feat(mcp): add read_file tool and simplify edit/write returns

- edit_file: truncate diff to 15 lines, compact result format
- write_file: return only path/bytes/message
- read_file: new tool with multi-file, directory, regex support
  - paths: single file, array, or directory
  - pattern: glob filter (*.ts)
  - contentPattern: regex content search
  - maxDepth, maxFiles, includeContent options
- Update tool-strategy.md documentation

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

ccw/src/templates/dashboard-js/components/task-queue-sidebar.js

@@ -3,7 +3,7 @@
 // ==========================================
 // Right-side slide-out toolbar for task queue management
 
-let isTaskQueueVisible = false;
+let isTaskQueueSidebarVisible = false;
 let taskQueueData = [];
 
 /**
@@ -65,13 +65,13 @@ function initTaskQueueSidebar() {
  * Toggle task queue sidebar visibility
  */
 function toggleTaskQueueSidebar() {
-  isTaskQueueVisible = !isTaskQueueVisible;
+  isTaskQueueSidebarVisible = !isTaskQueueSidebarVisible;
   const sidebar = document.getElementById('taskQueueSidebar');
   const overlay = document.getElementById('taskQueueOverlay');
   const toggle = document.getElementById('taskQueueToggle');
 
   if (sidebar && overlay && toggle) {
-    if (isTaskQueueVisible) {
+    if (isTaskQueueSidebarVisible) {
       // Close notification sidebar if open
       if (isNotificationPanelVisible && typeof toggleNotifSidebar === 'function') {
         toggleNotifSidebar();