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## Why #22580 made app-server startup fail when the local SQLite state database cannot be initialized. Embedded/local TUI startup still continued on the permissive path, which left the CLI inconsistent and could hide a real startup problem behind unrelated UI. This brings local TUI startup onto the same fail-closed behavior while keeping recovery humane for the two failure modes we are seeing in practice: damaged database files and startup stalls caused by another process holding the database write lock. ## What changed - Embedded TUI startup now uses `state_db::try_init(...)` and returns a typed `LocalStateDbStartupError` that preserves the affected database path plus the underlying failure detail. - CLI startup handles that failure before entering the interactive TUI: - lock-contention failures tell users to quit other Codex processes and try again - failures consistent with a broken local database offer a safe repair that backs up Codex-owned SQLite files, rebuilds local database files, and retries startup once - declined or unsuccessful repairs print concise guidance plus technical details - Shared startup error plumbing lives in `tui/src/startup_error.rs`, while CLI recovery policy and focused recovery tests live in `cli/src/state_db_recovery.rs`. ## Verification - `cargo test -p codex-tui embedded_state_db_failure_is_typed_for_cli_recovery` - `cargo test -p codex-cli state_db_recovery` - Manually held an exclusive SQLite lock on `state_5.sqlite` and confirmed the CLI shows lock-specific guidance without offering repair. - Manually exercised the repair path with a deliberately invalid `sqlite_home` and confirmed it backs up the blocking path and resumes startup.