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/pipeline/DealCard.vue

@@ -131,7 +131,7 @@ const colors = computed(() => PIPELINE_ACCENT[props.accent]);
   background: var(--badge-bg);
   color: var(--badge-fg);
   font-size: 0.65rem;
-  font-weight: 800;
+  font-weight: 600;
   line-height: 1;
 }
 
@@ -148,7 +148,7 @@ const colors = computed(() => PIPELINE_ACCENT[props.accent]);
 .titles h3 {
   margin: 0;
   font-size: 0.82rem;
-  font-weight: 800;
+  font-weight: 600;
   line-height: 1.4;
   color: var(--ink);
   cursor: pointer;
@@ -215,7 +215,7 @@ const colors = computed(() => PIPELINE_ACCENT[props.accent]);
 
 .amount strong {
   font-size: 0.88rem;
-  font-weight: 800;
+  font-weight: 600;
   color: var(--ink);
   letter-spacing: -0.01em;
   max-width: 100%;