Replaces the hardcoded Copy/Paste/Select All menu with one driven by
ContextMenuParams: link items (Open in Browser, Copy Link Address),
image items (Copy Image, Save Image As), spellcheck suggestions, and
proper Cut/Copy/Paste in editable inputs. Both the main window and
the browser webview menus go through the shared helper.
MarkdownLink (web branch) now wraps its Pressable+Text in a real
<a href> with `display: contents` so Electron exposes linkURL on
right-click. Native branch is untouched.
Mohamed Boudra
650d3148e9