Feature pack: Media, Gamification, Templates, Time Tracking, Kanban, AI Briefing, Webhooks, Icon UI

API features (separate files in /api/src/features/):
- media-input: upload text/audio/photo/video, transcription
- gamification: points, streaks, badges, leaderboard
- templates: predefined task sets (sprint, study, moving)
- time-tracking: start/stop timer, task/user reports
- kanban: board view, drag-and-drop move
- ai-briefing: daily AI summary with tasks/goals/reviews
- webhooks-outgoing: notify external systems on events

UI components (separate files in /components/features/):
- IconButton: icon-only buttons with tooltip
- CompactHeader, PageActionBar, InlineEditField
- TaskDetailActions, GoalActionButtons, CollabActionButtons
- DeleteIconButton, CollabBackButton

All features modular — registry.js enables/disables each one.

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

apps/tasks/components/features/CollabBackButton.tsx

@@ -0,0 +1,23 @@
+'use client';
+import IconButton from './IconButton';
+
+interface Props {
+    onClick: () => void;
+    label: string;
+}
+
+export default function CollabBackButton({ onClick, label }: Props) {
+    return (
+        <IconButton
+            icon={
+                <svg className="w-5 h-5" fill="none" viewBox="0 0 24 24" stroke="currentColor" strokeWidth={2}>
+                    <path strokeLinecap="round" strokeLinejoin="round" d="M15 19l-7-7 7-7" />
+                </svg>
+            }
+            label={label}
+            onClick={onClick}
+            variant="default"
+            size="md"
+        />
+    );
+}