4d66ea9730
Previously, when an LSP server was configured but not installed, the error message said "No LSP server configured" which was misleading. Now the error message distinguishes between: 1. Server not configured at all 2. Server configured but not installed (with installation hints) The new error messages include: - Clear indication of whether server is configured vs installed - Installation commands for each built-in server - Supported file extensions - Configuration examples for custom servers Fixes #304 Co-authored-by: sisyphus-dev-ai <sisyphus-dev-ai@users.noreply.github.com>