Add external browser support for OAuth2 authorization (#375)

Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>

src-web/components/core/Icon.tsx

@@ -44,6 +44,7 @@ import {
   CookieIcon,
   CopyCheck,
   CopyIcon,
+  CornerRightDownIcon,
   CornerRightUpIcon,
   CreditCardIcon,
   CrosshairIcon,
@@ -63,6 +64,7 @@ import {
   FlaskConicalIcon,
   FolderCodeIcon,
   FolderCogIcon,
+  FolderDownIcon,
   FolderGitIcon,
   FolderIcon,
   FolderInputIcon,
@@ -179,6 +181,7 @@ const icons = {
   cookie: CookieIcon,
   copy: CopyIcon,
   copy_check: CopyCheck,
+  corner_right_down: CornerRightDownIcon,
   corner_right_up: CornerRightUpIcon,
   credit_card: CreditCardIcon,
   crosshair: CrosshairIcon,
@@ -205,6 +208,7 @@ const icons = {
   folder_output: FolderOutputIcon,
   folder_symlink: FolderSymlinkIcon,
   folder_sync: FolderSyncIcon,
+  folder_down: FolderDownIcon,
   folder_up: FolderUpIcon,
   gift: GiftIcon,
   git_branch: GitBranchIcon,