修复所有命令文件的usage格式：斜杠改为冒号

统一命令调用格式从 /workflow/session/list 改为 /workflow:session:list

## 修复范围
- workflow/session/: 6个子命令 (start, pause, resume, list, status, switch)
- workflow/issue/: 4个子命令 (create, list, update, close)
- workflow/: 3个主命令 (plan, execute, review)
- task/: 4个命令 (create, execute, breakdown, replan)
- gemini/: 3个命令 (chat, execute, analyze)

## 格式统一
- usage行: /workflow:session:list
- examples: /workflow:session:start "任务"
- 标题: # Command (/workflow:session:start)
- 内容引用: 所有命令路径统一使用冒号格式

## 验证完成
✅ 24个命令文件全部采用统一格式
✅ 所有examples和内容引用保持一致
✅ parent字段同步更新

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

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

.claude/commands/workflow/issue/update.md

@@ -1,31 +1,31 @@
 ---
 name: workflow-issue-update
 description: Update an existing workflow issue
-usage: /workflow/issue/update <issue-id> [changes]
-parent: /workflow/issue
+usage: /workflow:issue:update <issue-id> [changes]
+parent: /workflow:issue
 examples:
-  - /workflow/issue/update ISS-001
-  - /workflow/issue/update ISS-001 --priority=critical
-  - /workflow/issue/update ISS-001 --status=closed
+  - /workflow:issue:update ISS-001
+  - /workflow:issue:update ISS-001 --priority=critical
+  - /workflow:issue:update ISS-001 --status=closed
 ---
 
-# Update Workflow Issue (/workflow/issue/update)
+# Update Workflow Issue (/workflow:issue:update)
 
 ## Purpose
 Modify attributes and status of an existing workflow issue.
 
 ## Usage
 ```bash
-/workflow/issue/update <issue-id> [options]
+/workflow:issue:update <issue-id> [options]
 ```
 
 ## Quick Updates
 Simple attribute changes:
 ```bash
-/workflow/issue/update ISS-001 --priority=critical
-/workflow/issue/update ISS-001 --status=closed
-/workflow/issue/update ISS-001 --blocking
-/workflow/issue/update ISS-001 --type=bug
+/workflow:issue:update ISS-001 --priority=critical
+/workflow:issue:update ISS-001 --status=closed
+/workflow:issue:update ISS-001 --blocking
+/workflow:issue:update ISS-001 --type=bug
 ```
 
 ## Interactive Mode (Default)