fix: resolve android plugin registration and electron upload runtime detection regressions

src/hooks/__tests__/use-file-upload.test.ts

@@ -96,6 +96,7 @@ describe('useFileUpload', () => {
 
     vi.mocked(Capacitor.getPlatform).mockReturnValue('web');
     window.electronApi = undefined;
+    window.isElectron = false;
     vi.spyOn(window, 'alert').mockImplementation(() => undefined);
   });
 
@@ -154,6 +155,31 @@ describe('useFileUpload', () => {
     expect(hook().isUploading).toBe(false);
   });
 
+  it('treats runtime as Electron when window.isElectron is true even if electronApi is unavailable', async () => {
+    uploadModeRef.value = 'preferred';
+    preferredProviderRef.value = 'catbox';
+    vi.mocked(Capacitor.getPlatform).mockReturnValue('web');
+    window.electronApi = undefined;
+    window.isElectron = true;
+    vi.mocked(orchestrateElectronUpload).mockResolvedValue('https://files.catbox.moe/electron-fallback.png');
+
+    const selectedFile = new File(['abc'], 'electron-fallback.png', { type: 'image/png' });
+    const { onUploadComplete, hook } = mountHook();
+
+    let uploadPromise: Promise<void> | undefined;
+    await act(async () => {
+      uploadPromise = hook().handleUpload();
+    });
+    await selectFileFromHiddenInput(selectedFile);
+    await act(async () => {
+      await uploadPromise;
+    });
+
+    expect(orchestrateElectronUpload).toHaveBeenCalledWith(selectedFile, ['catbox']);
+    expect(window.alert).not.toHaveBeenCalledWith('upload_not_supported_web');
+    expect(onUploadComplete).toHaveBeenCalledWith('https://files.catbox.moe/electron-fallback.png', 'electron-fallback.png');
+  });
+
   it('shows web fallback alert and does not upload', async () => {
     uploadModeRef.value = 'preferred';
     preferredProviderRef.value = 'catbox';

src/hooks/use-file-upload.ts

@@ -9,9 +9,13 @@ import useMediaHostingStore from '../stores/use-media-hosting-store';
 
 const FILE_SELECTION_CANCELLED_ERROR = 'File selection cancelled';
 
+function isElectronRuntime(): boolean {
+  return window.electronApi?.isElectron === true || window.isElectron === true;
+}
+
 function getRuntime(): 'web' | 'electron' | 'android' {
   if (Capacitor.getPlatform() === 'android') return 'android';
-  if (window.electronApi?.isElectron) return 'electron';
+  if (isElectronRuntime()) return 'electron';
   return 'web';
 }
 
@@ -25,36 +29,50 @@ function selectFileViaInput(): Promise<File | null> {
     input.type = 'file';
     input.accept = 'image/jpeg,image/png,video/mp4,video/webm';
     input.style.display = 'none';
+    let resolved = false;
+    let focusTimeoutId: number | null = null;
 
     const cleanup = () => {
-      input.remove();
-      window.removeEventListener('focus', onFocus);
-    };
-
-    const onFocus = () => {
-      window.removeEventListener('focus', onFocus);
-      setTimeout(() => {
-        if (input.files && input.files.length > 0) {
-          return;
-        }
-        cleanup();
-        resolve(null);
-      }, 100);
-    };
-
-    input.addEventListener('change', () => {
-      window.removeEventListener('focus', onFocus);
-      if (input.files && input.files.length > 0) {
-        const file = input.files[0];
-        cleanup();
-        resolve(file);
-      } else {
-        cleanup();
-        resolve(null);
+      if (focusTimeoutId !== null) {
+        window.clearTimeout(focusTimeoutId);
+        focusTimeoutId = null;
       }
-    });
+      input.remove();
+      window.removeEventListener('focus', onFocusFallback);
+      input.removeEventListener('change', onChange);
+      input.removeEventListener('cancel', onCancel);
+    };
 
-    window.addEventListener('focus', onFocus);
+    const finalize = (file: File | null) => {
+      if (resolved) return;
+      resolved = true;
+      cleanup();
+      resolve(file);
+    };
+
+    const onChange = () => {
+      const file = input.files && input.files.length > 0 ? input.files[0] : null;
+      finalize(file);
+    };
+
+    const onCancel = () => finalize(null);
+
+    // Fallback: some environments don't reliably emit `cancel`.
+    const onFocusFallback = () => {
+      if (resolved) return;
+      if (focusTimeoutId !== null) {
+        window.clearTimeout(focusTimeoutId);
+      }
+      focusTimeoutId = window.setTimeout(() => {
+        if (resolved) return;
+        const file = input.files && input.files.length > 0 ? input.files[0] : null;
+        finalize(file);
+      }, 800);
+    };
+
+    input.addEventListener('change', onChange);
+    input.addEventListener('cancel', onCancel);
+    window.addEventListener('focus', onFocusFallback);
     document.body.appendChild(input);
     input.click();
   });
@@ -87,7 +105,7 @@ export function useFileUpload(options: UseFileUploadOptions) {
         return;
       }
 
-      if (window.electronApi?.isElectron) {
+      if (isElectronRuntime()) {
         const file = await selectFileViaInput();
         if (!file) {
           throw new Error(FILE_SELECTION_CANCELLED_ERROR);