fix: call desk layout — collapsible context panel, worklist/calls tabs, phone numbers

- Context panel now collapsible via toggle button (sidebar icon in status bar)
- Fixed width 400px when open, full-width worklist when closed
- Worklist and Today's Calls as separate tabs instead of stacked
- Fix missed calls callerNumber transform (PHONES composite → array)

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

src/hooks/use-worklist.ts

@@ -102,6 +102,9 @@ export const useWorklist = (): UseWorklistResult => {
                     ...call,
                     callDirection: call.direction ?? call.callDirection,
                     durationSeconds: call.durationSec ?? call.durationSeconds ?? 0,
+                    callerNumber: call.callerNumber?.primaryPhoneNumber
+                        ? [{ number: call.callerNumber.primaryPhoneNumber, callingCode: '+91' }]
+                        : call.callerNumber,
                 })),
                 followUps: (json.followUps ?? []).map((fu: any) => ({
                     ...fu,