feat: supervisor fixes — settings disabled cards, column toggle fix, hold SSE, campaign edit disabled

- SectionCard: added disabled prop (muted, non-clickable, no arrow)
- Settings hub: Clinics, Doctors, Team, Telephony, AI, Widget cards disabled
- Campaigns: edit button disabled
- Missed calls + Call recordings: column toggle blank page fixed (key-based
  Table remount forces clean React Aria collection on column change)
- Live monitor: replaced 5s polling with SSE stream for real-time active
  call updates (new/hold/unhold/disconnect reflected instantly)

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

src/pages/settings.tsx

@@ -73,6 +73,7 @@ export const SettingsPage = () => {
                             icon={faBuilding}
                             href="/settings/clinics"
                             status={STEP_TO_STATUS(state, 'clinics')}
+                            disabled
                         />
                         <SectionCard
                             title={SETUP_STEP_LABELS.doctors.title}
@@ -80,6 +81,7 @@ export const SettingsPage = () => {
                             icon={faStethoscope}
                             href="/settings/doctors"
                             status={STEP_TO_STATUS(state, 'doctors')}
+                            disabled
                         />
                         <SectionCard
                             title={SETUP_STEP_LABELS.team.title}
@@ -87,6 +89,7 @@ export const SettingsPage = () => {
                             icon={faUserTie}
                             href="/settings/team"
                             status={STEP_TO_STATUS(state, 'team')}
+                            disabled
                         />
                     </SectionGroup>
 
@@ -98,6 +101,7 @@ export const SettingsPage = () => {
                             icon={faPhone}
                             href="/settings/telephony"
                             status={STEP_TO_STATUS(state, 'telephony')}
+                            disabled
                         />
                         <SectionCard
                             title={SETUP_STEP_LABELS.ai.title}
@@ -105,12 +109,14 @@ export const SettingsPage = () => {
                             icon={faRobot}
                             href="/settings/ai"
                             status={STEP_TO_STATUS(state, 'ai')}
+                            disabled
                         />
                         <SectionCard
                             title="Website widget"
                             description="Embed the chat + booking widget on your hospital website."
                             icon={faGlobe}
                             href="/settings/widget"
+                            disabled
                         />
                         <SectionCard
                             title="Routing rules"