[Crazy RoboTaxi] Add HDmap view, optionally show prompt in HUD

[aidanfnv]

Closes #553

Split off from #553, this change adds a key to show the HDmap like the pre-API-port demo had. It also adds an option to have the HUD show the current prompt being used.

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[greptile-apps]

Confidence Score: 5/5

The PR appears safe to merge; no outstanding correctness, security, or repository-rule issue was identified.

Summary

The PR adds an optional frame-aligned current-prompt HUD panel and an input-controlled view of the model’s HD-map conditioning.

• Propagates the prompt-display setting through application, session, and UI configuration.
• Publishes generated video and HD-map tensors as separate presentation outputs.
• Adds keyboard and gamepad bindings for toggling the HD-map view during gameplay.
• Caps and truncates the prompt panel while shifting affected HUD elements below it.
• Adds coverage for configuration, controls, prompt composition, output alignment, rendering, and HUD layout.

Diagram

%%{init: {'theme': 'neutral'}}%%
flowchart LR
    Engine[Model engine step] --> Video[Generated video]
    Engine --> HDMap[HD-map conditioning]
    Engine --> Prompt[Active prompt]
    Video --> Presentation[Presentation manager]
    HDMap --> Presentation
    Prompt --> HUD[Frame-aligned HUD frame]
    Input[Toggle HD-map control] --> UI[ImGui UI loop]
    Presentation --> UI
    HUD --> UI
    UI --> Choice{HD-map enabled?}
    Choice -->|No| VideoOut[Display generated video]
    Choice -->|Yes| HDMapOut[Display HD-map conditioning]

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_{Reviews (9) · Last reviewed commit: "[crazy-robotaxi] Offset live-edit HUD be..."}

[aidanfnv]

/ok to test c3206c6

[aidanfnv]

/ok to test ef7a4d7