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/HomeAiAssistant.vue

@@ -93,7 +93,7 @@ function pick(label: string) {
 <style scoped>
 .panel {
   background: #fff;
-  border-radius: 20px;
+  border-radius: var(--radius);
   padding: 1rem 1rem 0.95rem;
   box-shadow: 0 8px 24px rgba(15, 23, 42, 0.04);
   border: 1px solid #eef2f7;
@@ -144,7 +144,7 @@ h2 {
   align-items: center;
   gap: 0.55rem;
   padding: 0.58rem 0.7rem;
-  border-radius: 12px;
+  border-radius: var(--radius);
   background: #fff;
   border: 1px solid #eef2f7;
   color: #334155;
@@ -168,7 +168,7 @@ h2 {
 .chip-ico {
   width: 26px;
   height: 26px;
-  border-radius: 8px;
+  border-radius: var(--radius);
   background: #ecfdf8;
   color: #14b8a6;
   display: grid;
@@ -185,7 +185,7 @@ h2 {
 .ai-input input {
   flex: 1;
   border: 1px solid #e2e8f0;
-  border-radius: 12px;
+  border-radius: var(--radius);
   padding: 0.58rem 0.75rem;
   background: #f8fafc;
   font-size: 0.8rem;
@@ -194,7 +194,7 @@ h2 {
 .ai-input button {
   width: 40px;
   border: 0;
-  border-radius: 12px;
+  border-radius: var(--radius);
   background: #14b8a6;
   color: #fff;
   cursor: pointer;
@@ -208,7 +208,7 @@ h2 {
 
 .ai-answer {
   background: #f0fdfa;
-  border-radius: 12px;
+  border-radius: var(--radius);
   padding: 0.7rem 0.8rem;
   margin-bottom: 0.75rem;
 }