feat(dogfood-wave1): Studio retries, Chat error, LLM gateway, kill snapshot, topbar cleanup (#14)

src/scenes/Settings.tsx

@@ -21,8 +21,8 @@ export default function Settings() {
   const setTheme = useApp((s) => s.setTheme);
   const consoleOpen = useApp((s) => s.consoleOpen);
   const setConsoleOpen = useApp((s) => s.setConsoleOpen);
-  const mode = useApp((s) => s.mode);
-  const setMode = useApp((s) => s.setMode);
+
+
   const refreshLive = useApp((s) => s.refreshLive);
   const pushToast = useApp((s) => s.pushToast);
 
@@ -108,20 +108,15 @@ export default function Settings() {
         </section>
 
         <section className="studio-panel">
-          <h3 className="panel-h"><Pulse size={12} /> Data mode & polling</h3>
+          <h3 className="panel-h"><Pulse size={12} /> Live data</h3>
           <div className="i-field">
-            <span>Current mode</span>
-            <span className={`mode-pill mode-${mode}`}>{mode === "live" ? "LIVE" : "SNAPSHOT"}</span>
+            <span>Backend</span>
+            <span className="mono">EA2 · live always</span>
           </div>
           <div className="settings-row">
-            <button className="btn btn-primary" onClick={() => setMode(mode === "live" ? "snapshot" : "live")} disabled={signingIn}>
-              <Refresh size={12} /> {mode === "live" ? "Switch to snapshot" : "Switch to live"}
+            <button className="btn btn-ghost" onClick={refreshLive} disabled={signingIn}>
+              <Refresh size={12} /> Refresh now
             </button>
-            {mode === "live" && (
-              <button className="btn btn-ghost" onClick={refreshLive}>
-                <Refresh size={12} /> Refresh now
-              </button>
-            )}
           </div>
           <label className="studio-field" style={{ marginTop: 12 }}>
             <span>Auto-refresh every (seconds)</span>
@@ -134,7 +129,7 @@ export default function Settings() {
               onChange={(e) => setPollEverySec(Number(e.target.value) || 8)}
             />
           </label>
-          <div className="settings-hint">Polling only runs in LIVE mode. Currently {mode === "live" ? "polling" : "paused"}.</div>
+          <div className="settings-hint">Polling is always active in this build (live-only).</div>
         </section>
 
         <section className="studio-panel">