feat: capture interactive agent TUI sessions

[konard]

Summary

• add shell-free interactive launch builders for Claude, Codex, OpenCode, Agent, Gemini, and Qwen, including each client's native model, resume, and safety options
• capture real PTY sessions through the released Command Stream terminal API with text/key/resize interactions and transcript, frame, asciicast, static SVG, and animated SVG artifacts
• normalize visible user/assistant messages and tool calls without dropping legitimate repeated states
• provide matching JavaScript and Rust APIs, documentation, tests, and release notes
• consume the released command-stream 0.15.0 npm package and 0.13.1 crate rather than local or Git dependencies

Reproduction

Before this change Agent Commander could drive the six clients only through non-interactive JSON/pipe paths. It had no PTY, terminal resizing, frame capture, unrolled transcript, or recording artifacts, so the OpenCode repaint failure in formal-ai#819 was unobservable.

The new fake-agent fixture reproduces an interactive client that:

1. waits for typed prompt input,
2. reports a control-key event,
3. observes a real terminal resize,
4. renders duplicate semantic states and multiple settled frames,
5. emits a stop marker.

The tests fail against the old implementation because the TUI API and all generated artifacts are absent.

Verification

JavaScript (published command-stream@0.15.0):

• npm test — 234 passed
• bun test — 234 passed
• deno test --allow-read --allow-run --allow-env --allow-net test/ — 230 passed, 4 PTY-process cases intentionally ignored by Deno
• npm run check
• npm pack --dry-run — src/tui.mjs included

Rust (published command-stream = 0.13.1):

• cargo fmt --all -- --check
• cargo clippy --all-targets --all-features
• cargo test --all-features --verbose
• cargo test --doc --verbose
• cargo package --list --allow-dirty
• node ../scripts/rust/check-file-size.mjs

Closes #43.