fix(tauri): replace silent let _ = with structured logging across 20 modules

Replace error-swallowing let _ = patterns with tracing::warn! in browser,
classroom, gateway, intelligence, memory, pipeline, secure_storage, and
viking command handlers. Ensures errors are observable in production logs.

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

@@ -506,18 +506,21 @@ impl ContextCompactor {
 // === Tauri Commands ===
 
 /// Estimate tokens for text
+// @connected
 #[tauri::command]
 pub fn compactor_estimate_tokens(text: String) -> usize {
     estimate_tokens(&text)
 }
 
 /// Estimate tokens for messages
+// @connected
 #[tauri::command]
 pub fn compactor_estimate_messages_tokens(messages: Vec<CompactableMessage>) -> usize {
     estimate_messages_tokens(&messages)
 }
 
 /// Check if compaction is needed
+// @connected
 #[tauri::command]
 pub fn compactor_check_threshold(
     messages: Vec<CompactableMessage>,
@@ -528,6 +531,7 @@ pub fn compactor_check_threshold(
 }
 
 /// Execute compaction
+// @connected
 #[tauri::command]
 pub async fn compactor_compact(
     messages: Vec<CompactableMessage>,

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

@@ -708,6 +708,7 @@ pub type HeartbeatEngineState = Arc<Mutex<HashMap<String, HeartbeatEngine>>>;
 ///
 /// Restores persisted interaction time from VikingStorage so idle-greeting
 /// check works correctly across app restarts.
+// @connected
 #[tauri::command]
 pub async fn heartbeat_init(
     agent_id: String,
@@ -756,6 +757,7 @@ async fn restore_last_interaction(agent_id: &str) {
 }
 
 /// Start heartbeat engine for an agent
+// @connected
 #[tauri::command]
 pub async fn heartbeat_start(
     agent_id: String,
@@ -770,6 +772,7 @@ pub async fn heartbeat_start(
 }
 
 /// Stop heartbeat engine for an agent
+// @connected
 #[tauri::command]
 pub async fn heartbeat_stop(
     agent_id: String,
@@ -784,6 +787,7 @@ pub async fn heartbeat_stop(
 }
 
 /// Execute a single heartbeat tick
+// @connected
 #[tauri::command]
 pub async fn heartbeat_tick(
     agent_id: String,
@@ -797,6 +801,7 @@ pub async fn heartbeat_tick(
 }
 
 /// Get heartbeat configuration
+// @connected
 #[tauri::command]
 pub async fn heartbeat_get_config(
     agent_id: String,
@@ -810,6 +815,7 @@ pub async fn heartbeat_get_config(
 }
 
 /// Update heartbeat configuration
+// @connected
 #[tauri::command]
 pub async fn heartbeat_update_config(
     agent_id: String,
@@ -825,6 +831,7 @@ pub async fn heartbeat_update_config(
 }
 
 /// Get heartbeat history
+// @connected
 #[tauri::command]
 pub async fn heartbeat_get_history(
     agent_id: String,
@@ -840,6 +847,7 @@ pub async fn heartbeat_get_history(
 
 /// Update memory stats cache for heartbeat checks
 /// This should be called by the frontend after fetching memory stats
+// @connected
 #[tauri::command]
 pub async fn heartbeat_update_memory_stats(
     agent_id: String,
@@ -852,6 +860,7 @@ pub async fn heartbeat_update_memory_stats(
 }
 
 /// Record a user correction for personality improvement detection
+// @connected
 #[tauri::command]
 pub async fn heartbeat_record_correction(
     agent_id: String,
@@ -863,6 +872,7 @@ pub async fn heartbeat_record_correction(
 
 /// Record a user interaction for idle greeting detection
 /// Call this from frontend whenever user sends a message
+// @connected
 #[tauri::command]
 pub async fn heartbeat_record_interaction(
     agent_id: String,

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

@@ -545,6 +545,7 @@ use tokio::sync::Mutex;
 pub type IdentityManagerState = Arc<Mutex<AgentIdentityManager>>;
 
 /// Initialize identity manager
+// @reserved: 暂无前端集成
 #[tauri::command]
 #[allow(dead_code)] // NOT registered in invoke_handler — identity state is initialized lazily via identity_get
 pub async fn identity_init() -> Result<IdentityManagerState, String> {
@@ -552,6 +553,7 @@ pub async fn identity_init() -> Result<IdentityManagerState, String> {
 }
 
 /// Get identity files for an agent
+// @connected
 #[tauri::command]
 pub async fn identity_get(
     agent_id: String,
@@ -562,6 +564,7 @@ pub async fn identity_get(
 }
 
 /// Get a specific file
+// @connected
 #[tauri::command]
 pub async fn identity_get_file(
     agent_id: String,
@@ -578,6 +581,7 @@ pub async fn identity_get_file(
 }
 
 /// Build system prompt
+// @connected
 #[tauri::command]
 pub async fn identity_build_prompt(
     agent_id: String,
@@ -589,6 +593,7 @@ pub async fn identity_build_prompt(
 }
 
 /// Update user profile (auto)
+// @connected
 #[tauri::command]
 pub async fn identity_update_user_profile(
     agent_id: String,
@@ -601,6 +606,7 @@ pub async fn identity_update_user_profile(
 }
 
 /// Append to user profile
+// @connected
 #[tauri::command]
 pub async fn identity_append_user_profile(
     agent_id: String,
@@ -613,6 +619,7 @@ pub async fn identity_append_user_profile(
 }
 
 /// Propose a change
+// @connected
 #[tauri::command]
 pub async fn identity_propose_change(
     agent_id: String,
@@ -631,6 +638,7 @@ pub async fn identity_propose_change(
 }
 
 /// Approve a proposal
+// @connected
 #[tauri::command]
 pub async fn identity_approve_proposal(
     proposal_id: String,
@@ -641,6 +649,7 @@ pub async fn identity_approve_proposal(
 }
 
 /// Reject a proposal
+// @connected
 #[tauri::command]
 pub async fn identity_reject_proposal(
     proposal_id: String,
@@ -651,6 +660,7 @@ pub async fn identity_reject_proposal(
 }
 
 /// Get pending proposals
+// @connected
 #[tauri::command]
 pub async fn identity_get_pending_proposals(
     agent_id: Option<String>,
@@ -665,6 +675,7 @@ pub async fn identity_get_pending_proposals(
 }
 
 /// Update file directly
+// @connected
 #[tauri::command]
 pub async fn identity_update_file(
     agent_id: String,
@@ -677,6 +688,7 @@ pub async fn identity_update_file(
 }
 
 /// Get snapshots
+// @connected
 #[tauri::command]
 pub async fn identity_get_snapshots(
     agent_id: String,
@@ -692,6 +704,7 @@ pub async fn identity_get_snapshots(
 }
 
 /// Restore snapshot
+// @connected
 #[tauri::command]
 pub async fn identity_restore_snapshot(
     agent_id: String,
@@ -703,6 +716,7 @@ pub async fn identity_restore_snapshot(
 }
 
 /// List agents
+// @connected
 #[tauri::command]
 pub async fn identity_list_agents(
     state: tauri::State<'_, IdentityManagerState>,
@@ -712,6 +726,7 @@ pub async fn identity_list_agents(
 }
 
 /// Delete agent identity
+// @connected
 #[tauri::command]
 pub async fn identity_delete_agent(
     agent_id: String,

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

@@ -719,6 +719,7 @@ pub type ReflectionEngineState = Arc<Mutex<ReflectionEngine>>;
 
 /// Initialize reflection engine with config
 /// Updates the shared state with new configuration
+// @connected
 #[tauri::command]
 pub async fn reflection_init(
     config: Option<ReflectionConfig>,
@@ -732,6 +733,7 @@ pub async fn reflection_init(
 }
 
 /// Record a conversation
+// @connected
 #[tauri::command]
 pub async fn reflection_record_conversation(
     state: tauri::State<'_, ReflectionEngineState>,
@@ -742,6 +744,7 @@ pub async fn reflection_record_conversation(
 }
 
 /// Check if reflection should run
+// @connected
 #[tauri::command]
 pub async fn reflection_should_reflect(
     state: tauri::State<'_, ReflectionEngineState>,
@@ -751,6 +754,7 @@ pub async fn reflection_should_reflect(
 }
 
 /// Execute reflection
+// @connected
 #[tauri::command]
 pub async fn reflection_reflect(
     agent_id: String,
@@ -766,6 +770,7 @@ pub async fn reflection_reflect(
 /// Returns in-memory history first. If empty and an agent_id is provided,
 /// falls back to the persisted history array from VikingStorage metadata,
 /// then to the single latest result for backward compatibility.
+// @connected
 #[tauri::command]
 pub async fn reflection_get_history(
     limit: Option<usize>,
@@ -815,6 +820,7 @@ pub async fn reflection_get_history(
 }
 
 /// Get reflection state
+// @connected
 #[tauri::command]
 pub async fn reflection_get_state(
     state: tauri::State<'_, ReflectionEngineState>,