* fix: implement loading timeout, SSE reconnect, and message retry
- Loading timeout: 30s timeout with retry/cancel buttons to prevent infinite loading
- SSE reconnect: Auto-reconnect up to 3 times with exponential backoff (1s, 2s, 4s)
- Message retry: Ensure critical messages reach webview with 5s timeout and 3 retries
This fix prevents the chat from getting stuck in a permanent loading state
and improves reliability of SSE connections and webview communication.
Fixes#851
* fix: harden vscode bridge retry flow
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Co-authored-by: Bohdan Triapitsyn <artmore@protonmail.com>
