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/PipelineColumn.vue

@@ -290,10 +290,10 @@ onBeforeUnmount(() => {
   min-width: 0;
   width: 100%;
   font-size: 0.98rem;
-  font-weight: 800;
+  font-weight: 600;
   color: var(--ink);
   font: inherit;
-  font-weight: 800;
+  font-weight: 600;
 }
 
 .column-head h2 {
@@ -310,7 +310,7 @@ onBeforeUnmount(() => {
   height: 1.7rem;
   padding: 0 0.4rem;
   border: 1px solid var(--line);
-  border-radius: 8px;
+  border-radius: var(--radius);
   background: #fff;
 }
 
@@ -384,7 +384,7 @@ onBeforeUnmount(() => {
   color: var(--ink);
   text-align: right;
   cursor: pointer;
-  border-radius: 8px;
+  border-radius: var(--radius);
 }
 
 .col-menu button:hover:not(:disabled) {