feat(ui): restyle issue status and priority with colored badges

- Status labels use colored pill badges (solid bg for active, muted for inactive)
- Board columns have tinted backgrounds matching their status color
- Priority badges use orange (--priority) design token for clear distinction from status
- Issue cards restructured: identifier, title, then assignee/priority/date row
- Agent avatar default color changed from blue to gray
- New Issue button in header changed to solid/primary style
- Reduced hover shadow on board cards
- Added inheritColor prop to StatusIcon and PriorityIcon for badge use

apps/web/features/issues/components/pickers/priority-picker.tsx

@@ -43,8 +43,10 @@ export function PriorityPicker({
               setOpen(false);
             }}
           >
-            <PriorityIcon priority={p} />
-            <span>{c.label}</span>
+            <span className={`inline-flex items-center gap-1 rounded px-1.5 py-0.5 text-xs font-medium ${c.badgeBg} ${c.badgeText}`}>
+              <PriorityIcon priority={p} className="h-3 w-3" inheritColor />
+              {c.label}
+            </span>
           </PickerItem>
         );
       })}