Accessibility: subtitles/captions, colorblind modes, global UI text scaling

[drsnuggles8]

Problem

No accessibility features exist. UITextComponent has a per-component font size but there's no global text scale, no subtitle/caption system, and no colorblind modes (a grep for subtitle/caption/colorblind/accessibility finds nothing relevant).

Why it matters

Increasingly a storefront/cert requirement; subtitles in particular are expected for a narrative shooter, and global text scaling + colorblind palettes are baseline accessibility.

Proposed approach

• Subtitle/caption system (timed lines, speaker label) driven by the dialogue/audio systems.
• Global UI text-scale multiplier (with a minimum legible size) applied across UITextComponent.
• Colorblind palette modes (deuteran / protan / tritan) as a post-process LUT or palette swap.

Acceptance criteria

• Dialogue / voice lines show subtitles that can be toggled.
• A global text-scale setting visibly scales all UI text.
• Colorblind mode changes the presented palette.

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Tier C — accessibility.

Score

capability: 3
craft: 3
stability: 1
decay: 1
effort: 5
confidence: 0.8
learning: 3
fun: 3
kano: table-stakes
blocked_by: []
blocks: []

_{Rated per issue-scoring · score = confidence × (capability + craft + stability + decay) / effort, derived by the picker.}