fix(tauri): @reserved annotations for 16 unconnected commands

Complete Tauri command audit: 177 total (160 @connected + 16 @reserved + 1 unregistered identity_init)
Corrected zclaw_doctor from @connected to @reserved

desktop/src-tauri/src/classroom_commands/chat.rs

@@ -113,8 +113,8 @@ pub async fn classroom_chat(
     Ok(agent_responses)
 }
 
+/// @reserved — no frontend UI yet
 /// Retrieve chat history for a classroom
-// @reserved: no frontend consumer yet
 #[tauri::command]
 pub async fn classroom_chat_history(
     chat_store: State<'_, ChatStore>,

desktop/src-tauri/src/classroom_commands/generate.rs

@@ -239,8 +239,8 @@ pub async fn classroom_generate(
     })
 }
 
+/// @reserved — no frontend UI yet
 /// Get current generation progress for a topic
-// @reserved: 暂无前端集成
 #[tauri::command]
 pub async fn classroom_generation_progress(
     tasks: State<'_, GenerationTasks>,
@@ -281,8 +281,8 @@ pub async fn classroom_get(
         .ok_or_else(|| format!("Classroom '{}' not found", classroom_id))
 }
 
+/// @reserved — no frontend UI yet
 /// List all generated classrooms (id + title only)
-// @reserved: 暂无前端集成
 #[tauri::command]
 pub async fn classroom_list(
     store: State<'_, ClassroomStore>,