Polish Playground chat and inspector presentation

[rudrankriyam]

What changed

• Restyled user prompts as blue outgoing bubbles and kept prompt token metadata on the right.
• Changed the composer to a thin bordered capsule while leaving the voice button and its behavior alone.
• Replaced the inspector's grouped card stack with a flat inset list that fits the narrow column.
• Added persistent labels and compact rounded fields for editable values.
• Kept every inspector control, including runtime, reasoning, sampling, tools, save, apply, and Swift export.

Why

The transcript read more like a document than a conversation, and the inspector felt dense because each section sat inside another gray container. The new layout gives prompts a clear sender edge and lets spacing, labels, and dividers organize the inspector.

The reference app's plus and emoji controls were not copied because Foundation Lab has no matching actions.

Checks

• swiftlint lint --strict --config .swiftlint.yml
• swift test (59 tests ran; 4 Xcode 27 runtime tests skipped on the installed runtime)
• Fresh macOS build and launch after deleting the dedicated Derived Data directory
• Live macOS inspection of the transcript, composer, inspector fields, tool switches, and lower inspector actions
• Fresh generic iOS Simulator build with code signing disabled

[cursor]

Cursor Bugbot has reviewed your changes using default effort and found 1 potential issue.

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^{Reviewed by Cursor Bugbot for commit 863ca93. Configure here.}

[cursor]

Assistant bubbles span full width

Medium Severity

Model replies now draw a secondaryBackgroundColor bubble around messageText, but the text still expands to the transcript column’s max width. Short assistant messages show as a wide bar across the row instead of a compact incoming bubble, which conflicts with the chat-style layout this change targets.

 

^{Reviewed by Cursor Bugbot for commit 863ca93. Configure here.}