feat(5.16): aliniere lista/preview la mockup + fix lock seed la boot

Implementeaza planul aprobat din docs/raport-comparatie-mockup-5.16.md (T-1..T-9):

- T-1/T-8: rand lista 4->2 linii (placuta primar + cod RAR · operatie · data + pill),
  fallback placuta, eticheta-problema 10px->--fs-xs (_submissions.html, base.html)
- T-2: pill slim restilat fill-tint + dot 7px + text colorat per stare (base.html)
- T-3: bug 4a coliziune pill/vehicul in preview — col-stare 104->140px (base.html)
- T-4: preview 8->5 coloane (scos #, KM, Note; motivul -> title pe pill)
- T-5: titlu sectiune "Trimiterile tale" -> sr-only (a11y) + badge/export discret
- T-6: linia plan N/60 in corp doar pe avertizare; consum normal in badge+burger
- T-7: guard chenar gol chips extra (_chips_prestatii.html)
- T-9: "Anuleaza"->"Renunta"; nume operatie emfatic bold

Fix boot: init_db reincarca seedul de ~17k operatii (5.18) pe FIECARE pornire, pe
API + worker concurent -> "database is locked" la al doilea proces. Guard "_if_empty"
pe mapping_suggestions (ca seed_nomenclator_if_empty) -> boot rapid, fara cursa.

Teste actualizate (slim 2-linii, fallback placuta, plan in burger). TODOS.md:
defer trackuit (eroare HTMX lista, retokenizare px, diacritice).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

app/web/templates/_chips_prestatii.html

@@ -118,10 +118,13 @@
     {% endfor %}
 
     {# ===== US-005 (5.16): Chips extra + picker '+ Adauga alta operatie / cod RAR' in mod operatii ===== #}
-    {# Chips extra: cod_op_service gol, cod_prestatie setat — afisate flat cu × (reuse remove_flat) #}
+    {# Chips extra: cod_op_service gol, cod_prestatie setat — afisate flat cu × (reuse remove_flat).
+       T-7 (5.16): containerul .chips se randeaza DOAR cand exista chips extra — altfel ramanea
+       un chenar gol nefinisat sub randurile de operatie. #}
+    {% set _extra_chips = _chips | rejectattr('cod_op_service') | selectattr('cod_prestatie') | list %}
+    {% if _extra_chips %}
     <div class="chips" role="group" aria-label="Coduri RAR suplimentare" style="margin-top:4px;">
-      {% for chip in _chips %}
-      {% if not chip.cod_op_service and chip.cod_prestatie %}
+      {% for chip in _extra_chips %}
       {% set _is_warn_extra = chip.cod_prestatie in ('R-ODO', 'I-ODO') %}
       <span class="chip {% if _is_warn_extra %}chip-warn{% endif %}"
             aria-label="Cod RAR suplimentar {{ chip.cod_prestatie }}">
@@ -134,9 +137,9 @@
                 hx-vals='{"chips_action":"remove_flat","chips_remove_cod":"{{ chip.cod_prestatie }}"}'
                 aria-label="Sterge codul suplimentar {{ chip.cod_prestatie }}">&times;</button>
       </span>
-      {% endif %}
       {% endfor %}
     </div>
+    {% endif %}
     {% if nomenclator_rar %}
     <span style="display:inline-flex;align-items:center;gap:4px;margin-top:4px;">
       <select name="chips_add_cod_flat"