rebrand: sweep remaining switchboard refs + rename cookies/storage keys

- CSS headers (4 files): Switchboard Core → Armature
- Editor .mjs headers (8 files): Chat Switchboard → Armature
- SQL migration comments + seed data (20 files): Switchboard Core → Armature
- Webhook header: X-Switchboard-Event → X-Armature-Event
- Cookie: sb_token → arm_token (3 Go files + auth.js)
- localStorage: sb_auth → arm_auth (auth.js + 2 test runners)
- localStorage: switchboard_theme → armature_theme (theme.js + base.html)
- Debug engine filter: chatSwitchboard/switchboard/sb_ → armatureChat/armature/arm_
- JS export: switchboardTheme → armatureTheme (theme.mjs + code-editor.mjs)

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

server/database/migrations/sqlite/001_core.sql

@@ -1,5 +1,5 @@
 -- ==========================================
--- Switchboard Core — 001 Core (SQLite)
+-- Armature — 001 Core (SQLite)
 -- ==========================================
 
 PRAGMA journal_mode = WAL;
@@ -69,7 +69,7 @@ CREATE TABLE IF NOT EXISTS global_settings (
 
 INSERT OR IGNORE INTO global_settings (key, value) VALUES
     ('registration', '{"enabled": true}'),
-    ('site', '{"name": "Switchboard Core", "tagline": "Extension Platform"}'),
+    ('site', '{"name": "Armature", "tagline": "Extension Platform"}'),
     ('banner', '{"enabled": false, "text": "", "bg": "#007a33", "fg": "#ffffff"}');
 
 CREATE TABLE IF NOT EXISTS user_presence (

server/database/migrations/sqlite/002_teams.sql

@@ -1,5 +1,5 @@
 -- ==========================================
--- Switchboard Core — 002 Teams & Access Control (SQLite)
+-- Armature — 002 Teams & Access Control (SQLite)
 -- ==========================================
 
 CREATE TABLE IF NOT EXISTS teams (

server/database/migrations/sqlite/003_packages.sql

@@ -1,5 +1,5 @@
 -- ==========================================
--- Switchboard Core — 003 Packages & Extensions (SQLite)
+-- Armature — 003 Packages & Extensions (SQLite)
 -- ==========================================
 
 CREATE TABLE IF NOT EXISTS packages (

server/database/migrations/sqlite/004_connections.sql

@@ -1,5 +1,5 @@
 -- ==========================================
--- Switchboard Core — 004 Connections & Dependencies (SQLite)
+-- Armature — 004 Connections & Dependencies (SQLite)
 -- ==========================================
 
 CREATE TABLE IF NOT EXISTS ext_connections (

server/database/migrations/sqlite/005_notifications.sql

@@ -1,5 +1,5 @@
 -- ==========================================
--- Switchboard Core — 005 Notifications (SQLite)
+-- Armature — 005 Notifications (SQLite)
 -- ==========================================
 
 CREATE TABLE IF NOT EXISTS notifications (

server/database/migrations/sqlite/006_audit.sql

@@ -1,5 +1,5 @@
 -- ==========================================
--- Switchboard Core — 006 Audit (SQLite)
+-- Armature — 006 Audit (SQLite)
 -- ==========================================
 
 CREATE TABLE IF NOT EXISTS audit_log (

server/database/migrations/sqlite/007_workflows.sql

@@ -1,5 +1,5 @@
 -- ==========================================
--- Switchboard Core — 007 Workflows (SQLite)
+-- Armature — 007 Workflows (SQLite)
 -- ==========================================
 -- v0.3.0: persona_id + history_mode dropped (chat vestiges).
 --         transition_rules → stage_config, stage_mode modernized.

server/database/migrations/sqlite/009_ha.sql

@@ -1,5 +1,5 @@
 -- ==========================================
--- Switchboard Core — 009 Multi-Replica HA (SQLite)
+-- Armature — 009 Multi-Replica HA (SQLite)
 -- ==========================================
 
 CREATE TABLE IF NOT EXISTS ws_tickets (

server/database/migrations/sqlite/011_triggers.sql

@@ -1,5 +1,5 @@
 -- ==========================================
--- Switchboard Core — 011 Triggers & Scheduled Tasks (SQLite)
+-- Armature — 011 Triggers & Scheduled Tasks (SQLite)
 -- ==========================================
 
 -- ── Extension Triggers (event + webhook) ──────