feat(5.15+5.14): CLOSE — fix-uri code-review + embeddings functional

5.15 (propagare design + dashboard editare) si 5.14 (mapare LLM distilata)
inchise dupa /code-review high. 8 buguri reparate TDD:

- HIGH modal nu se deschidea pe randul slim (base.html: trimitere-slim)
- HIGH /repune trunchia prestatii (declaratie incompleta la RAR) -> iterare
  peste existing, codes pozitional
- HIGH embeddings incarca model ~230MB degeaba pe corpus gol -> poarta has_corpus()
- HIGH picker chips gol pe re-render eroare -> conn/account_id pe toate ramurile
- MED obs re-derivat dupa stergere explicita -> _merge_override pastreaza obs=''
- MED mapare salvata fara denumire poluă GOLD -> _record_gold_validation guard
- MED typo nome_prestatie -> nume_prestatie in select /repune
- MED bucketare timp +3h gresita iarna -> SQLite localtime + TZ=Europe/Bucharest

Embeddings WIRE-uit functional (PRD #15, decizie user): ensure_embeddings_corpus
construieste corpus din nomenclator, gated pe AUTOPASS_EMBEDDINGS_ENABLED (default
off). Marime model corectata ~50MB->~230MB (estimare PRD gresita).

Cleanup: hoist load_* din bucla bulk-fix; import re la top.
Regresie: 1256 passed, 1 deselected (live), 0 failed.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

app/config.py

@@ -104,6 +104,13 @@ class Settings(BaseSettings):
     worker_retry_max_s: int = 300
     worker_max_retries: int = 8           # peste atat -> error + banner
 
+    # --- Embeddings (sugestie mapare, Stratul 2 PRD 5.14) ---
+    # DEZACTIVAT implicit: prima folosire lazy-load-eaza modelul fastembed/ONNX
+    # (~230MB pe disc) sincron in thread-ul de cerere -> hang la prima cerere /mapari.
+    # Activeaza explicit in productie (start.sh/Docker/.env) cand vrei sugestii semantice.
+    # OFF pastreaza suita de teste rapida si /mapari instant (cade pe GOLD/SILVER+fuzzy).
+    embeddings_enabled: bool = False
+
     @property
     def rar_base_url(self) -> str:
         return self.rar_base_url_prod if self.rar_env == "prod" else self.rar_base_url_test