fix(frontend): stop duplicate tauri bootstrap and gpu link errors

Author: Jacobinwwey

src/frontend/index.html

@@ -1625,9 +1625,6 @@ <h3>Select Target Node</h3>
     <script src="path_app.js"></script>
 
     <!-- ES Module Entry (Vite dev/build) - loads after legacy scripts for backward compat -->
-    <script>
-      window.__NC_DISABLE_MODULE_BOOT = true;
-    </script>
     <script type="module" src="./main.mjs"></script>
   </body>
 </html>

src/frontend/layout_gpu.js

@@ -232,7 +232,17 @@ class GPULinkForce {
         const nLinks = this._links.length;
         console.log(`[GPULink] Initializing for ${n} nodes, ${nLinks} links.`);
 
-        if (n === 0) return;
+        if (this.kernel) {
+            this.kernel.destroy();
+            this.kernel = null;
+        }
+
+        if (n === 0 || nLinks === 0) {
+            this.adjHead = new Float32Array(n);
+            this.adjCount = new Float32Array(n);
+            this.flatIndices = new Float32Array(0);
+            return;
+        }
 
         // Build Adjacency List (Source <-> Target)
         // D3 Link Force is symmetric: force acts on both ends.
@@ -295,8 +305,6 @@ class GPULinkForce {
         // Limit max neighbors width for texture if needed? 
         // gpu.js handles 1D arrays well.
 
-        if (this.kernel) this.kernel.destroy();
-
         // ---------------------------------------------------------
         // KERNEL
         // ---------------------------------------------------------
@@ -368,7 +376,7 @@ class GPULinkForce {
     }
 
     force(alpha) {
-        if (!this.available || this.nodes.length === 0) return;
+        if (!this.available || this.nodes.length === 0 || this._links.length === 0 || this.flatIndices.length === 0) return;
 
         const n = this.nodes.length;
         const posX = new Float32Array(n);

src/frontend/main.mjs

@@ -9,6 +9,27 @@
  * the legacy payload scripts as side-effect imports.
  */
 
+function shouldSkipModuleBootstrap() {
+    if (typeof window === 'undefined') {
+        return false;
+    }
+
+    // Legacy IIFE bootstrap is the active production path on index.html.
+    // If it is already present, the module chain must stay dormant to avoid
+    // duplicate i18n/runtime/app initialization and graph state races.
+    if (window.i18n || window.NoteConnectionRuntime || window.settingsManager) {
+        return true;
+    }
+
+    const scriptTags = Array.from(document.querySelectorAll('script[src]'));
+    return scriptTags.some((tag) => {
+        const src = String(tag.getAttribute('src') || '').trim();
+        return src.endsWith('i18n.js')
+            || src.endsWith('runtime_bridge.js')
+            || src.endsWith('source_manager.js');
+    });
+}
+
 async function bootModuleFrontend() {
     // 1. Foundation modules (ES module versions with window backward compat)
     await import('./i18n.mjs');
@@ -23,17 +44,17 @@ async function bootModuleFrontend() {
     // 3. Legacy IIFE modules (loaded as side-effect scripts; these register on window.*)
     await import('./workspace_panes.js');
     await import('./agent_workspace.js');
+    await import('./storage_provider.js');
     await import('./settings.js');
     await import('./source_manager.js');
-    await import('./storage_provider.js');
 
     // 4. Large application payloads (loaded as side-effect modules)
     await import('./path_app.js');
     await import('./app.js');
 }
 
-if (typeof window !== 'undefined' && window.__NC_DISABLE_MODULE_BOOT === true) {
-    console.log('[main.mjs] Module frontend bootstrap disabled because legacy script bootstrap is active.');
+if (shouldSkipModuleBootstrap()) {
+    console.log('[main.mjs] Module frontend bootstrap skipped because the legacy script bootstrap is active.');
 } else {
     void bootModuleFrontend();
 }

src/source_manager.loadflow.test.ts

@@ -97,8 +97,11 @@ describe('source manager load-flow guards', () => {
     const mainModulePath = path.join(repoRoot, 'src', 'frontend', 'main.mjs');
     const indexHtml = fs.readFileSync(indexPath, 'utf8');
     const mainModule = fs.readFileSync(mainModulePath, 'utf8');
-    expect(indexHtml).toContain('window.__NC_DISABLE_MODULE_BOOT = true;');
-    expect(mainModule).toContain("if (typeof window !== 'undefined' && window.__NC_DISABLE_MODULE_BOOT === true)");
+    expect(indexHtml).toContain('<script type="module" src="./main.mjs"></script>');
+    expect(indexHtml).not.toContain('window.__NC_DISABLE_MODULE_BOOT = true;');
+    expect(mainModule).toContain('function shouldSkipModuleBootstrap()');
+    expect(mainModule).toContain('window.i18n || window.NoteConnectionRuntime || window.settingsManager');
+    expect(mainModule).toContain("src.endsWith('i18n.js')");
     expect(mainModule).toContain("await import('./i18n.mjs');");
     expect(mainModule).not.toContain("import './i18n.mjs';");
   });