更新 generate.md 和 layout-extract.md 文档：添加对参考图像的自动检测和使用说明

.claude/commands/task/breakdown.md

@@ -1,7 +1,6 @@
 ---
 name: breakdown
 description: Intelligent task decomposition with context-aware subtask generation
-usage: /task:breakdown <task-id>
 argument-hint: "task-id"
 ---
 

.claude/commands/task/create.md

@@ -1,7 +1,6 @@
 ---
 name: create
 description: Create implementation tasks with automatic context awareness
-usage: /task:create "title"
 argument-hint: "\"task title\""
 ---
 

.claude/commands/task/execute.md

@@ -1,7 +1,6 @@
 ---
 name: execute
 description: Execute tasks with appropriate agents and context-aware orchestration
-usage: /task:execute <task-id>
 argument-hint: "task-id"
 ---
 

.claude/commands/task/replan.md

@@ -1,7 +1,6 @@
 ---
 name: replan
 description: Replan individual tasks with detailed user input and change tracking
-usage: /task:replan <task-id> [input]
 argument-hint: "task-id [\"text\"|file.md]"
 ---