feat: ReactBits micro components integration

Installed 6 ReactBits micro components (src/components/):
- SwipeRow: swipe-to-action cards (lead approve/reject/snooze)
- CometDial: circular dial selector (future: dashboard KPI selector)
- CodeSlots: code input slots (future: API token confirmation)
- FuseButton: fuse-animated CTA with undo window
- SlideCommit: slide-to-confirm (timesheet week lock)
- HoldButton: hold-to-confirm (contract sign, dangerous actions)

Integrated into views:
- Timesheet: SlideCommit replaces 'Woche sperren' button
- Contracts: HoldButton replaces 'E-Signatur anfordern' (hold 1.5s to sign)
- Recurring: FuseButton replaces 'Jetzt ausführen' (with undo window)
- Leads: SwipeableLeadCard created (swipe to approve/reject/snooze)

Created wrapper components:
- swipeable-lead-card.tsx: SwipeRow wrapper for lead cards
- hold-to-confirm.tsx: HoldButton wrapper with loading state
- fuse-cta.tsx: FuseButton wrapper with toast feedback
- slide-to-lock.tsx: SlideCommit wrapper for GoBD week lock

0 TS errors, ESLint clean, no console errors.

components.json

@@ -17,5 +17,8 @@
     "lib": "@/lib",
     "hooks": "@/hooks"
   },
-  "iconLibrary": "lucide"
-}
+  "iconLibrary": "lucide",
+  "registries": {
+    "@react-bits": "https://reactbits.dev/r/{name}.json"
+  }
+}