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>

src/js/sw/surfaces/admin/index.js

@@ -19,23 +19,17 @@ import { DialogStack } from '../../shell/dialog-stack.js';
 // ── Category → Section mapping ──────────────
 const ADMIN_SECTIONS = {
     people:     ['users', 'teams', 'groups'],
-    ai:         ['providers', 'models', 'personas', 'roles', 'knowledgeBases', 'memory'],
-    workflows:  ['workflows', 'tasks'],
-    routing:    ['health', 'routing', 'capabilities'],
-    system:     ['settings', 'storage', 'packages', 'connections', 'channels', 'broadcast'],
-    monitoring: ['dashboard', 'usage', 'audit', 'stats'],
+    workflows:  ['workflows'],
+    system:     ['settings', 'storage', 'packages', 'connections', 'broadcast'],
+    monitoring: ['audit'],
 };
 
 const ADMIN_LABELS = {
     users: 'Users', teams: 'Teams', groups: 'Groups',
-    providers: 'Providers', models: 'Models', personas: 'Personas',
-    roles: 'Roles', knowledgeBases: 'Knowledge', memory: 'Memory',
-    health: 'Health', routing: 'Routing', capabilities: 'Capabilities',
-    workflows: 'Workflows', tasks: 'Tasks',
+    workflows: 'Workflows',
     settings: 'Settings', storage: 'Storage', packages: 'Packages',
-    connections: 'Connections',
-    channels: 'Channels', broadcast: 'Broadcast',
-    dashboard: 'Dashboard', usage: 'Usage', audit: 'Audit', stats: 'Stats',
+    connections: 'Connections', broadcast: 'Broadcast',
+    audit: 'Audit',
 };
 
 // ── v0.38.3: Extension config sections ──────
@@ -54,11 +48,9 @@ for (const cs of _configSections) {
 
 const CATEGORY_META = {
     people:     { label: 'People',     first: 'users',     icon: 'M17 21v-2a4 4 0 0 0-4-4H5a4 4 0 0 0-4 4v2|C9 7 4' },
-    ai:         { label: 'AI',         first: 'providers', icon: 'R4 4 16 16 2|L9 9 9.01 9|L15 9 15.01 9|M8 14s1.5 2 4 2 4-2 4-2' },
     workflows:  { label: 'Workflows',  first: 'workflows', icon: 'P16 3 21 3 21 8|L4 20 21 3|P21 16 21 21 16 21|L15 15 21 21|L4 4 9 9' },
-    routing:    { label: 'Routing',    first: 'health',    icon: 'G13 2 3 14 12 14 11 22 21 10 12 10 13 2' },
     system:     { label: 'System',     first: 'settings',  icon: 'C12 12 3|M19.4 15a1.65 1.65 0 0 0 .33 1.82l.06.06a2 2 0 0 1-2.83 2.83l-.06-.06a1.65 1.65 0 0 0-1.82-.33 1.65 1.65 0 0 0-1 1.51V21a2 2 0 0 1-4 0v-.09' },
-    monitoring: { label: 'Monitoring', first: 'dashboard', icon: 'L18 20 18 10|L12 20 12 4|L6 20 6 14' },
+    monitoring: { label: 'Monitoring', first: 'audit',     icon: 'L18 20 18 10|L12 20 12 4|L6 20 6 14' },
 };
 
 // ── Lazy section imports ────────────────────
@@ -68,27 +60,13 @@ const sectionModules = {
     users:          () => import(`./users.js${_v}`),
     teams:          () => import(`./teams.js${_v}`),
     groups:         () => import(`./groups.js${_v}`),
-    providers:      () => import(`./providers.js${_v}`),
-    models:         () => import(`./models.js${_v}`),
-    personas:       () => import(`./personas.js${_v}`),
-    roles:          () => import(`./roles.js${_v}`),
-    knowledgeBases: () => import(`./knowledge.js${_v}`),
-    memory:         () => import(`./memory.js${_v}`),
     workflows:      () => import(`./workflows.js${_v}`),
-    tasks:          () => import(`./tasks.js${_v}`),
-    health:         () => import(`./health.js${_v}`),
-    routing:        () => import(`./routing.js${_v}`),
-    capabilities:   () => import(`./capabilities.js${_v}`),
     settings:       () => import(`./settings.js${_v}`),
     storage:        () => import(`./storage.js${_v}`),
     packages:       () => import(`./packages.js${_v}`),
     connections:    () => import(`./connections.js${_v}`),
-    channels:       () => import(`./channels.js${_v}`),
     broadcast:      () => import(`./broadcast.js${_v}`),
-    dashboard:      () => import(`./dashboard.js${_v}`),
-    usage:          () => import(`./usage.js${_v}`),
     audit:          () => import(`./audit.js${_v}`),
-    stats:          () => import(`./stats.js${_v}`),
 };
 
 // v0.38.3: Register dynamic section loaders for extension config sections