feat(quotes,units): official-invoice badge, conversion text wrapping, seeded fixed conversions, universal proforma, EditModal fixes

1) Quote card header: an official/unofficial badge (رسمی / غیررسمی) renders next to the supplier name from quotes.is_official (the «فاکتور رسمی» checkbox) — green for official, muted slate for unofficial.

2) Conversion Factors sidebar: the material group and variant labels no longer truncate with ellipsis — whitespace-normal + break-words so long Persian names wrap cleanly to the next line.

3) Global fixed conversions are now seeded in the unified seeder (app/db/init_db.py — the same file that seeds categories, base units and the superuser path), NOT hardcoded in the frontend: تن→کیلوگرم (1000), کیلوگرم→گرم (1000), هزار عدد→عدد (1000). The supporting units (گرم, هزار عدد) were added to the idempotent BASE_UNITS seed; inserts use ON CONFLICT (from_unit, to_unit) DO NOTHING against the uq_standard_conversion key so every startup is safe. Verified live: 3 rows after first boot AND still 3 rows after an api restart.

4) Universal proforma attachments: the Edit modal now has a پیش‌فاکتورها section (list/upload/delete via the existing MinIO-backed files API) alongside the invoices section, active at every quote lifecycle stage — including accepted/arrived and receipts-locked quotes (the section is deliberately not gated by hasReceipts; the backend already permits uploads in any status). View/delete of existing proformas unchanged elsewhere.

5) EditModal fixes: (a) the supplier Combobox no longer opens on mount — Radix Dialog autofocus was triggering its onFocus; Combobox gains an openOnFocus prop (default true) and the modal passes false, so the dropdown now opens only on explicit click or typing; (b) the line-item material field binds to the material's own name (m.name) instead of its category relation, and the save path matches materials by name+brand+specs accordingly.

Validated: python compile, api + frontend image builds (tsc + vite) clean; seeding verified against the live local DB.

frontend/src/pages/Units/UnitsPage.tsx

@@ -496,7 +496,7 @@ export function UnitsPage() {
                               )}
                             />
                           )}
-                          <span className="truncate">{g.base}</span>
+                          <span className="whitespace-normal break-words text-start">{g.base}</span>
                         </span>
                         <span className="ut-ref">{hasChildren ? faNum(g.variants.length) : g.repRef || "—"}</span>
                       </button>
@@ -519,7 +519,7 @@ export function UnitsPage() {
                                   )}
                                   onClick={() => setMaterialId(v.id)}
                                 >
-                                  <span className="truncate">{v.label}</span>
+                                  <span className="whitespace-normal break-words text-start">{v.label}</span>
                                   <span className="ut-ref">{v.refUnit || "—"}</span>
                                 </button>
                               ))}