feat: post-call workflow — disposition, appointment booking, follow-up creation

ActiveCallCard now handles the full post-call flow:
- Call ends → Disposition form appears (6 options + notes)
- "Appointment Booked" → Opens appointment booking slideout
- "Follow-up Needed" → Auto-creates follow-up in platform
- Other dispositions → Logs call and returns to worklist
- "Book Appt" button available during active call too
- Creates Call record in platform on disposition submit
- Removed auto-reset to idle (ActiveCallCard manages lifecycle)
- "Back to Worklist" resets SIP state via Jotai atoms

Also fixes:
- All 7 GraphQL queries corrected (LINKS subfields, field renames)
- Campaign edit button moved to bottom-right
- Avg Response Time uses Math.abs for seed data edge case

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

src/pages/campaigns.tsx

@@ -115,7 +115,7 @@ export const CampaignsPage = () => {
                                                 leads={leadsByCampaign.get(campaign.id) ?? []}
                                             />
                                         </Link>
-                                        <div className="absolute top-4 right-14">
+                                        <div className="absolute bottom-4 right-4 z-10">
                                             <Button
                                                 size="sm"
                                                 color="secondary"