chore: strip remaining pre-fork version references

Second pass — removes chat-switchboard version numbers from config
field docs, section headers, file headers, and test comments. These
were pre-fork version tags that don't apply to switchboard-core.

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

src/js/sw/surfaces/settings/connections.js

@@ -1,6 +1,5 @@
 /**
  * ConnectionsSection — personal extension connection CRUD
- * v0.38.1: Scoped credential management for extensions
  */
 const { html } = window;
 const { useState, useEffect, useCallback } = hooks;

src/js/sw/surfaces/settings/index.js

@@ -44,7 +44,7 @@ const SECTION_TITLES = {
     connections: 'Connections', notifications: 'Notifications',
 };
 
-// ── v0.38.3: Extension config sections ──────
+// ── Extension config sections ──────
 // Packages declare config_section in their manifest. The backend passes
 // matching entries via __CONFIG_SECTIONS__. We merge them into the nav
 // and section module map for lazy loading.