fix: destroy PixiJS app on prenav to avoid WebGL context loss

Cleanup now runs on the prenav event (before SPA navigation starts)
while the WebGL context is still valid, eliminating the TexturePool
errors during app.destroy(). The try/catch remains as a silent
safety net for edge cases.

src/components/scripts/graph.inline.ts

@@ -592,10 +592,8 @@ import {
         simulation.stop();
         try {
           app.destroy(true);
-        } catch (e) {
-          // PixiJS may throw if WebGL context was already lost (e.g. during SPA navigation).
-          // Swallow the error so cleanup completes and the graph can re-render.
-          console.warn("[Graph] PixiJS destroy failed (WebGL context likely lost):", e);
+        } catch (_) {
+          // PixiJS may throw if WebGL context was already lost.
         }
       };
     }
@@ -766,6 +764,10 @@ import {
     } else {
       handleNav({ detail: { url: getSlugFromUrl() } });
     }
+    document.addEventListener("prenav", function () {
+      cleanupLocal();
+      cleanupGlobal();
+    });
     document.addEventListener("nav", handleNav);
     document.addEventListener("render", handleNav);
   }