Fix SSL SAN cert + React hydration #423

- SAN cert covers all 5 PWA domains (tasks,cal,plans,goals,chat)
- i18n hydration: SSR uses cs default, localStorage after mount
- Matches ThemeProvider pattern

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

apps/tasks/components/TaskForm.tsx

@@ -170,7 +170,7 @@ export default function TaskForm({
         </div>
       </div>
 
-      <div className="flex gap-3 pt-2">
+      <div className="flex gap-3 pt-2 sticky bottom-0 bg-white dark:bg-gray-900 pb-4 -mb-4 z-10">
         <button
           type="submit"
           disabled={loading}