feat(ui): standardize design system, modals, sidebar, and form inputs

- Implement unified design system tokens, 10px radius, and IRANSans typography
- Modernize sidebar with Gemini-style collapsed expander, square 1:1 items, and elevated profile flyout
- Standardize all modal dialogs with 16px padding, fixed header/footer, 16px medium title, and sticky bottom actions
- Refactor DealFormView and CustomFieldsSection with standard UiField, UiInput, and UiSelect components
- Add draggable bottom-left QuickCreate floating action button

apps/web/src/components/UiIcon.vue

@@ -58,7 +58,13 @@ defineProps<{
     | 'crown'
     | 'gift'
     | 'medal'
-    | 'logout';
+    | 'logout'
+    | 'arrow-right'
+    | 'arrow-left'
+    | 'chevron-right'
+    | 'chevron-left'
+    | 'chevrons-right'
+    | 'chevrons-left';
   size?: number;
 }>();
 </script>
@@ -212,9 +218,24 @@ defineProps<{
     <template v-else-if="name === 'plus'">
       <path d="M12 6v12M6 12h12" />
     </template>
-    <template v-else-if="name === 'chevron'">
+    <template v-else-if="name === 'chevron' || name === 'chevron-right'">
       <path d="m9 6 6 6-6 6" />
     </template>
+    <template v-else-if="name === 'chevron-left'">
+      <path d="m15 18-6-6 6-6" />
+    </template>
+    <template v-else-if="name === 'chevrons-right'">
+      <path d="m6 17 5-5-5-5M13 17l5-5-5-5" />
+    </template>
+    <template v-else-if="name === 'chevrons-left'">
+      <path d="m11 17-5-5 5-5M18 17l-5-5 5-5" />
+    </template>
+    <template v-else-if="name === 'arrow-right'">
+      <path d="M5 12h14M12 5l7 7-7 7" />
+    </template>
+    <template v-else-if="name === 'arrow-left'">
+      <path d="M19 12H5M12 19l-7-7 7-7" />
+    </template>
     <template v-else-if="name === 'star'">
       <path d="m12 3.4 2.4 4.9 5.4.8-3.9 3.8.9 5.4L12 15.8 7.2 18.3l.9-5.4-3.9-3.8 5.4-.8L12 3.4Z" />
     </template>