feat(dashboard): show host for gongfoo runners in gitea view

Cross-reference gongfoo runner names against the runners table to
look up their host. Shows the short hostname in a new column for
managed runners, dash for external runners.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

crates/gongfoo-controller/src/dashboard.rs

@@ -614,16 +614,36 @@ pub async fn handle_gitea_runners(State(state): State<Arc<DashboardState>>) -> i
         }
     };
 
+    // Build a runner_name → hostname lookup for gongfoo-managed runners.
+    let host_map: std::collections::HashMap<String, String> =
+        sqlx::query_as::<_, (String, String)>(
+            r#"
+            SELECT r.runner_name, h.hostname
+            FROM runners r
+            JOIN hosts h ON h.id = r.host_id
+            WHERE r.state IN ('pending','spawning','started','registered','running')
+            "#,
+        )
+        .fetch_all(&state.pool)
+        .await
+        .unwrap_or_default()
+        .into_iter()
+        .collect();
+
     let result: Vec<DashboardGiteaRunner> = runners
         .into_iter()
-        .map(|r| DashboardGiteaRunner {
-            gitea_id: r.id,
-            managed: r.name.starts_with("gf-"),
-            labels: r.labels.into_iter().map(|l| l.name).collect(),
-            name: r.name,
-            status: r.status,
-            busy: r.busy,
-            ephemeral: r.ephemeral,
+        .map(|r| {
+            let host = host_map.get(&r.name).cloned();
+            DashboardGiteaRunner {
+                gitea_id: r.id,
+                managed: r.name.starts_with("gf-"),
+                labels: r.labels.into_iter().map(|l| l.name).collect(),
+                name: r.name,
+                status: r.status,
+                busy: r.busy,
+                ephemeral: r.ephemeral,
+                host,
+            }
         })
         .collect();
 

crates/gongfoo-proto/src/dashboard.rs

@@ -94,6 +94,7 @@ pub struct DashboardGiteaRunner {
     pub ephemeral: bool,
     pub labels: Vec<String>,
     pub managed: bool,
+    pub host: Option<String>,
 }
 
 #[derive(Debug, Clone, Serialize, Deserialize)]

dashboard/src/components/GiteaRunnersView.tsx

@@ -61,6 +61,7 @@ export function GiteaRunnersView() {
           <tr>
             <th>name</th>
             <th>type</th>
+            <th>host</th>
             <th>status</th>
             <th>labels</th>
             <th>busy</th>
@@ -80,6 +81,13 @@ export function GiteaRunnersView() {
                   <span style={{ color: "#f59e0b" }}>external</span>
                 )}
               </td>
+              <td>
+                {r.host ? (
+                  <span>{r.host.split(".")[0]}</span>
+                ) : (
+                  <span style={{ color: "#4b5563" }}>—</span>
+                )}
+              </td>
               <td>
                 <span
                   style={{
@@ -107,7 +115,7 @@ export function GiteaRunnersView() {
           ))}
           {filtered.length === 0 && (
             <tr>
-              <td colSpan={5} style={{ textAlign: "center", color: "#6b7280" }}>
+              <td colSpan={6} style={{ textAlign: "center", color: "#6b7280" }}>
                 no runners
               </td>
             </tr>

dashboard/src/types.ts

@@ -80,6 +80,7 @@ export interface DashboardGiteaRunner {
   ephemeral: boolean;
   labels: string[];
   managed: boolean;
+  host: string | null;
 }
 
 export interface DashboardScalingEntry {