feat(users): implement full user management CRUD

API endpoints (app/api/v1/admin/users.py):
- GET /users: Paginated list with search and filters
- POST /users: Create new user
- GET /users/{id}: Get user details with related counts
- PUT /users/{id}: Update user information
- PUT /users/{id}/status: Toggle active status
- DELETE /users/{id}: Delete user (with ownership check)

Pydantic schemas (models/schema/auth.py):
- UserCreate: For creating new users
- UserUpdate: For updating user information
- UserDetailResponse: Extended user details with counts
- UserListResponse: Paginated list response

Frontend:
- Updated users.html with server-side pagination and filters
- New user-create.html/js for user creation form
- New user-detail.html/js for viewing user details
- New user-edit.html/js for editing users

Routes added for user create, detail, and edit pages.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

app/routes/admin_pages.py

@@ -387,6 +387,68 @@ async def admin_users_page(
     )
 
 
+@router.get("/users/create", response_class=HTMLResponse, include_in_schema=False)
+async def admin_user_create_page(
+    request: Request,
+    current_user: User = Depends(get_current_admin_from_cookie_or_header),
+    db: Session = Depends(get_db),
+):
+    """
+    Render user creation form.
+    """
+    return templates.TemplateResponse(
+        "admin/user-create.html",
+        {
+            "request": request,
+            "user": current_user,
+        },
+    )
+
+
+@router.get(
+    "/users/{user_id}", response_class=HTMLResponse, include_in_schema=False
+)
+async def admin_user_detail_page(
+    request: Request,
+    user_id: int = Path(..., description="User ID"),
+    current_user: User = Depends(get_current_admin_from_cookie_or_header),
+    db: Session = Depends(get_db),
+):
+    """
+    Render user detail view.
+    """
+    return templates.TemplateResponse(
+        "admin/user-detail.html",
+        {
+            "request": request,
+            "user": current_user,
+            "user_id": user_id,
+        },
+    )
+
+
+@router.get(
+    "/users/{user_id}/edit", response_class=HTMLResponse, include_in_schema=False
+)
+async def admin_user_edit_page(
+    request: Request,
+    user_id: int = Path(..., description="User ID"),
+    current_user: User = Depends(get_current_admin_from_cookie_or_header),
+    db: Session = Depends(get_db),
+):
+    """
+    Render user edit form.
+    """
+    return templates.TemplateResponse(
+        "admin/user-edit.html",
+        {
+            "request": request,
+            "user": current_user,
+            "user_id": user_id,
+        },
+    )
+
+
 # ============================================================================
 # IMPORT MANAGEMENT ROUTES
 # ============================================================================