fix(downloads): preserve authenticated capture metadata

Keep Gmail attachment filenames and origin-scoped browser cookies intact through metadata redirects, while rejecting Google sign-in responses.\n\nFixes #21

src/store/useDownloadStore.test.ts

@@ -1318,6 +1318,10 @@ describe('useDownloadStore', () => {
       filename: 'file.bin',
       headers: 'X-Test: value',
       cookies: 'session=secret',
+      cookie_scopes: [
+        { url: 'https://mail.google.com/', cookies: 'SID=mail-session' },
+        { url: 'https://accounts.google.com/', cookies: 'SID=account-session' }
+      ],
       media: false
     });
 
@@ -1328,6 +1332,10 @@ describe('useDownloadStore', () => {
     expect(state.pendingAddFilename).toBe('file.bin');
 	  expect(state.pendingAddHeaders).toBe('X-Test: value');
 	  expect(state.pendingAddCookies).toBe('session=secret');
+    expect(state.pendingAddRequestContexts['https://example.com/file.bin'].cookieScopes).toEqual([
+      { url: 'https://mail.google.com/', cookies: 'SID=mail-session' },
+      { url: 'https://accounts.google.com/', cookies: 'SID=account-session' }
+    ]);
     expect(state.pendingAddMediaUrls).toEqual([]);
 	 });
 
@@ -1349,6 +1357,7 @@ describe('useDownloadStore', () => {
 	   filename: null,
 	   headers: 'User-Agent: Firefox Test',
 	   cookies: null,
+      cookie_scopes: null,
       media: false
 	  });
 
@@ -1369,6 +1378,7 @@ describe('useDownloadStore', () => {
 	   filename: 'report.pdf',
 	   headers: 'User-Agent: Test',
 	   cookies: 'session=secret',
+      cookie_scopes: null,
       media: false
 	  });
 
@@ -1390,6 +1400,7 @@ describe('useDownloadStore', () => {
       filename: 'first.zip',
       headers: 'User-Agent: First Browser',
       cookies: 'first=session',
+      cookie_scopes: null,
       media: false
     });
     await useDownloadStore.getState().handleExtensionDownload({
@@ -1399,6 +1410,7 @@ describe('useDownloadStore', () => {
       filename: 'second.zip',
       headers: 'User-Agent: Second Browser',
       cookies: 'second=session',
+      cookie_scopes: null,
       media: false
     });
 
@@ -1435,6 +1447,7 @@ describe('useDownloadStore', () => {
       filename: null,
       headers: `Cookie: stale=${'x'.repeat(64 * 1024)}\nUser-Agent: Firefox Test`,
       cookies: `oversized=${'x'.repeat(64 * 1024)}`,
+      cookie_scopes: null,
       media: true
     });
 
@@ -1454,12 +1467,31 @@ describe('useDownloadStore', () => {
       filename: 'private.zip',
       headers: null,
       cookies: 'session=secret',
+      cookie_scopes: null,
       media: false
     });
 
     expect(useDownloadStore.getState().pendingAddCookies).toBe('session=secret');
   });
 
+  it('drops extension cookie scopes for explicit media captures', async () => {
+    await useDownloadStore.getState().handleExtensionDownload({
+      urls: ['https://media.example/watch/123'],
+      referer: 'https://media.example/watch/123',
+      silent: true,
+      filename: null,
+      headers: null,
+      cookies: null,
+      cookie_scopes: [
+        { url: 'https://media.example/', cookies: 'session=secret' }
+      ],
+      media: true
+    });
+
+    expect(useDownloadStore.getState().pendingAddRequestContexts['https://media.example/watch/123']?.cookieScopes)
+      .toBeUndefined();
+  });
+
   it('clears stale request context when the same URL is captured without it later', async () => {
     const url = 'https://example.com/file.zip';
     await useDownloadStore.getState().handleExtensionDownload({
@@ -1469,6 +1501,7 @@ describe('useDownloadStore', () => {
       filename: 'private.zip',
       headers: 'Authorization: secret',
       cookies: 'session=secret',
+      cookie_scopes: null,
       media: false
     });
     await useDownloadStore.getState().handleExtensionDownload({
@@ -1478,6 +1511,7 @@ describe('useDownloadStore', () => {
       filename: null,
       headers: null,
       cookies: null,
+      cookie_scopes: null,
       media: false
     });
 
@@ -1505,6 +1539,7 @@ describe('useDownloadStore', () => {
       filename: null,
       headers: 'User-Agent: Firefox Test',
       cookies: 'session=secret',
+      cookie_scopes: null,
       media: true
     });
 
@@ -1524,6 +1559,7 @@ describe('useDownloadStore', () => {
       filename: 'file.bin',
       headers: 'User-Agent: Firefox Test',
       cookies: null,
+      cookie_scopes: null,
       media: false
     });
 

src/store/useDownloadStore.ts

@@ -5,6 +5,7 @@ import { invokeCommand as invoke } from '../ipc';
 import type { DownloadItem } from '../bindings/DownloadItem';
 import type { DownloadStatus } from '../bindings/DownloadStatus';
 import type { ExtensionDownload } from '../bindings/ExtensionDownload';
+import type { ExtensionCookieScope } from '../bindings/ExtensionCookieScope';
 import type { Queue } from '../bindings/Queue';
 import { useSettingsStore } from './useSettingsStore';
 import { useDownloadProgressStore } from './downloadProgressStore';
@@ -451,6 +452,7 @@ export type PendingAddRequestContext = {
   filename: string;
   headers: string;
   cookies: string;
+  cookieScopes?: ExtensionCookieScope[];
   media: boolean;
 };
 
@@ -487,7 +489,8 @@ interface DownloadState {
     filename?: string | null,
     headers?: string | null,
     cookies?: string | null,
-    media?: boolean
+    media?: boolean,
+    cookieScopes?: ExtensionCookieScope[] | null
   ) => void;
   handleExtensionDownload: (request: ExtensionDownloadRequest) => Promise<void>;
   deleteModalState: DeleteModalState;
@@ -652,7 +655,7 @@ export const useDownloadStore = create<DownloadState>((set, get) => ({
     // opened or closed without URLs.
     pendingAddRequestVersion: state.pendingAddRequestVersion + 1
   })),
-  openAddModalWithUrls: (urls, referer, filename, headers, cookies, media = false) => set((state) => {
+  openAddModalWithUrls: (urls, referer, filename, headers, cookies, media = false, cookieScopes) => set((state) => {
     const isAppending = state.isAddModalOpen && Boolean(state.pendingAddUrls);
     const existingUrls = isAppending ? state.pendingAddUrls : '';
     const mergedUrls = existingUrls ? `${existingUrls}\n${urls}` : urls;
@@ -660,6 +663,12 @@ export const useDownloadStore = create<DownloadState>((set, get) => ({
     const cleanFilename = filename?.trim() || '';
     const cleanHeaders = headers?.trim() || '';
     const cleanCookies = cookies?.trim() || '';
+    const cleanCookieScopes = cookieScopes
+      ?.map(scope => ({
+        url: scope.url.trim(),
+        cookies: scope.cookies.trim()
+      }))
+      .filter(scope => scope.url && scope.cookies);
     const requestVersion = state.pendingAddRequestVersion + 1;
     const pendingAddRequestContexts = isAppending
       ? { ...state.pendingAddRequestContexts }
@@ -683,6 +692,7 @@ export const useDownloadStore = create<DownloadState>((set, get) => ({
         filename: cleanFilename,
         headers: cleanHeaders,
         cookies: cleanCookies,
+        ...(cleanCookieScopes?.length ? { cookieScopes: cleanCookieScopes } : {}),
         media
       };
     }
@@ -719,7 +729,8 @@ export const useDownloadStore = create<DownloadState>((set, get) => ({
       urls.length === 1 ? request.filename : null,
       headers,
       cookies,
-      request.media === true
+      request.media === true,
+      request.media === true ? undefined : request.cookie_scopes
     );
   },
   setSelectedPropertiesDownloadId: (id) => set({ selectedPropertiesDownloadId: id }),