fix(cli): close sessions without starting daemon

[EfeDurmaz16]

Summary

• handle single-session close/quit/exit locally using the daemon inventory
• avoid starting a fresh daemon just to close an inactive session
• clean up unreachable session sidecars and force-kill the recorded daemon process before the next open

Fixes #1367.

Verification

• cargo fmt --manifest-path cli/Cargo.toml -- --check
• cargo test --manifest-path cli/Cargo.toml test_is_transient_error_socket_not_found
• tmpdir=$(mktemp -d); AGENT_BROWSER_SOCKET_DIR="$tmpdir" cargo run --manifest-path cli/Cargo.toml -- close --json; rmdir "$tmpdir"
• cargo clippy --manifest-path cli/Cargo.toml --all-targets -- -D warnings
• git diff --check

[vercel]

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