fix: three bugs from re-index logs

1. UUID format mismatch in delete_stale_chunks: _stable_id() returns
MD5 hex without dashes, but Qdrant returns scrolled IDs in UUID format
with dashes. Normalize both sides by stripping dashes before comparing,
so freshly-upserted chunks are never incorrectly classified as stale.
(Root cause of '625 upserted → 622 deleted → 0 stored' in logs.)

2. Cerebras model name: 'llama-3.3-70b' → 'llama3.3-70b' (matching
Cerebras API slug format, consistent with old 'llama3.1-8b').

3. Re-index button glow: add 'done-glow' CSS class with a 3s blue pulse
animation on the ⟳ icon when re-index completes successfully.

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

backend/services/generation.py

@@ -287,7 +287,7 @@ class GenerationService:
             # llama-3.3-70b produces dramatically better context sentences than
             # llama3.1-8b for structured tasks like "describe what this chunk does in
             # one sentence". Both are on Cerebras free tier.
-            self._model  = "llama-3.3-70b"
+            self._model  = "llama3.3-70b"
             print("Generation: using Cerebras (llama-3.3-70b) — fast free tier")
             return "cerebras"
         elif settings.anthropic_api_key:
@@ -336,7 +336,7 @@ class GenerationService:
                 api_key=settings.cerebras_api_key,
                 base_url="https://api.cerebras.ai/v1",
             )
-            self._model   = "llama-3.3-70b"
+            self._model   = "llama3.3-70b"
             self.provider = "cerebras"
             print("Generation: Gemma 4 limit hit — switched to Cerebras (llama-3.3-70b)")
             return True

ingestion/qdrant_store.py

@@ -483,8 +483,13 @@ class QdrantStore:
             if offset is None:
                 break
 
-        # Stale = in old index but not in new set
-        stale = [id_ for id_ in old_ids if id_ not in keep_ids]
+        # Normalize both sides before comparing.
+        # _stable_id() returns a 32-char MD5 hex string (no dashes).
+        # Qdrant stores UUIDs internally and returns them with dashes when scrolled
+        # (e.g. "a1b2c3d4-e5f6-a7b8-c9d0-e1f2a3b4c5d6"). Strip dashes on both
+        # sides so the comparison works regardless of formatting.
+        normalized_keep = {k.replace("-", "") for k in keep_ids}
+        stale = [id_ for id_ in old_ids if id_.replace("-", "") not in normalized_keep]
         if not stale:
             return 0
 

ui/src/components/Sidebar.jsx

@@ -566,7 +566,7 @@ export default function Sidebar({ repos, reposLoading, activeRepo, onSelectRepo,
                     )}
                     {/* Re-index button — one click re-ingests from scratch */}
                     <button
-                      className={`repo-reindex${isReindexingThis ? " spinning" : ""}`}
+                      className={`repo-reindex${isReindexingThis ? " spinning" : ""}${justDone ? " done-glow" : ""}`}
                       onClick={(e) => handleReindex(e, r.slug)}
                       disabled={!!reindexing}
                       title={isReindexingThis ? "Re-indexing…" : "Re-index with contextual retrieval — adds AI-generated descriptions to key chunks before embedding, improving search precision"}

ui/src/index.css

@@ -3353,6 +3353,17 @@ textarea:focus-visible {
   from { transform: rotate(0deg); }
   to   { transform: rotate(360deg); }
 }
+/* Glow pulse on the re-index button after a successful re-index.
+   Fades over 3s (matching the reindexDone timeout in Sidebar.jsx). */
+.repo-reindex.done-glow {
+  color: var(--accent-soft);
+  animation: reindex-done-pulse 3s ease-out forwards;
+}
+@keyframes reindex-done-pulse {
+  0%   { color: var(--accent-soft); text-shadow: 0 0 8px var(--accent), 0 0 16px var(--accent-glow); }
+  40%  { color: #fff;               text-shadow: 0 0 12px var(--accent), 0 0 24px var(--accent-glow); }
+  100% { color: var(--muted);       text-shadow: none; }
+}
 
 /* Re-index progress bar — sits flush at the bottom of the repo card */
 .repo-reindex-progress {