feat: auto-create local workspace mirror for Gitea projects

- Opening /gitea-workspace auto-creates a local workspace with same name
- New Page/New Folder in remote context → saves to local mirror workspace
- Sidebar stays focused on remote workspace (🔗 icon, remote tree)
- local_ws_id passed to Alpine for API calls
- /api/local-workspace/items accepts workspace_id in body

app/routers/dashboard.py

@@ -113,10 +113,25 @@ def _sidebar_data(request: Request, repos: list[dict]) -> dict:
         except Exception:
             pass
 
+    # Get local workspace ID for Gitea workspace mirror
+    local_ws_id = 0
+    if gitea_workspace and gitea_owner and gitea_repo:
+        try:
+            with get_conn() as conn:
+                row = conn.execute(
+                    "SELECT id FROM workspaces WHERE owner_id=? AND name=? AND settings_json LIKE ?",
+                    (user["id"], f"{gitea_owner}/{gitea_repo}", "%gitea_repo%")
+                ).fetchone()
+                if row:
+                    local_ws_id = row["id"]
+        except Exception:
+            pass
+
     return {
         "workspace_name": ws, "workspace_initial": initial,
         "active_ws_name": active_ws_name,
         "workspace_key": f"{gitea_owner}/{gitea_repo}" if gitea_workspace else "",
+        "local_ws_id": local_ws_id,
         "workspace_pages": workspace_pages,
         "gitea_workspace": gitea_workspace,
         "current_page": "Dashboard", "last_edited": "now",
@@ -385,6 +400,27 @@ async def gitea_workspace_page(request: Request):
     repo = request.query_params.get("repo", "")
     ws_key = f"{owner}/{repo}" if owner and repo else ""
     ws_name = ws_key or "Gitea Workspace"
+    # Auto-create local workspace mirror for storing local files
+    local_ws_id = None
+    if ws_key:
+        with get_conn() as conn:
+            existing = conn.execute(
+                "SELECT id, owner_id FROM workspaces WHERE owner_id=? AND name=? AND settings_json LIKE ?",
+                (user["id"], ws_key, "%gitea_repo%")
+            ).fetchone()
+            if existing:
+                local_ws_id = existing["id"]
+            else:
+                c = conn.execute(
+                    "INSERT INTO workspaces (name, owner_id, settings_json) VALUES (?, ?, ?)",
+                    (ws_key, user["id"], json.dumps({"gitea_repo": ws_key, "gitea_owner": owner}))
+                )
+                local_ws_id = c.lastrowid
+                conn.execute(
+                    "INSERT INTO workspace_members (workspace_id, user_id, role) VALUES (?, ?, ?)",
+                    (local_ws_id, user["id"], "admin")
+                )
+                conn.commit()
     ctx = {
         **sidebar,
         "user": user,
@@ -394,6 +430,7 @@ async def gitea_workspace_page(request: Request):
         "workspace_initial": repo[0].upper() if repo else "G",
         "owner": owner,
         "repo": repo,
+        "local_ws_id": local_ws_id or 0,
     }
     template = env.get_template("gitea_workspace.html")
     resp = HTMLResponse(content=template.render(**ctx))
@@ -726,14 +763,16 @@ async def create_local_workspace_item(request: Request):
     name = body.get("name", "Untitled").strip()
     item_type = body.get("type", "page")
     parent_id = body.get("parent_id")
+    explicit_ws_id = body.get("workspace_id")
     ws = _get_active_workspace(request)
-    ws_id = ws["id"] if ws else None
+    ws_id = explicit_ws_id or (ws["id"] if ws else None)
+    ws_key = ws["workspace_key"] if ws and not explicit_ws_id else ""
     section = 'Workspace' if item_type == 'folder' else 'Private'
     with get_conn() as conn:
         cursor = conn.execute(
             "INSERT INTO pages (workspace, workspace_id, title, content, content_format, parent_section, parent_id) "
-            "VALUES ('', ?, ?, '', 'blocks', ?, ?)",
-            (ws_id, name, section, parent_id),
+            "VALUES (?, ?, ?, '', 'blocks', ?, ?)",
+            (ws_key, ws_id, name, section, parent_id)
         )
         conn.commit()
         pid = cursor.lastrowid