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.

backend/app/db/init_db.py

@@ -345,6 +345,18 @@ BASE_UNITS: list[dict] = [
     {"code": "m", "name_fa": "متر", "dimension": "length", "si_factor": 1, "is_base": True},
     {"code": "bag", "name_fa": "کیسه", "dimension": "count", "si_factor": 1, "is_base": False},
     {"code": "ton", "name_fa": "تن", "dimension": "mass", "si_factor": 1000, "is_base": False},
+    {"code": "g", "name_fa": "گرم", "dimension": "mass", "si_factor": 0.001, "is_base": False},
+    {"code": "kpiece", "name_fa": "هزار عدد", "dimension": "count", "si_factor": 1000, "is_base": False},
+]
+
+# تبدیل‌های ثابت جهانی («تبدیل‌های ثابت — همه متریال‌ها») — ضرایب استاندارد و
+# فراگیر که در هر استارت‌آپ به‌صورت idempotent ذخیره می‌شوند. کلید یکتا:
+# (from_unit, to_unit)؛ مقدار فیلدها، نام نمایشی فارسی واحد است — همان
+# قالبی که فرانت‌اند در standard_conversions می‌نویسد.
+STANDARD_CONVERSIONS: list[dict] = [
+    {"from_unit": "تن", "to_unit": "کیلوگرم", "factor": 1000},
+    {"from_unit": "کیلوگرم", "to_unit": "گرم", "factor": 1000},
+    {"from_unit": "هزار عدد", "to_unit": "عدد", "factor": 1000},
 ]
 
 
@@ -379,6 +391,14 @@ async def ensure_v26(engine: AsyncEngine) -> None:
             "VALUES (:code, :name_fa, :dimension, :si_factor, :is_base) ON CONFLICT (code) DO NOTHING",
             u,
         )
+    # Seed the global fixed conversions (idempotent — unique key from/to unit).
+    for c in STANDARD_CONVERSIONS:
+        await run_statement(
+            "INSERT INTO standard_conversions (from_unit, to_unit, factor) "
+            "VALUES (:from_unit, :to_unit, :factor) "
+            "ON CONFLICT (from_unit, to_unit) DO NOTHING",
+            c,
+        )
     # v2.5/v2.6 category decoupling from materials: drop trigger, function, and column.
     await run_statement("DROP TRIGGER IF EXISTS trg_supplier_materials_derive_category ON supplier_materials")
     await run_statement("DROP FUNCTION IF EXISTS fn_derive_material_category()")