Aster Bridge 0.4.9

fix(bridge): validate ports before save and use native clipboard

Reject IMAP/SMTP port changes that collide with the reserved
TLS/JMAP/POP3 ports before persisting, so a bad value can no longer
brick startup via load_config; self-heal a stale invalid config by
resetting the user ports to defaults instead of exiting.

Route clipboard writes through the tauri clipboard-manager plugin
(native pasteboard) with a web-API fallback, fixing the diagnostic
bundle copy that failed because the async IPC dropped webview
user-activation before navigator.clipboard.writeText.