fix: Home → /workspaces, workspace name from cookie, CRUD + CSRF

- Home button now links to /workspaces (universal workspace page)
- Sidebar workspace section shows active workspace name from cookie
- _sidebar_data reads flowdeck_workspace cookie for active_ws_name
- local-workspace APIs filter by workspace_id (not global)
- newPageInWorkspace() JS function added to sidebar
- CSRF exemption for /api/local-workspace routes

app/middleware/csrf.py

@@ -16,7 +16,7 @@ class CSRFMiddleware(BaseHTTPMiddleware):
     """
 
     SAFE_METHODS = {"GET", "HEAD", "OPTIONS"}
-    EXCLUDED_PATHS = {"/api/webhook", "/api/v1", "/auth/callback", "/auth/register", "/auth/local-login", "/api/user", "/board/api/pages", "/board/api/favorites", "/api/workspace", "/db/", "/workspace"}
+    EXCLUDED_PATHS = {"/api/webhook", "/api/v1", "/auth/callback", "/auth/register", "/auth/local-login", "/api/user", "/board/api/pages", "/board/api/favorites", "/api/workspace", "/api/local-workspace", "/db/", "/workspace"} 
 
     async def dispatch(self, request: Request, call_next):
         # Webhook receiver, OAuth callback, and internal API are exempt