style(server,agent): fmt + clippy fixes for Task 5 (CI green)

9082e11 compiles + passes all 50 server tests on the build host; only blocked
CI on cargo fmt (4 files) and one clippy -D dead-code denial:
- cargo fmt --all (relay/mod.rs, session/mod.rs, agent consent/mod.rs + session/mod.rs)
- #[cfg_attr(not(test), allow(dead_code))] on session::get_consent_state (a
  read accessor currently exercised only by tests)
No logic change.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

agent/src/consent/mod.rs

@@ -73,8 +73,7 @@ pub fn prompt_consent(technician_name: &str, access: ConsentAccessMode) -> bool
     use std::os::windows::ffi::OsStrExt;
     use windows::core::PCWSTR;
     use windows::Win32::UI::WindowsAndMessaging::{
-        MessageBoxW, IDYES, MB_ICONQUESTION, MB_SETFOREGROUND, MB_SYSTEMMODAL, MB_TOPMOST,
-        MB_YESNO,
+        MessageBoxW, IDYES, MB_ICONQUESTION, MB_SETFOREGROUND, MB_SYSTEMMODAL, MB_TOPMOST, MB_YESNO,
     };
 
     let title = "GuruConnect - Remote Support Request";
@@ -150,6 +149,9 @@ mod tests {
     #[test]
     fn access_mode_from_proto_defaults_to_control() {
         // An out-of-range proto value must not under-state access.
-        assert_eq!(ConsentAccessMode::from_proto(999), ConsentAccessMode::Control);
+        assert_eq!(
+            ConsentAccessMode::from_proto(999),
+            ConsentAccessMode::Control
+        );
     }
 }

agent/src/session/mod.rs

@@ -533,15 +533,13 @@ impl SessionManager {
 
         // The MessageBox blocks the calling thread; run it on the blocking pool
         // so the agent's async loop is not stalled and heartbeats keep flowing.
-        let granted = tokio::task::spawn_blocking(move || {
-            prompt_consent(&technician_name, access)
-        })
-        .await
-        .unwrap_or_else(|e| {
-            // The blocking task panicked — fail closed (deny).
-            tracing::error!("Consent dialog task failed: {}; denying", e);
-            false
-        });
+        let granted = tokio::task::spawn_blocking(move || prompt_consent(&technician_name, access))
+            .await
+            .unwrap_or_else(|e| {
+                // The blocking task panicked — fail closed (deny).
+                tracing::error!("Consent dialog task failed: {}; denying", e);
+                false
+            });
 
         tracing::info!(
             "End user {} consent for session {}",

server/src/relay/mod.rs

@@ -851,7 +851,8 @@ async fn handle_agent_connection(
                                 tracing::debug!(
                                     "Late ConsentResponse from agent {} on session {}; ignoring \
                                      (consent already finalized)",
-                                    agent_id, session_id
+                                    agent_id,
+                                    session_id
                                 );
                             }
                             _ => {}
@@ -978,7 +979,16 @@ async fn run_consent_handshake(
             "Failed to encode ConsentRequest for session {}; denying",
             session_id
         );
-        finalize_consent(sessions, db, session_id, agent_id, false, "encode_error", client_ip).await;
+        finalize_consent(
+            sessions,
+            db,
+            session_id,
+            agent_id,
+            false,
+            "encode_error",
+            client_ip,
+        )
+        .await;
         return false;
     }
     if ws_sender.send(Message::Binary(buf)).await.is_err() {
@@ -986,7 +996,16 @@ async fn run_consent_handshake(
             "Failed to send ConsentRequest to agent {} (session {}); denying",
             agent_id, session_id
         );
-        finalize_consent(sessions, db, session_id, agent_id, false, "send_error", client_ip).await;
+        finalize_consent(
+            sessions,
+            db,
+            session_id,
+            agent_id,
+            false,
+            "send_error",
+            client_ip,
+        )
+        .await;
         return false;
     }
 
@@ -1010,8 +1029,8 @@ async fn run_consent_handshake(
     }
 
     // 2. Wait for the ConsentResponse, bounded by the timeout.
-    let deadline = tokio::time::Instant::now()
-        + std::time::Duration::from_secs(CONSENT_TIMEOUT_SECS);
+    let deadline =
+        tokio::time::Instant::now() + std::time::Duration::from_secs(CONSENT_TIMEOUT_SECS);
 
     loop {
         let remaining = deadline.saturating_duration_since(tokio::time::Instant::now());
@@ -1020,7 +1039,10 @@ async fn run_consent_handshake(
                 "Attended session {}: consent timed out after {}s; denying",
                 session_id, CONSENT_TIMEOUT_SECS
             );
-            finalize_consent(sessions, db, session_id, agent_id, false, "timeout", client_ip).await;
+            finalize_consent(
+                sessions, db, session_id, agent_id, false, "timeout", client_ip,
+            )
+            .await;
             return false;
         }
 
@@ -1031,8 +1053,10 @@ async fn run_consent_handshake(
                     "Attended session {}: consent timed out after {}s; denying",
                     session_id, CONSENT_TIMEOUT_SECS
                 );
-                finalize_consent(sessions, db, session_id, agent_id, false, "timeout", client_ip)
-                    .await;
+                finalize_consent(
+                    sessions, db, session_id, agent_id, false, "timeout", client_ip,
+                )
+                .await;
                 return false;
             }
             // Socket closed before answering.
@@ -1042,7 +1066,13 @@ async fn run_consent_handshake(
                     session_id, agent_id
                 );
                 finalize_consent(
-                    sessions, db, session_id, agent_id, false, "agent_disconnected", client_ip,
+                    sessions,
+                    db,
+                    session_id,
+                    agent_id,
+                    false,
+                    "agent_disconnected",
+                    client_ip,
                 )
                 .await;
                 return false;
@@ -1106,7 +1136,13 @@ async fn run_consent_handshake(
                     session_id, agent_id
                 );
                 finalize_consent(
-                    sessions, db, session_id, agent_id, false, "agent_closed", client_ip,
+                    sessions,
+                    db,
+                    session_id,
+                    agent_id,
+                    false,
+                    "agent_closed",
+                    client_ip,
                 )
                 .await;
                 return false;
@@ -1152,8 +1188,8 @@ async fn finalize_consent(
 
     if let Some(db) = db {
         // Durable mirror of the consent decision on the session row.
-        let _ = db::sessions::update_consent_state(db.pool(), session_id, new_state.as_db_str())
-            .await;
+        let _ =
+            db::sessions::update_consent_state(db.pool(), session_id, new_state.as_db_str()).await;
 
         // Audit event (consent_granted | consent_denied) with the agent id and
         // the (non-secret) reason so the decision is fully traceable.

server/src/session/mod.rs

@@ -294,6 +294,9 @@ impl SessionManager {
     }
 
     /// Get the current attended-consent state for a session, if it exists.
+    /// Read accessor for the API/dashboard "awaiting consent" surface; currently
+    /// exercised by tests, so allow it to be unused in non-test builds.
+    #[cfg_attr(not(test), allow(dead_code))]
     pub async fn get_consent_state(&self, session_id: SessionId) -> Option<ConsentState> {
         let sessions = self.sessions.read().await;
         sessions.get(&session_id).map(|s| s.info.consent_state)
@@ -721,7 +724,8 @@ mod tests {
             .register_agent("agent-deny".to_string(), "Deny PC".to_string(), false)
             .await;
 
-        mgr.set_consent_state(session_id, ConsentState::Denied).await;
+        mgr.set_consent_state(session_id, ConsentState::Denied)
+            .await;
         assert_eq!(
             mgr.get_consent_state(session_id).await,
             Some(ConsentState::Denied)