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Alan Wizemann
df1b9caabf
The chat font-size slider only set `\.dynamicTypeSize` on the chat
root, but ScarfFont tokens are fixed-point (`Font.system(size: 14, …)`)
so dynamic type didn't reach bubble text, reasoning, tool chips, code
blocks, or markdown headings. Slider moved between 85%–130% with
little visible effect.
Plumb a separate `\.chatFontScale: Double` env value from
`RichChatView` and have the chat content views read it:
- `RichMessageBubble` — user bubble body, reasoning (disclosure +
inline), REASONING label, token chip, tool-chip name, metadata
footer.
- `MarkdownContentView` — paragraphs (now pinned to a scaled body
font instead of inheriting), headings (1..5), inline-rendered code
blocks, code-language label.
- `CodeBlockView` — code body and language label.
`ChatFontScale.{body, callout, caption, captionStrong, caption2,
mono, monoSmall, codeBlock, codeInline}(_ scale:)` helpers mirror
`ScarfFont`'s base sizes so scale = 1.0 is byte-for-byte identical
to today's UI; the slider now actually moves the visible chat text.
Other surfaces (settings, sidebar, etc.) still use the static
ScarfFont tokens — chat scaling stays scoped to the chat surface.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>