_ms.max(0));
+                counted_ai_latency += 1;
+            }
+        }
+    }
+
+    let mut providers_last_7d = provider_breakdown
+        .into_iter()
+        .map(|(provider, count)| AnalyticsProviderBucket { provider, count })
+        .collect::<Vec<_>>();
+    providers_last_7d.sort_by(|left, right| {
+        right
+            .count
+            .cmp(&left.count)
+            .then_with(|| left.provider.cmp(&right.provider))
+    });
+    providers_last_7d.truncate(6);
+
+    let mut daily_activity = daily_map
+        .into_iter()
+        .map(|(date, (searches, ai_questions))| AnalyticsDailyBucket {
+            date: date.format("%Y-%m-%d").to_string(),
+            searches,
+            ai_questions,
+        })
+        .collect::<Vec<_>>();
+    daily_activity.sort_by(|left, right| left.date.cmp(&right.date));
+
+    let recent_events = query_events::Entity::find()
+        .order_by_desc(query_events::Column::CreatedAt)
+        .limit(24)
+        .all(&ctx.db)
+        .await?
+        .into_iter()
+        .map(|event| AnalyticsRecentEvent {
+            id: event.id,
+            event_type: event.event_type,
+            query: event.query_text,
+            result_count: event.result_count,
+            success: event.success,
+            response_mode: event.response_mode,
+            provider: event.provider,
+            chat_model: event.chat_model,
+            latency_ms: event.latency_ms,
+            created_at: format_timestamp(event.created_at.into()),
+        })
+        .collect::<Vec<_>>();
+
+    Ok(AdminAnalyticsResponse {
+        overview: AnalyticsOverview {
+            total_searches,
+            total_ai_questions,
+            searches_last_24h,
+            ai_questions_last_24h,
+            searches_last_7d,
+            ai_questions_last_7d,
+            unique_search_terms_last_7d,
+            unique_ai_questions_last_7d,
+            avg_search_results_last_7d: if counted_search_results > 0 {
+                total_search_results / counted_search_results as f64
+            } else {
+                0.0
+            },
+            avg_ai_latency_ms_last_7d: (counted_ai_latency > 0)
+                .then(|| total_ai_latency / counted_ai_latency as f64),
+        },
+        top_search_terms,
+        top_ai_questions,
+        recent_events,
+        providers_last_7d,
+        daily_activity,
+    })
+}

backend/src/services/mod.rs

@@ -1,2 +1,4 @@
 pub mod ai;
+pub mod analytics;
 pub mod content;
+pub mod storage;

backend/src/services/storage.rs

@@ -0,0 +1,513 @@
+use aws_config::BehaviorVersion;
+use aws_sdk_s3::{config::Credentials, primitives::ByteStream, Client};
+use loco_rs::prelude::*;
+use sea_orm::{EntityTrait, QueryOrder};
+use std::path::{Path, PathBuf};
+use uuid::Uuid;
+
+use crate::models::_entities::site_settings;
+
+const ENV_MEDIA_PROVIDER: &str = "TERMI_MEDIA_PROVIDER";
+const ENV_MEDIA_ENDPOINT: &str = "TERMI_MEDIA_ENDPOINT";
+const ENV_MEDIA_BUCKET: &str = "TERMI_MEDIA_BUCKET";
+const ENV_MEDIA_PUBLIC_BASE_URL: &str = "TERMI_MEDIA_PUBLIC_BASE_URL";
+const ENV_MEDIA_ACCESS_KEY_ID: &str = "TERMI_MEDIA_ACCESS_KEY_ID";
+const ENV_MEDIA_SECRET_ACCESS_KEY: &str = "TERMI_MEDIA_SECRET_ACCESS_KEY";
+
+const ENV_R2_ACCOUNT_ID: &str = "TERMI_R2_ACCOUNT_ID";
+const ENV_R2_BUCKET: &str = "TERMI_R2_BUCKET";
+const ENV_R2_PUBLIC_BASE_URL: &str = "TERMI_R2_PUBLIC_BASE_URL";
+const ENV_R2_ACCESS_KEY_ID: &str = "TERMI_R2_ACCESS_KEY_ID";
+const ENV_R2_SECRET_ACCESS_KEY: &str = "TERMI_R2_SECRET_ACCESS_KEY";
+
+#[derive(Clone, Debug, PartialEq, Eq)]
+pub enum MediaStorageProvider {
+    R2,
+    Minio,
+}
+
+#[derive(Clone, Debug)]
+pub struct MediaStorageSettings {
+    pub provider: MediaStorageProvider,
+    pub provider_name: String,
+    pub endpoint: String,
+    pub bucket: String,
+    pub public_base_url: String,
+    pub access_key_id: String,
+    pub secret_access_key: String,
+    pub region: String,
+    pub force_path_style: bool,
+}
+
+#[derive(Clone, Debug)]
+pub struct StoredObject {
+    pub key: String,
+    pub url: String,
+}
+
+#[derive(Clone, Debug)]
+pub struct StoredObjectSummary {
+    pub key: String,
+    pub url: String,
+    pub size_bytes: i64,
+    pub last_modified: Option<String>,
+}
+
+fn trim_to_option(value: Option<String>) -> Option<String> {
+    value.and_then(|item| {
+        let trimmed = item.trim().to_string();
+        if trimmed.is_empty() {
+            None
+        } else {
+            Some(trimmed)
+        }
+    })
+}
+
+fn env_value(name: &str) -> Option<String> {
+    std::env::var(name)
+        .ok()
+        .and_then(|value| trim_to_option(Some(value)))
+}
+
+fn slugify_segment(value: &str) -> String {
+    let mut output = String::new();
+    let mut previous_dash = false;
+
+    for ch in value.chars() {
+        if ch.is_ascii_alphanumeric() {
+            output.push(ch.to_ascii_lowercase());
+            previous_dash = false;
+        } else if !previous_dash {
+            output.push('-');
+            previous_dash = true;
+        }
+    }
+
+    output.trim_matches('-').to_string()
+}
+
+fn normalize_public_base_url(value: String) -> String {
+    value.trim().trim_end_matches('/').to_string()
+}
+
+fn normalize_provider(value: Option<String>) -> MediaStorageProvider {
+    match value
+        .as_deref()
+        .map(str::trim)
+        .unwrap_or_default()
+        .to_ascii_lowercase()
+        .as_str()
+    {
+        "minio" => MediaStorageProvider::Minio,
+        _ => MediaStorageProvider::R2,
+    }
+}
+
+async fn load_settings_row(ctx: &AppContext) -> Result<Option<site_settings::Model>> {
+    site_settings::Entity::find()
+        .order_by_asc(site_settings::Column::Id)
+        .one(&ctx.db)
+        .await
+        .map_err(Into::into)
+}
+
+fn build_r2_endpoint(account_id: &str) -> String {
+    let trimmed = account_id.trim().trim_end_matches('/');
+    if trimmed.starts_with("http://") || trimmed.starts_with("https://") {
+        trimmed.to_string()
+    } else {
+        format!("https://{trimmed}.r2.cloudflarestorage.com")
+    }
+}
+
+fn default_public_base_url_for_minio(endpoint: &str, bucket: &str) -> String {
+    format!(
+        "{}/{}",
+        endpoint.trim().trim_end_matches('/'),
+        bucket.trim().trim_start_matches('/')
+    )
+}
+
+pub fn generated_cover_directory() -> PathBuf {
+    let current_dir = std::env::current_dir().unwrap_or_else(|_| PathBuf::from("."));
+    let candidates = [
+        current_dir
+            .join("frontend")
+            .join("public")
+            .join("generated-covers"),
+        current_dir
+            .join("..")
+            .join("frontend")
+            .join("public")
+            .join("generated-covers"),
+    ];
+
+    candidates
+        .into_iter()
+        .find(|path| path.parent().map(|parent| parent.exists()).unwrap_or(false))
+        .unwrap_or_else(|| {
+            PathBuf::from("..")
+                .join("frontend")
+                .join("public")
+                .join("generated-covers")
+        })
+}
+
+pub fn file_extension_for_path(path: &Path) -> &str {
+    path.extension()
+        .and_then(|ext| ext.to_str())
+        .map(str::trim)
+        .filter(|ext| !ext.is_empty())
+        .unwrap_or("png")
+}
+
+pub async fn optional_r2_settings(ctx: &AppContext) -> Result<Option<MediaStorageSettings>> {
+    let row = load_settings_row(ctx).await?;
+
+    let provider_raw = row
+        .as_ref()
+        .and_then(|item| trim_to_option(item.media_storage_provider.clone()))
+        .or_else(|| env_value(ENV_MEDIA_PROVIDER));
+    let provider = normalize_provider(provider_raw.clone());
+
+    let endpoint_or_account = row
+        .as_ref()
+        .and_then(|item| trim_to_option(item.media_r2_account_id.clone()))
+        .or_else(|| env_value(ENV_MEDIA_ENDPOINT))
+        .or_else(|| env_value(ENV_R2_ACCOUNT_ID));
+    let bucket = row
+        .as_ref()
+        .and_then(|item| trim_to_option(item.media_r2_bucket.clone()))
+        .or_else(|| env_value(ENV_MEDIA_BUCKET))
+        .or_else(|| env_value(ENV_R2_BUCKET));
+    let access_key_id = row
+        .as_ref()
+        .and_then(|item| trim_to_option(item.media_r2_access_key_id.clone()))
+        .or_else(|| env_value(ENV_MEDIA_ACCESS_KEY_ID))
+        .or_else(|| env_value(ENV_R2_ACCESS_KEY_ID));
+    let secret_access_key = row
+        .as_ref()
+        .and_then(|item| trim_to_option(item.media_r2_secret_access_key.clone()))
+        .or_else(|| env_value(ENV_MEDIA_SECRET_ACCESS_KEY))
+        .or_else(|| env_value(ENV_R2_SECRET_ACCESS_KEY));
+
+    let public_base_url = row
+        .as_ref()
+        .and_then(|item| trim_to_option(item.media_r2_public_base_url.clone()))
+        .or_else(|| env_value(ENV_MEDIA_PUBLIC_BASE_URL))
+        .or_else(|| env_value(ENV_R2_PUBLIC_BASE_URL))
+        .or_else(
+            || match (&provider, endpoint_or_account.as_deref(), bucket.as_deref()) {
+                (MediaStorageProvider::Minio, Some(endpoint), Some(bucket)) => {
+                    Some(default_public_base_url_for_minio(endpoint, bucket))
+                }
+                _ => None,
+            },
+        );
+
+    let has_any = endpoint_or_account.is_some()
+        || bucket.is_some()
+        || public_base_url.is_some()
+        || access_key_id.is_some()
+        || secret_access_key.is_some()
+        || provider_raw.is_some();
+
+    if !has_any {
+        return Ok(None);
+    }
+
+    let missing = [
+        (
+            match provider {
+                MediaStorageProvider::Minio => "Endpoint",
+                MediaStorageProvider::R2 => "Account ID",
+            },
+            endpoint_or_account.is_some(),
+        ),
+        ("Bucket", bucket.is_some()),
+        ("Public Base URL", public_base_url.is_some()),
+        ("Access Key ID", access_key_id.is_some()),
+        ("Secret Access Key", secret_access_key.is_some()),
+    ]
+    .into_iter()
+    .filter_map(|(label, present)| (!present).then_some(label))
+    .collect::<Vec<_>>();
+
+    if !missing.is_empty() {
+        return Err(Error::BadRequest(format!(
+            "对象存储配置不完整，请补齐：{}",
+            missing.join(" / ")
+        )));
+    }
+
+    let endpoint = match provider {
+        MediaStorageProvider::R2 => {
+            build_r2_endpoint(&endpoint_or_account.clone().unwrap_or_default())
+        }
+        MediaStorageProvider::Minio => endpoint_or_account.clone().unwrap_or_default(),
+    };
+
+    Ok(Some(MediaStorageSettings {
+        provider: provider.clone(),
+        provider_name: match provider {
+            MediaStorageProvider::R2 => "r2".to_string(),
+            MediaStorageProvider::Minio => "minio".to_string(),
+        },
+        endpoint,
+        bucket: bucket.unwrap_or_default(),
+        public_base_url: normalize_public_base_url(public_base_url.unwrap_or_default()),
+        access_key_id: access_key_id.unwrap_or_default(),
+        secret_access_key: secret_access_key.unwrap_or_default(),
+        region: match provider {
+            MediaStorageProvider::R2 => "auto".to_string(),
+            MediaStorageProvider::Minio => "us-east-1".to_string(),
+        },
+        force_path_style: provider == MediaStorageProvider::Minio,
+    }))
+}
+
+pub async fn require_r2_settings(ctx: &AppContext) -> Result<MediaStorageSettings> {
+    optional_r2_settings(ctx)
+        .await?
+        .ok_or_else(|| Error::BadRequest("请先在后台配置媒体对象存储".to_string()))
+}
+
+async fn r2_client(settings: &MediaStorageSettings) -> Client {
+    let shared_config = aws_config::defaults(BehaviorVersion::latest())
+        .endpoint_url(settings.endpoint.clone())
+        .credentials_provider(Credentials::new(
+            settings.access_key_id.clone(),
+            settings.secret_access_key.clone(),
+            None,
+            None,
+            match settings.provider {
+                MediaStorageProvider::R2 => "r2",
+                MediaStorageProvider::Minio => "minio",
+            },
+        ))
+        .region(aws_sdk_s3::config::Region::new(settings.region.clone()))
+        .load()
+        .await;
+
+    let conf = aws_sdk_s3::config::Builder::from(&shared_config)
+        .force_path_style(settings.force_path_style)
+        .build();
+
+    Client::from_conf(conf)
+}
+
+fn build_public_url(settings: &MediaStorageSettings, key: &str) -> String {
+    format!(
+        "{}/{}",
+        settings.public_base_url,
+        key.trim_start_matches('/')
+    )
+}
+
+pub fn object_key_from_public_url(settings: &MediaStorageSettings, url: &str) -> Option<String> {
+    let normalized_base = settings.public_base_url.trim().trim_end_matches('/');
+    let normalized_url = url.trim();
+
+    if normalized_base.is_empty() || normalized_url.is_empty() {
+        return None;
+    }
+
+    normalized_url
+        .strip_prefix(normalized_base)
+        .map(|suffix| suffix.trim_start_matches('/').to_string())
+        .filter(|suffix| !suffix.is_empty())
+}
+
+pub fn build_object_key(prefix: &str, stem: &str, extension: &str) -> String {
+    let safe_prefix = prefix.trim_matches('/');
+    let safe_stem = slugify_segment(stem);
+    let safe_extension = extension
+        .trim()
+        .trim_start_matches('.')
+        .to_ascii_lowercase();
+    let object_name = format!(
+        "{}-{}.{}",
+        if safe_stem.is_empty() {
+            "asset".to_string()
+        } else {
+            safe_stem
+        },
+        Uuid::new_v4().simple(),
+        if safe_extension.is_empty() {
+            "bin".to_string()
+        } else {
+            safe_extension
+        },
+    );
+
+    if safe_prefix.is_empty() {
+        object_name
+    } else {
+        format!("{safe_prefix}/{object_name}")
+    }
+}
+
+async fn ensure_bucket_exists(client: &Client, settings: &MediaStorageSettings) -> Result<()> {
+    if client
+        .head_bucket()
+        .bucket(&settings.bucket)
+        .send()
+        .await
+        .is_ok()
+    {
+        return Ok(());
+    }
+
+    if settings.provider != MediaStorageProvider::Minio {
+        return Err(Error::BadRequest(format!(
+            "对象存储 bucket 不存在或不可访问：{}",
+            settings.bucket
+        )));
+    }
+
+    client
+        .create_bucket()
+        .bucket(&settings.bucket)
+        .send()
+        .await
+        .map_err(|error| Error::BadRequest(format!("自动创建 MinIO bucket 失败: {error}")))?;
+
+    Ok(())
+}
+
+pub async fn upload_bytes_to_r2(
+    ctx: &AppContext,
+    key: &str,
+    bytes: Vec<u8>,
+    content_type: Option<&str>,
+    cache_control: Option<&str>,
+) -> Result<StoredObject> {
+    let settings = require_r2_settings(ctx).await?;
+    let client = r2_client(&settings).await;
+    ensure_bucket_exists(&client, &settings).await?;
+
+    let mut request = client
+        .put_object()
+        .bucket(&settings.bucket)
+        .key(key)
+        .body(ByteStream::from(bytes));
+
+    if let Some(content_type) = content_type
+        .map(str::trim)
+        .filter(|value| !value.is_empty())
+    {
+        request = request.content_type(content_type);
+    }
+
+    if let Some(cache_control) = cache_control
+        .map(str::trim)
+        .filter(|value| !value.is_empty())
+    {
+        request = request.cache_control(cache_control);
+    }
+
+    request
+        .send()
+        .await
+        .map_err(|error| Error::BadRequest(format!("上传文件到对象存储失败: {error}")))?;
+
+    Ok(StoredObject {
+        key: key.to_string(),
+        url: build_public_url(&settings, key),
+    })
+}
+
+pub async fn delete_object(ctx: &AppContext, key: &str) -> Result<()> {
+    let settings = require_r2_settings(ctx).await?;
+    let client = r2_client(&settings).await;
+    client
+        .delete_object()
+        .bucket(&settings.bucket)
+        .key(key)
+        .send()
+        .await
+        .map_err(|error| Error::BadRequest(format!("删除对象存储文件失败: {error}")))?;
+    Ok(())
+}
+
+pub async fn delete_managed_url(ctx: &AppContext, url: &str) -> Result<bool> {
+    let Some(settings) = optional_r2_settings(ctx).await? else {
+        return Ok(false);
+    };
+    let Some(key) = object_key_from_public_url(&settings, url) else {
+        return Ok(false);
+    };
+    let client = r2_client(&settings).await;
+    client
+        .delete_object()
+        .bucket(&settings.bucket)
+        .key(&key)
+        .send()
+        .await
+        .map_err(|error| Error::BadRequest(format!("删除对象存储文件失败: {error}")))?;
+    Ok(true)
+}
+
+pub async fn list_objects(
+    ctx: &AppContext,
+    prefix: Option<&str>,
+    limit: i32,
+) -> Result<Vec<StoredObjectSummary>> {
+    let settings = require_r2_settings(ctx).await?;
+    let client = r2_client(&settings).await;
+    ensure_bucket_exists(&client, &settings).await?;
+
+    let mut request = client
+        .list_objects_v2()
+        .bucket(&settings.bucket)
+        .max_keys(limit.clamp(1, 1000));
+
+    if let Some(prefix) = prefix.map(str::trim).filter(|value| !value.is_empty()) {
+        request = request.prefix(prefix);
+    }
+
+    let result = request
+        .send()
+        .await
+        .map_err(|error| Error::BadRequest(format!("读取对象存储列表失败: {error}")))?;
+
+    Ok(result
+        .contents()
+        .iter()
+        .filter_map(|item| {
+            let key = item.key()?.to_string();
+            Some(StoredObjectSummary {
+                url: build_public_url(&settings, &key),
+                key,
+                size_bytes: item.size().unwrap_or_default(),
+                last_modified: item.last_modified().map(|ts| format!("{ts:?}")),
+            })
+        })
+        .collect())
+}
+
+pub async fn test_r2_connectivity(ctx: &AppContext) -> Result<String> {
+    let settings = require_r2_settings(ctx).await?;
+    let client = r2_client(&settings).await;
+    ensure_bucket_exists(&client, &settings).await?;
+    let healthcheck_key = format!(".healthchecks/{}.txt", Uuid::new_v4().simple());
+    client
+        .put_object()
+        .bucket(&settings.bucket)
+        .key(&healthcheck_key)
+        .body(ByteStream::from_static(b"termi-storage-ok"))
+        .content_type("text/plain")
+        .send()
+        .await
+        .map_err(|error| Error::BadRequest(format!("对象存储连接测试失败: {error}")))?;
+    client
+        .delete_object()
+        .bucket(&settings.bucket)
+        .key(&healthcheck_key)
+        .send()
+        .await
+        .map_err(|error| Error::BadRequest(format!("对象存储清理测试文件失败: {error}")))?;
+
+    Ok(settings.bucket)
+}