Fix recipe listing, effects count, and add nav counts to all pages

- Fix list_by_type to return node_id (IPFS CID) instead of local hash
- Fix effects count on home page (count from _effects/ directory)
- Add nav_counts to all page templates (recipes, effects, runs, media, storage)
- Add editable metadata section to cache/media detail page
- Show more metadata on recipe detail page (ID, IPFS CID, step count)
- Update tests for new list_by_type behavior

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

app/routers/home.py

@@ -66,9 +66,14 @@ async def home(request: Request):
         except Exception:
             pass
         try:
+            # Effects are stored in _effects/ directory, not in cache
+            from pathlib import Path
             from ..dependencies import get_cache_manager
-            effects = get_cache_manager().list_by_type('effect')
-            stats["effects"] = len(effects)
+            effects_dir = Path(get_cache_manager().cache_dir) / "_effects"
+            if effects_dir.exists():
+                stats["effects"] = len([d for d in effects_dir.iterdir() if d.is_dir()])
+            else:
+                stats["effects"] = 0
         except Exception:
             pass