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/schema.sql

@@ -200,6 +200,42 @@ CREATE TABLE IF NOT EXISTS operation_text_rules (
 );
 CREATE INDEX IF NOT EXISTS idx_text_rules_account ON operation_text_rules(account_id);
 
+-- Sugestii de mapare (strat SILVER, L14-S3 PRD 5.14).
+-- Etichete LLM/embedding — bootstrap; citita DOAR de suggest_codes/pending_unmapped,
+-- NICIODATA de load_mapping/resolve_prestatii (separare structurala #13).
+-- Cheia = denumire normalizata (fara diacritice, uppercase, spatii colapsate).
+-- is_nul=1: non-operatie (ITP, discount, nr. inmatriculare) -> suprima (#4), cod NULL.
+-- INSERT OR IGNORE la re-seed: nu suprascrie randuri existente (#2).
+CREATE TABLE IF NOT EXISTS mapping_suggestions (
+    id                   INTEGER PRIMARY KEY AUTOINCREMENT,
+    denumire_normalizata TEXT NOT NULL UNIQUE,
+    cod_prestatie        TEXT,                   -- NULL cand is_nul=1 (supresie)
+    is_nul               INTEGER NOT NULL DEFAULT 0 CHECK (is_nul IN (0, 1)),
+    source               TEXT NOT NULL,          -- 'llm', 'embedding', etc. (#5)
+    confidence           REAL NOT NULL DEFAULT 0.0 CHECK (confidence >= 0.0 AND confidence <= 1.0),
+    created_at           TEXT NOT NULL DEFAULT (datetime('now')),
+    updated_at           TEXT NOT NULL DEFAULT (datetime('now'))
+);
+CREATE INDEX IF NOT EXISTS idx_mapping_suggestions_cod
+    ON mapping_suggestions(cod_prestatie) WHERE cod_prestatie IS NOT NULL;
+
+-- Mapari validate de oameni (strat GOLD partajat cross-account, L14-S3 PRD 5.14).
+-- Confirmarile umane din ORICE cont contribuie la acest store (#8).
+-- cross-account = suggestion-only (pre-completeaza editorul, F-A/#11), NU auto-send.
+-- Auto-send DOAR din operations_mapping (GOLD propriu per-cont, Eng-F2).
+-- Cheia = denumire_normalizata (NU cod_op_service: spatii de chei diferite, #14).
+CREATE TABLE IF NOT EXISTS shared_mappings (
+    id                   INTEGER PRIMARY KEY AUTOINCREMENT,
+    denumire_normalizata TEXT NOT NULL UNIQUE,
+    cod_prestatie        TEXT NOT NULL,          -- cod RAR valid (GOLD = validat de om)
+    source               TEXT NOT NULL DEFAULT 'human',  -- 'human', 'human_import' (#5)
+    provenance           TEXT,                   -- detalii: cont, email, batch (#5)
+    confidence           REAL NOT NULL DEFAULT 1.0,
+    confirmations        INTEGER NOT NULL DEFAULT 1,  -- contor confirmari din orice cont
+    created_at           TEXT NOT NULL DEFAULT (datetime('now')),
+    updated_at           TEXT NOT NULL DEFAULT (datetime('now'))
+);
+
 -- Heartbeat worker (un singur rand, id=1). /healthz citeste de aici.
 CREATE TABLE IF NOT EXISTS worker_heartbeat (
     id                  INTEGER PRIMARY KEY CHECK (id = 1),