feat: applicant dashboard — team cards, editable description, feedback visibility

- Replace flat team names list with proper cards showing roles and badges
- Hide TeamMembers from metadata display, remove Withdraw from header
- Add inline-editable project description (admin-toggleable setting)
- Move applicant feedback visibility from per-round config to admin settings
- Support EVALUATION, LIVE_FINAL, DELIBERATION round types in feedback
- Backwards-compatible: falls back to old per-round config if no settings exist
- Add observer team tab toggle and 10 new SystemSettings seed entries

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/components/settings/settings-content.tsx

@@ -154,6 +154,7 @@ export function SettingsContent({ initialSettings, isSuperAdmin = true }: Settin
     'applicant_show_livefinal_scores',
     'applicant_show_deliberation_feedback',
     'applicant_hide_feedback_from_rejected',
+    'applicant_allow_description_edit',
   ])
 
   const auditSecuritySettings = getSettingsByKeys([
@@ -854,6 +855,15 @@ function AnalyticsSettingsSection({ settings }: { settings: Record<string, strin
           value={settings.applicant_hide_feedback_from_rejected || 'false'}
         />
       </div>
+      <div className="border-t pt-4 space-y-3">
+        <Label className="text-sm font-medium">Applicant Editing</Label>
+        <SettingToggle
+          label="Allow Description Editing"
+          description="Let applicants edit their project description from the dashboard"
+          settingKey="applicant_allow_description_edit"
+          value={settings.applicant_allow_description_edit || 'false'}
+        />
+      </div>
       <div className="border-t pt-4 space-y-3">
         <Label className="text-sm font-medium">PDF Reports</Label>
         <SettingToggle