feat(5.19): auto-send toggle per cont + tinere manuala randuri (held)

Comutator accounts.auto_send_enabled per cont: Auto OFF (default) tine randurile
la ingestie (submissions.held=1), worker-ul (claim_one AND held=0) le sare pana la
eliberare umana (per rand/bulk/auto-release OFF->ON). Snapshot held prin chokepoint
unic held_for_account pe toate caile de ingestie (API, import, reresolve, reactivare).

- schema/migrare: coloana held + index partial idx_submissions_held; auto_send_enabled
- API: echo onest held+motiv (US-010), ruta /prezentari/{id}/trimite-acum
- web: toggle header, modal confirmare tipata, buton Trimite per rand + Trimite toate,
  banner coada tinuta imbatranita (L.142), contor "In asteptare (manual)"
- worker: expire_held (US-008, inchide gaura retentie PII), metrics held gauges
- ops: tools/carantina_held + runbook rollback (R4)

Nota review (/code-review high): re-snapshot held lipseste pe caile repune/corectie
(requeue_submission, post_corectie, bulk-fix) — de aliniat separat cu create_prezentari.

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

app/web/templates/_submissions.html

@@ -136,13 +136,33 @@
         {% endif %}
       </div>
 
-      {# Zona dreapta: pill stare + badge mediu RAR (US-010 PRD 5.20) #}
+      {# Zona dreapta: pill stare + badge mediu RAR (US-010 PRD 5.20) + buton Trimite (US-005) #}
       <div style="flex:0 0 auto; display:flex; flex-direction:column; align-items:flex-end; gap:3px; white-space:nowrap;">
         <span class="pill {{ r.stare_css }}" title="{{ r.stare_text }}">{{ r.stare_scurt }}</span>
         {% if r.rar_env %}
         {% set _eb = eticheta_env(r.rar_env) %}
         <span class="{{ _eb[1] }}">{{ _eb[0] }}</span>
         {% endif %}
+        {# US-005 (PRD 5.19 / D6): buton "Trimite" DOAR pe randurile tinute (queued AND held=1).
+           Afordanta dedicata cu stopPropagation (randul e role=button) — NU declanseaza modalul
+           de detaliu. Confirmare 1-linie prin hx-confirm (per rand); ireversibilitate in microcopy. #}
+        {% if r.tinut %}
+        <form hx-post="/trimitere/{{ r.id }}/trimite-acum"
+              hx-target="#submissions-wrap" hx-swap="innerHTML"
+              hx-confirm="Trimit aceasta prezentare la RAR? Declararea este ireversibila (FINALIZATA)."
+              onclick="event.stopPropagation();"
+              onkeydown="event.stopPropagation();"
+              style="margin:0;">
+          <input type="hidden" name="csrf_token" value="{{ csrf_token }}">
+          <button type="submit" class="btn-trimite-rand"
+                  onclick="event.stopPropagation();"
+                  style="margin-top:2px; padding:2px 10px; font-size:var(--fs-xs);
+                         border:1px solid var(--accent); border-radius:99px; cursor:pointer;
+                         background:var(--accent); color:#fff; font-weight:600;">
+            Trimite
+          </button>
+        </form>
+        {% endif %}
       </div>
     </li>
   {% endfor %}