admin-panel: fix CSS bugs and dedupe scoped grid utilities

Approved departure from the port's byte-faithful rule (docs/ADMIN-PORT-PLAN.md
bug rows 4-6), fixed and logged rather than silently changed:
- farsi.less: bold/700 @font-face blocks now load iran-yekan-700.woff2
  instead of the 400 file, so bold text actually renders bold. No source
  file exists for weight 300, so that face is dropped rather than faked.
- format("woff") corrected to format("woff2") on all faces.
- Removed 'font-weight: inherit' from the body,* reset, which was flattening
  every heading's weight.

Also deduped 24 view files that each redeclared .grid-2/.grid-3/.grid-4 in
a scoped <style> block with drifted minmax values, though utilities.less
already defines all three globally. Removed the scoped copies; kept
PromotionForm's genuinely different 0.5rem gap as a small .grid-4--tight
modifier instead of a full redeclaration.

Verified: pnpm build passes.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

apps/admin-panel/src/views/promotion/PromotionForm.vue

@@ -11,7 +11,7 @@
   <a-spin :spinning="loading">
     <a-form layout="vertical" @submit.prevent="handleSubmit">
       <a-card :title="title" class="mb-base">
-        <div class="grid-4">
+        <div class="grid-4 grid-4--tight">
           <a-form-item label="نوع تخفیف">
             <!-- legacy disables the type selector while editing -->
             <a-select v-model:value="form.type" :disabled="Boolean(id)" @change="changeType">
@@ -265,9 +265,10 @@ onMounted(async () => {
 </script>
 
 <style scoped>
-.grid-4 {
-  display: grid;
-  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
+/* .grid-4 base now comes from the global utilities.less (dedup); this form's
+   tighter 0.5rem gap (a real, deliberate visual difference, not a drift) is
+   kept as a small modifier instead of redeclaring the whole class. */
+.grid-4--tight {
   gap: 0.5rem;
 }
 </style>