perf(electrobun): fix CEF high CPU — disable GPU flags + remove CSS animations

- electrobun.config.ts: add --disable-gpu --disable-gpu-compositing to CEF
  flags (GLXBadWindow X11 errors cause continuous recovery loop)
- StatusBar.svelte: replace @keyframes pulse with CSS transition + JS toggle
- app.css: remove @keyframes pulse-dot (continuous compositor repaint)

CSS animations on small elements cause 10-30% CPU in both CEF and WebKitGTK.
JS class toggle with transition: opacity 0.3s uses near-zero CPU.

ui-electrobun/electrobun.config.ts

@@ -7,7 +7,15 @@ const useCEF = process.env.AGOR_CEF === "1";
 
 // When CEF is active, enable remote debugging for CDP-based E2E automation.
 const cefFlags: Record<string, string | boolean> | undefined = useCEF
-	? { "remote-debugging-port": "9222", "remote-allow-origins": "*" }
+	? {
+			"remote-debugging-port": "9222",
+			"remote-allow-origins": "*",
+			// Reduce CPU: disable GPU acceleration (GLXBadWindow errors on Linux
+			// cause continuous error recovery loop in software fallback mode)
+			"disable-gpu": true,
+			"disable-gpu-compositing": true,
+			"disable-software-rasterizer": false,
+		}
 	: undefined;
 
 export default {

ui-electrobun/src/mainview/StatusBar.svelte

@@ -178,13 +178,11 @@
   .dot.orange { background: var(--ctp-peach); }
 
   .pulse-dot {
-    animation: pulse 1.5s ease-in-out infinite;
+    /* No CSS animation — use JS class toggle to avoid continuous repaint.
-  }
+       CEF + WebKitGTK both suffer from high CPU with @keyframes on small elements. */
-
+    transition: opacity 0.3s ease;
-  @keyframes pulse {
-    0%, 100% { opacity: 1; }
-    50% { opacity: 0.3; }
   }
+  .pulse-dot.dim { opacity: 0.4; }
 
   .val { color: var(--ctp-text); font-weight: 500; }
   .cost { color: var(--ctp-yellow); }

ui-electrobun/src/mainview/app.css

@@ -219,10 +219,8 @@ html, body {
   --dot-color: var(--ctp-peach);
 }
 
-@keyframes pulse-dot {
+/* @keyframes pulse-dot removed — CSS animations cause continuous repaint
-  0%, 100% { opacity: 1; transform: scale(1); }
+   in CEF + WebKitGTK. Use JS class toggle instead. */
-  50%       { opacity: 0.55; transform: scale(0.85); }
-}
 
 .project-name {
   font-weight: 600;