feat(web): editare celule in preview + Acasa unificata (PRD 3.6)

Implementeaza PRD 3.6 (US-001..007), pe canalul de import + stratul web;
worker / masina stari / idempotenta / mapare raman neatinse.

- US-003/004: tab-ul "Trimiteri" eliminat; Trimiterile devin sectiune
  permanenta sub upload pe Acasa ("Trimiterile tale"); upload comprimat la
  bara slim (hero pastrat la first-run); ?tab=coada si /_fragments/coada
  servesc Acasa (fara fragment orfan); poll gated pe visibilityState.
- US-001: coloana noua import_rows.override_json (nullable, Fernet, Approach B)
  + _migrate defensiv; ruta v1 + alias web .../rand/{i}/editeaza aplica patch
  canonic ULTIMUL in _resolve_row_for_preview si commit_import (mutatie pura,
  status rederivat, fara drift). Scoping JOIN -> 404, guard committed -> 409,
  semantica empty=clear, decrypt fail -> no-op.
- US-002: buton "Editeaza" pe rand; swap pe <tr> + OOB contoare (nu pe sectiune);
  form propriu (confirm dezactivat la editare); refoloseste grila responsiva +
  error-map din _trimitere_detaliu.html; mutual-exclusion intre randuri.
- US-005/006: "De rezolvat", "Operatii salvate" si "Formate de coloane" ca
  tabele (.tablewrap); H4: comutatorul reflecta auto_send STOCAT.
- US-007: bifa "auto-send" devine comutator etichetat pe COADA ("Pune automat
  in coada" / "Tine pentru verificare"), scoped pe operatie; name="auto_send"
  pastrat (semantica de prezenta -> bool corect cu ambele parsere, zero backend).

Fix-uri gasite la verificarea E2E in browser (htmx 1.9.12, JS — invizibile la
TestClient): useTemplateFragments=true (raspuns <tr>+OOB era parsat in context
de tabel -> swapError + contoare pierdute); re-activarea confirm-btn dupa salvare
deferita pe tick (evita editing=true tranzitoriu); n-hint actualizat de updateN.

Teste: 523 passed. E2E browser: Acasa unificata, upload slim, editare rand
(needs_data -> ok, swap pe rand, contoare OOB), Mapari tabelar + comutator.

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

app/web/templates/_upload.html

@@ -1,7 +1,8 @@
 <div id="import-section">
   {% set pas = 1 %}{% include '_stepper.html' %}
-  <div class="card">
-    <h2 style="font-size:15px; margin:0 0 12px;">Import fisier (xlsx / csv)</h2>
+  {# US-004 (3.6): bara de upload accentuata (border de accent) ca sa ramana punctul
+     de intrare evident chiar cu tabelul Trimiteri lung dedesubt (D-1.1/D-5.2). #}
+  <div class="card" style="border-color:var(--accent);">
 
     {% if message %}
     <div class="flash" style="margin-bottom:12px;">{{ message }}</div>
@@ -40,6 +41,26 @@
       </div>
       {% endif %}
 
+      {% if are_trimiteri and not sheets %}
+      {# === Bara slim (returning user): eticheta + buton + zona de trage, pe un rand === #}
+      <div class="drop-zone" id="drop-zone"
+           role="region" aria-label="Zona de incarcare fisier"
+           style="display:flex; align-items:center; gap:14px; flex-wrap:wrap;
+                  padding:12px 16px; text-align:left;">
+        <strong style="font-size:14px;">Importa:</strong>
+        <input id="file-input" type="file" name="file" accept=".xlsx,.xls,.csv"
+               style="display:none;" aria-label="Selecteaza fisier xlsx sau csv">
+        <button type="button" id="upload-btn"
+                style="min-height:44px; padding:10px 20px; font-size:14px;">
+          Alege fisier (xlsx/csv)
+        </button>
+        <span class="muted" style="font-size:13px;">sau trage aici</span>
+        <span class="muted" style="font-size:12px; margin-left:auto;">
+          NU se trimite nimic la RAR pana confirmi.
+        </span>
+      </div>
+      {% else %}
+      {# === Hero first-run (sau re-upload multi-foaie): pastreaza copy-ul de bun venit === #}
       <div class="drop-zone" id="drop-zone"
            role="region" aria-label="Zona de incarcare fisier">
         {% if not sheets %}
@@ -55,13 +76,14 @@
                style="display:none;" aria-label="Selecteaza fisier xlsx sau csv">
         <button type="button" id="upload-btn"
                 style="min-height:44px; padding:10px 24px; font-size:14px;">
-          Alege fisier
+          Alege fisier (xlsx/csv)
         </button>
       </div>
 
       <p class="muted" style="margin:8px 0 0; font-size:12px;">
         NU se trimite nimic la RAR pana confirmi explicit.
       </p>
+      {% endif %}
 
       <span id="upload-spinner" class="htmx-indicator muted"
             style="font-size:13px; margin-top:6px; display:inline;">
@@ -77,6 +99,17 @@
   var fi  = document.getElementById('file-input');
   var dz  = document.getElementById('drop-zone');
   var frm = document.getElementById('upload-form');
+
+  /* US-003 (3.6): un singur sticky bar pe ecran — cand re-apare zona de upload
+     (reset sau dupa commit), sectiunea Trimiteri redevine vizibila. */
+  var trim = document.getElementById('trimiteri-section');
+  if (trim) trim.style.display = '';
+
+  /* Dupa un commit reusit (mesaj de succes), du utilizatorul la Trimiteri. */
+  {% if message and not error %}
+  if (trim) trim.scrollIntoView({behavior: 'smooth', block: 'start'});
+  {% endif %}
+
   if (!btn || !fi || !frm) return;
 
   btn.addEventListener('click', function() { fi.click(); });