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/dashboard/HomeKpiRow.vue

@@ -58,7 +58,7 @@ const iconTones: Record<string, string> = {
   gap: 0.85rem;
   align-items: flex-start;
   background: #fff;
-  border-radius: 22px;
+  border-radius: var(--radius);
   padding: 1.1rem 1.15rem;
   box-shadow: 0 8px 24px rgba(15, 23, 42, 0.04);
   border: 1px solid #eef2f7;
@@ -67,7 +67,7 @@ const iconTones: Record<string, string> = {
 .kpi-icon {
   width: 48px;
   height: 48px;
-  border-radius: 16px;
+  border-radius: var(--radius);
   background: #f8fafc;
   display: grid;
   place-items: center;