- Removed terminal risk mode toggles from config, terminal state collection, and render controllers.
- Dropped snapshot freezing, thaw tracking, and finalized-block replay in transcript rendering.
- Removed clear-on-shrink settings and initialization hooks from selector and interactive mode flows.
- Simplified render scheduling by using requestRender() without mutation flags or stream checkpoints.
- Added debug menu options for terminal state and protocol checks with new handlers.
- Added terminal diagnostics models and collectors to report geometry, protocol flags, and multiplexer data.
- Added protocol-probe utilities to encode RGB PNGs, generate sample content, and render test panels.
- Added support components for verbatim line rendering and OSC66-scaled text rows.
- Added tests validating image encoding, OSC66 output, and terminal state formatting.
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