fix(audit): Batch 7-9 dead_code 标注 + TODO 清理 + 文档同步

Batch 7: dead_code 标注统一 (16 处)
- crates/ 9 处: growth, kernel, pipeline, runtime, saas, skills
- src-tauri/ 7 处: classroom, intelligence, browser, mcp
- 统一格式: #[allow(dead_code)] // @reserved: <原因>

Batch 7+: EvolutionEngine L2/L3 10 个未使用 pub 函数
- 全部标注 @reserved: EvolutionEngine L2/L3, post-release integration

Batch 9: TODO → FUTURE 标记 (4 处)
- html.rs: template-based export
- nl_schedule.rs: LLM-assisted parsing
- knowledge/handlers.rs: category_id from upload
- personality_detector.rs: VikingStorage persistence

Batch 5+: Cargo.lock 更新 (serde_yaml_bw 迁移)

全量测试通过: 719 passed, 0 failed

desktop/src-tauri/src/browser/session.rs

@@ -168,7 +168,7 @@ impl SessionManager {
 
     /// Get the number of active sessions
     /// Reserved for future status dashboard
-    #[allow(dead_code)]
+    #[allow(dead_code)] // @reserved: post-release status dashboard session count
     pub async fn session_count(&self) -> usize {
         let sessions = self.sessions.read().await;
         sessions.len()

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

@@ -101,7 +101,7 @@ impl ClassroomPersistence {
     }
 
     /// Delete a classroom and its chat history.
-    #[allow(dead_code)]
+    #[allow(dead_code)] // @reserved: post-release classroom deletion Tauri command
     pub async fn delete_classroom(&self, classroom_id: &str) -> Result<(), String> {
         let mut conn = self.conn.lock().await;
         sqlx::query("DELETE FROM classrooms WHERE id = ?")

desktop/src-tauri/src/intelligence/compactor.rs

@@ -99,7 +99,7 @@ pub struct CompactionCheck {
 
 /// Configuration for LLM-based summary generation
 /// NOTE: Reserved for future LLM compaction Tauri command
-#[allow(dead_code)]
+#[allow(dead_code)] // @reserved: post-release LLM compaction Tauri command
 #[derive(Debug, Clone, Serialize, Deserialize)]
 pub struct LlmSummaryConfig {
     pub provider: String,

desktop/src-tauri/src/intelligence/extraction_adapter.rs

@@ -313,7 +313,7 @@ pub fn configure_extraction_driver(driver: Arc<dyn LlmDriver>, model: String) {
 }
 
 /// Check if the extraction driver is available (legacy OnceCell path).
-#[allow(dead_code)]
+#[allow(dead_code)] // @reserved: diagnostic check for legacy OnceCell extraction driver
 pub fn is_extraction_driver_configured() -> bool {
     EXTRACTION_DRIVER.get().is_some()
 }
@@ -321,7 +321,7 @@ pub fn is_extraction_driver_configured() -> bool {
 /// Get the global extraction driver (legacy OnceCell path).
 ///
 /// Prefer accessing via `kernel.extraction_driver()` when the Kernel is available.
-#[allow(dead_code)]
+#[allow(dead_code)] // @reserved: legacy accessor, prefer kernel.extraction_driver()
 pub fn get_extraction_driver() -> Option<Arc<TauriExtractionDriver>> {
     EXTRACTION_DRIVER.get().cloned()
 }

desktop/src-tauri/src/intelligence/personality_detector.rs

@@ -324,7 +324,7 @@ mod tests {
 }
 
 // ---------------------------------------------------------------------------
-// Persistence helpers (stub — TODO: integrate with VikingStorage)
+// Persistence helpers (stub — FUTURE: post-release personality persistence via VikingStorage)
 // ---------------------------------------------------------------------------
 
 use std::sync::OnceLock;

desktop/src-tauri/src/intelligence_hooks.rs

@@ -206,7 +206,7 @@ pub async fn post_conversation_hook(
 ///
 /// NOTE: Memory injection is now handled by MemoryMiddleware in the Kernel
 /// middleware chain. This function is kept as a utility for ad-hoc queries.
-#[allow(dead_code)]
+#[allow(dead_code)] // @reserved: ad-hoc memory context queries outside middleware chain
 async fn build_memory_context(
     agent_id: &str,
     user_message: &str,

desktop/src-tauri/src/kernel_commands/mcp.rs

@@ -33,7 +33,7 @@ impl Default for McpManagerState {
 
 impl McpManagerState {
     /// Create with a pre-allocated kernel_adapters Arc for sharing with Kernel.
-    #[allow(dead_code)]
+    #[allow(dead_code)] // @reserved: alternate constructor for shared MCP adapter injection
     pub fn with_shared_adapters(kernel_adapters: Arc<std::sync::RwLock<Vec<McpToolAdapter>>>) -> Self {
         Self {
             manager: Arc::new(Mutex::new(McpServiceManager::new())),