fix: expire orphaned initial progress after 2 min + add has_data to catalog

- If host agent never picks up an install request, the initial progress
  file (written by dashboard-api) stays at "pulling" with started_at ==
  updated_at. After 2 min, treat as stale so extension stops showing
  "installing" and falls through to normal status.
- Add has_data field to catalog response so UI can hide purge button
  when there's no data directory to purge.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: yasinBursali

dream-server/extensions/services/dashboard-api/routers/extensions.py

@@ -104,7 +104,14 @@ def _compute_extension_status(ext: dict, services_by_id: dict) -> str:
     if progress:
         ps = progress.get("status", "")
         if ps in ("pulling", "starting"):
-            return "installing"
+            # If the progress was never updated by the host agent (started_at == updated_at)
+            # and is older than 2 min, the agent likely never picked it up — ignore.
+            started = progress.get("started_at", "")
+            updated = progress.get("updated_at", "")
+            if started == updated and _is_stale(updated, max_age_seconds=120):
+                pass  # fall through to normal status logic
+            else:
+                return "installing"
         if ps == "setup_hook":
             return "setting_up"
         if ps == "error":
@@ -507,7 +514,8 @@ async def extensions_catalog(
         ext_id = ext["id"]
         user_dir = USER_EXTENSIONS_DIR / ext_id
         source = "user" if user_dir.is_dir() else ("core" if ext_id in SERVICES else "library")
-        enriched = {**ext, "status": status, "installable": installable, "source": source}
+        has_data = (Path(DATA_DIR) / ext_id).is_dir()
+        enriched = {**ext, "status": status, "installable": installable, "source": source, "has_data": has_data}
 
         if category and ext.get("category") != category:
             continue