rebrand + purge orphaned frontend: Chat Switchboard → Switchboard Core

Branding: bulk rename across 50+ files (Go, JS, CSS, HTML, YAML, JSON,
shell scripts). Fix Helm chart description and git repo URLs.
Fix test helper taglines.

Admin surface: strip 14 gutted tabs (providers, models, personas,
roles, knowledge, memory, tasks, health, routing, capabilities,
channels, dashboard, usage, stats). Collapse to 4 categories:
People, Workflows, System, Monitoring.

Settings surface: strip 11 gutted tabs (models, personas, providers,
roles, knowledge, memory, usage, workflows, tasks, data, gitkeys).
Keep: general, appearance, profile, teams, connections, notifications.

Team-admin surface: strip 5 gutted tabs (personas, providers,
knowledge, tasks, usage). Keep: members, groups, connections,
workflows, settings, activity.

Components: delete chat-pane/ (13 files, 1938 lines) and
notes-pane/ (10 files, 2381 lines).

main.go: remove stale Health.Prune maintenance goroutine.

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

packages/icd-test-runner/js/crud/dashboard-package.js

@@ -27,7 +27,7 @@
         type: 'full',
         version: '0.31.1',
         tier: 'browser',
-        author: 'Chat Switchboard',
+        author: 'Switchboard Core',
         description: 'Project dashboard exercising all SDK primitives',
         route: '/s/dashboard',
         permissions: [],

packages/icd-test-runner/js/crud/editor-package.js

@@ -27,7 +27,7 @@
         type: 'full',
         version: '0.31.0',
         tier: 'browser',
-        author: 'Chat Switchboard',
+        author: 'Switchboard Core',
         description: 'Code editor with workspace management',
         route: '/s/editor',
         layout: 'editor',