feat: show tag counts alongside doc counts on dashboard

Fetch /api/tags/ in parallel with /api/documents/ for each instance.
Dashboard now displays "X docs, Y tags" per master/replica.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

app/api/status.py

@@ -89,13 +89,13 @@ def get_status(session: Session = Depends(get_session)):
     }
 
 
-async def _fetch_count(url: str, token: str) -> int | None:
+async def _fetch_count(url: str, token: str, path: str = "/api/documents/") -> int | None:
     import httpx
     try:
         async with httpx.AsyncClient(
             headers={"Authorization": f"Token {token}"}, timeout=8.0
         ) as client:
-            r = await client.get(url.rstrip("/") + "/api/documents/", params={"page_size": 1})
+            r = await client.get(url.rstrip("/") + path, params={"page_size": 1})
             r.raise_for_status()
             return r.json().get("count")
     except Exception:

app/ui/routes.py

@@ -70,12 +70,19 @@ async def doc_counts_fragment(request: Request, session: Session = Depends(get_s
         token = decrypt(r.api_token, config.secret_key)
         tasks.append((r.name, r.url, token))
 
-    counts_raw = await asyncio.gather(*[_fetch_count(url, tok) for _, url, tok in tasks])
+    n = len(tasks)
+    all_counts = await asyncio.gather(
+        *[_fetch_count(url, tok) for _, url, tok in tasks],
+        *[_fetch_count(url, tok, "/api/tags/") for _, url, tok in tasks],
+    )
+    doc_counts = all_counts[:n]
+    tag_counts = all_counts[n:]
 
     parts = []
-    for (label, _, _), count in zip(tasks, counts_raw):
-        val = str(count) if count is not None else "?"
-        parts.append(f"<span><strong>{label}:</strong> {val} docs</span>")
+    for (label, _, _), docs, tags in zip(tasks, doc_counts, tag_counts):
+        doc_val = str(docs) if docs is not None else "?"
+        tag_val = str(tags) if tags is not None else "?"
+        parts.append(f"<span><strong>{label}:</strong> {doc_val} docs, {tag_val} tags</span>")
 
     html = (
         '<div style="display:flex; gap:1.5rem; flex-wrap:wrap; margin-bottom:1rem; font-size:0.95em;">'