feat(web): dashboard compact — import pe Acasa, status cu bife, Trimiteri lizibile, Mapari complete (3.5)

Acasa = ecran de import (tab Import scos, ?tab=import->Acasa). Bara status
compacta pe 2 randuri cu bife accesibile (glife + text) + data formatata.
'Coada'->'Trimiteri': coloane RO, stare umana, detaliu la click in panou
dedicat. Mapari pe 3 sectiuni (de rezolvat / op salvate / formate coloane),
Cont doar cheie+creds. Filtrare Trimiteri, corectie inline needs_data cu
re-enqueue + detectie coliziune idempotency, badge contoare pe tab-uri.
Helper pur partajat payload_view.py (web + GET /v1/prezentari).
Backend trimitere (worker/idempotenta/mapping/schema) neatins. 483 teste.

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

app/web/templates/_preview_import.html

@@ -156,12 +156,15 @@
               {% elif row.flags %}
                 {{ row.flags[0] }}
               {% elif row.errors %}
-                {%- set e = row.errors[0] -%}
-                {%- if e is mapping -%}
-                  {{ e.values() | list | first }}
-                {%- else -%}
-                  {{ e }}
-                {%- endif -%}
+                {# US-008: arata MOTIVUL (mesajul de validare), nu numele campului #}
+                {%- for e in row.errors -%}
+                  {%- if e is mapping -%}
+                    {{ e.get('message') or e.get('msg') or (e.values() | list | first) }}
+                  {%- else -%}
+                    {{ e }}
+                  {%- endif -%}
+                  {%- if not loop.last %}; {% endif -%}
+                {%- endfor -%}
               {% endif %}
             </td>
             <td style="text-align:center;">
@@ -242,7 +245,8 @@
     </form>
 
     <div style="padding:8px 0 4px;">
-      <a href="/" class="muted" style="font-size:13px;">Incarca alt fisier</a>
+      <a href="#" class="muted" style="font-size:13px;"
+         hx-get="/_import/reset" hx-target="#import-section" hx-swap="outerHTML">Incarca alt fisier</a>
     </div>
 
   </div>