refactor: 代码质量清理 - 移除死代码和遗留别名

基于全面审计报告的 P0-P2 修复工作：

P0 (已完成):
- intelligence 模块: 精确注释 dead_code 标注原因（Tauri runtime 注册）
- compactor.rs: 实现 LLM 摘要生成（compact_with_llm）
- pipeline_commands.rs: 替换 println! 为 tracing 宏

P1 (已完成):
- 移除 8 个 gateway_* 向后兼容别名（OpenClaw 遗留）
- 前端 tauri-gateway.ts 改为调用 zclaw_* 命令
- 清理 generation.rs 6 个重复的实例方法（-217 行）
- A2A dead_code 注释更新

P2 (已完成):
- Predictor/Lead HAND.toml 设置 enabled=false
- Wasm/Native SkillMode 添加未实现说明
- browser/mod.rs 移除未使用的 re-export（消除 4 个警告）

文档更新:
- feature-checklist.md 从 v0.4.0 更新到 v0.6.0
- CLAUDE.md Hands 状态更新

验证: cargo check 零警告, 42 测试通过, 净减 371 行代码

desktop/src-tauri/src/lib.rs

@@ -1260,56 +1260,6 @@ fn zclaw_ping(app: AppHandle) -> Result<bool, String> {
     }
 }
 
-// ============================================================================
-// Backward-compatible aliases (OpenClaw naming)
-// These delegate to ZCLAW commands for backward compatibility
-// ============================================================================
-
-#[tauri::command]
-fn gateway_status(app: AppHandle) -> Result<LocalGatewayStatus, String> {
-    zclaw_status(app)
-}
-
-#[tauri::command]
-fn gateway_start(app: AppHandle) -> Result<LocalGatewayStatus, String> {
-    zclaw_start(app)
-}
-
-#[tauri::command]
-fn gateway_stop(app: AppHandle) -> Result<LocalGatewayStatus, String> {
-    zclaw_stop(app)
-}
-
-#[tauri::command]
-fn gateway_restart(app: AppHandle) -> Result<LocalGatewayStatus, String> {
-    zclaw_restart(app)
-}
-
-#[tauri::command]
-fn gateway_local_auth() -> Result<LocalGatewayAuth, String> {
-    zclaw_local_auth()
-}
-
-#[tauri::command]
-fn gateway_prepare_for_tauri(app: AppHandle) -> Result<LocalGatewayPrepareResult, String> {
-    zclaw_prepare_for_tauri(app)
-}
-
-#[tauri::command]
-fn gateway_approve_device_pairing(
-    app: AppHandle,
-    device_id: String,
-    public_key_base64: String,
-    url: Option<String>,
-) -> Result<LocalGatewayPairingApprovalResult, String> {
-    zclaw_approve_device_pairing(app, device_id, public_key_base64, url)
-}
-
-#[tauri::command]
-fn gateway_doctor(app: AppHandle) -> Result<String, String> {
-    zclaw_doctor(app)
-}
-
 #[cfg_attr(mobile, tauri::mobile_entry_point)]
 pub fn run() {
     // Start development server when dev-server feature is enabled
@@ -1421,15 +1371,6 @@ pub fn run() {
             zclaw_version,
             // Health check commands
             zclaw_ping,
-            // Backward-compatible aliases (OpenClaw naming)
-            gateway_status,
-            gateway_start,
-            gateway_stop,
-            gateway_restart,
-            gateway_local_auth,
-            gateway_prepare_for_tauri,
-            gateway_approve_device_pairing,
-            gateway_doctor,
             // OpenViking CLI sidecar commands
             viking_commands::viking_status,
             viking_commands::viking_add,