feat(gateway): unified settings page with subtabs

src/channels/web/mod.rs

@@ -102,6 +102,7 @@ impl GatewayChannel {
             cost_guard: None,
             routine_engine: Arc::new(tokio::sync::RwLock::new(None)),
             startup_time: std::time::Instant::now(),
+            active_config: server::ActiveConfigSnapshot::default(),
         });
 
         Self {
@@ -139,6 +140,7 @@ impl GatewayChannel {
             cost_guard: self.state.cost_guard.clone(),
             routine_engine: Arc::clone(&self.state.routine_engine),
             startup_time: self.state.startup_time,
+            active_config: self.state.active_config.clone(),
         };
         mutate(&mut new_state);
         self.state = Arc::new(new_state);
@@ -250,6 +252,12 @@ impl GatewayChannel {
         self
     }
 
+    /// Inject the active (resolved) configuration snapshot for the status endpoint.
+    pub fn with_active_config(mut self, config: server::ActiveConfigSnapshot) -> Self {
+        self.rebuild_state(|s| s.active_config = config);
+        self
+    }
+
     /// Get the auth token (for printing to console on startup).
     pub fn auth_token(&self) -> &str {
         &self.auth_token

src/channels/web/server.rs

@@ -126,6 +126,14 @@ impl RateLimiter {
     }
 }
 
+/// Snapshot of the active (resolved) configuration exposed to the frontend.
+#[derive(Debug, Clone, Default, serde::Serialize)]
+pub struct ActiveConfigSnapshot {
+    pub llm_backend: String,
+    pub llm_model: String,
+    pub enabled_channels: Vec<String>,
+}
+
 /// Shared state for all gateway handlers.
 pub struct GatewayState {
     /// Channel to send messages to the agent loop.
@@ -177,6 +185,8 @@ pub struct GatewayState {
     pub routine_engine: RoutineEngineSlot,
     /// Server startup time for uptime calculation.
     pub startup_time: std::time::Instant,
+    /// Snapshot of active (resolved) configuration for the frontend.
+    pub active_config: ActiveConfigSnapshot,
 }
 
 /// Start the gateway HTTP server.
@@ -2688,6 +2698,9 @@ async fn gateway_status_handler(
         daily_cost,
         actions_this_hour,
         model_usage,
+        llm_backend: state.active_config.llm_backend.clone(),
+        llm_model: state.active_config.llm_model.clone(),
+        enabled_channels: state.active_config.enabled_channels.clone(),
     })
 }
 
@@ -2713,6 +2726,9 @@ struct GatewayStatusResponse {
     actions_this_hour: Option<u64>,
     #[serde(skip_serializing_if = "Option::is_none")]
     model_usage: Option<Vec<ModelUsageEntry>>,
+    llm_backend: String,
+    llm_model: String,
+    enabled_channels: Vec<String>,
 }
 
 #[cfg(test)]
@@ -2826,6 +2842,7 @@ mod tests {
             cost_guard: None,
             routine_engine: Arc::new(tokio::sync::RwLock::new(None)),
             startup_time: std::time::Instant::now(),
+            active_config: ActiveConfigSnapshot::default(),
         })
     }