Add support codes API and portal server changes

- support_codes.rs: 6-digit code management
- main.rs: Portal routes, static file serving, AppState
- relay/mod.rs: Updated for AppState
- Cargo.toml: Added rand, tower-http fs feature

Generated with Claude Code

server/src/relay/mod.rs

@@ -17,6 +17,7 @@ use tracing::{error, info, warn};
 
 use crate::proto;
 use crate::session::SessionManager;
+use crate::AppState;
 
 #[derive(Debug, Deserialize)]
 pub struct AgentParams {
@@ -33,11 +34,12 @@ pub struct ViewerParams {
 /// WebSocket handler for agent connections
 pub async fn agent_ws_handler(
     ws: WebSocketUpgrade,
-    State(sessions): State<SessionManager>,
+    State(state): State<AppState>,
     Query(params): Query<AgentParams>,
 ) -> impl IntoResponse {
     let agent_id = params.agent_id;
     let agent_name = params.agent_name.unwrap_or_else(|| agent_id.clone());
+    let sessions = state.sessions.clone();
 
     ws.on_upgrade(move |socket| handle_agent_connection(socket, sessions, agent_id, agent_name))
 }
@@ -45,10 +47,11 @@ pub async fn agent_ws_handler(
 /// WebSocket handler for viewer connections
 pub async fn viewer_ws_handler(
     ws: WebSocketUpgrade,
-    State(sessions): State<SessionManager>,
+    State(state): State<AppState>,
     Query(params): Query<ViewerParams>,
 ) -> impl IntoResponse {
     let session_id = params.session_id;
+    let sessions = state.sessions.clone();
 
     ws.on_upgrade(move |socket| handle_viewer_connection(socket, sessions, session_id))
 }
@@ -78,6 +81,8 @@ async fn handle_agent_connection(
         }
     });
 
+    let sessions_cleanup = sessions.clone();
+
     // Main loop: receive frames from agent and broadcast to viewers
     while let Some(msg) = ws_receiver.next().await {
         match msg {
@@ -113,7 +118,7 @@ async fn handle_agent_connection(
 
     // Cleanup
     input_forward.abort();
-    sessions.remove_session(session_id).await;
+    sessions_cleanup.remove_session(session_id).await;
     info!("Session {} ended", session_id);
 }
 
@@ -154,6 +159,8 @@ async fn handle_viewer_connection(
         }
     });
 
+    let sessions_cleanup = sessions.clone();
+
     // Main loop: receive input from viewer and forward to agent
     while let Some(msg) = ws_receiver.next().await {
         match msg {
@@ -189,6 +196,6 @@ async fn handle_viewer_connection(
 
     // Cleanup
     frame_forward.abort();
-    sessions.leave_session(session_id).await;
+    sessions_cleanup.leave_session(session_id).await;
     info!("Viewer left session: {}", session_id);
 }