fix(panel): prevent UI freeze when opening panel during extraction

Root cause: onStreamProgress callback fires 20-50x/sec during LLM streaming,
each calling setLastExtractionStatus with syncRuntime=true (default), which
triggers setRuntimeStatus -> refreshPanelLiveState() -> _refreshDashboard().
_refreshDashboard iterates all graph nodes (.filter x2) and performs heavy
DOM updates each time. When the panel is open, this blocks the main thread.

Fixes:
1. panel.js: Add requestAnimationFrame throttle to refreshLiveState() with
   minimum 80ms gap between actual DOM refreshes. Rapid calls are collapsed
   into a single animation frame, preventing main thread saturation.
2. extraction-controller.js: Change onStreamProgress to use syncRuntime=false
   so streaming updates no longer trigger setRuntimeStatus (which would also
   update the floating ball on each chunk).
3. recall-controller.js: Same fix for recall onStreamProgress which had
   the identical syncRuntime=true issue.

retrieval/recall-controller.js

@@ -688,16 +688,16 @@ export async function runRecallController(runtime, options = {}) {
         schema: runtime.getSchema(),
         signal: recallSignal,
         settings,
-        onStreamProgress: ({ previewText, receivedChars }) => {
-          const preview =
-            previewText?.length > 60
-              ? "…" + previewText.slice(-60)
-              : previewText || "";
-          runtime.setLastRecallStatus(
-            "AI 生成中",
-            `${preview}  [${receivedChars}字]`,
-            "running",
-            { syncRuntime: true, noticeMarquee: true },
+          onStreamProgress: ({ previewText, receivedChars }) => {
+            const preview =
+              previewText?.length > 60
+                ? "…" + previewText.slice(-60)
+                : previewText || "";
+            runtime.setLastRecallStatus(
+              "AI 生成中",
+              `${preview}  [${receivedChars}字]`,
+              "running",
+              { syncRuntime: false, noticeMarquee: true },
           );
         },
         options: runtime.buildRecallRetrieveOptions(settings, context),