feat: add shadcn admin workspace

README.md

@@ -6,8 +6,9 @@ Monorepo for the Termi blog system.
 
 ```text
 .
+├─ admin/      # React + shadcn admin workspace
 ├─ frontend/   # Astro blog frontend
-├─ backend/    # Loco.rs backend and admin
+├─ backend/    # Loco.rs backend APIs and legacy Tera admin
 ├─ mcp-server/ # Streamable HTTP MCP server for articles/categories/tags
 ├─ .codex/     # Codex workspace config
 └─ .vscode/    # Editor workspace config
@@ -41,6 +42,12 @@ Only backend:
 .\dev.ps1 -BackendOnly
 ```
 
+Only admin:
+
+```powershell
+.\dev.ps1 -AdminOnly
+```
+
 Only MCP:
 
 ```powershell
@@ -52,6 +59,7 @@ Direct scripts:
 ```powershell
 .\start-frontend.ps1
 .\start-backend.ps1
+.\start-admin.ps1
 .\start-mcp.ps1
 ```
 
@@ -63,6 +71,14 @@ npm install
 npm run dev
 ```
 
+### Admin
+
+```powershell
+cd admin
+npm install
+npm run dev
+```
+
 ### Backend
 
 ```powershell