fix(tui): align radio dots and menu filter prefix colors

[aidandaly24]

Description

Fixes the 09/30 RC bug-bash UX items 6 and 7:

• Match the selected radio dot to its row's existing arrow/text color.
• Color the static / beside "type to choose a command" using the existing focus accent.
• Match the "use the command line..." sentence to its command example's accent color.

Only FormRadioGroup, RouterScreen, and one color value in HarnessWizard change. Footer hints and selected-label styling are unchanged. No new tests, helpers, theme changes, or keyboard behavior changes.

Screenshots of the actual TUI screens with synthetic example data:

Related Issue

09/30 RC bug bash: UX items 6 and 7. No GitHub issue created.

Documentation PR

Not applicable: styling-only fix.

Type of Change

• Bug fix
• New feature
• Breaking change
• Documentation update
• Other (please describe):

Testing

Compared both updated screenshots with the reporter's original images and verified typing still filters the command menu. No color-specific tests added. AWS end-to-end tests are not applicable because no service behavior changed.

• I ran bun test (3,949 pass, 0 fail)
• I ran the relevant end-to-end tests with bun run test:e2e, or explained why they are not applicable
• I ran bun run typecheck
• I ran bun run lint:check
• I ran bun run format:check
• I ran bun run build
• If I modified src/assets/, I updated affected snapshots with bun test <test-file> --update-snapshots and committed them

Checklist

• I have read the CONTRIBUTING document
• I have added any necessary tests that prove my fix is effective or my feature works
• I have updated the documentation accordingly
• I have added an appropriate example to the documentation to outline the feature, or no new docs are needed
• My changes generate no new warnings
• Any dependent changes have been merged and published

---

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[agentcore-devx-automation]

Claude Security Review: no high-confidence findings. (run)

[agentcore-devx-automation]

AgentCore Harness Review

Verdict: Looks good

Small, low-risk visual tweak that swaps theme.colors.selection for theme.colors.focus on the selected radio row and lights up the [/] filter hint. Verified against _core.ts — both colors exist and the intent (match the pointer arrow accent) is consistent with the rest of FormRadioGroup. No functional, security, or test concerns; telemetry is not applicable for a pure styling change.

Two optional cleanups the author may want to consider (non-blocking):

• src/components/FormRadioGroup.tsx L66–70: the accentColor ternary now has two identical branches (focused ? focus : selected ? focus : undefined) and can be simplified to highlighted ? theme.colors.focus : undefined.
• src/components/ui/key-hint/KeyHint.tsx L58: special-casing the literal "/" inside a generic reusable component is a bit of a smell. If more keys ever need the accent treatment, consider moving this to a per-item flag on KeyHintItem (e.g. accent?: boolean) rather than string-matching in the renderer. Fine to leave as-is for the RC fix.

Nothing here requires changes before merge.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 97.40%. Comparing base (04b45c3) to head (fec9497).
⚠️ Report is 4 commits behind head on refactor.

Additional details and impacted files

@@            Coverage Diff            @@
##           refactor    #2489   +/-   ##
=========================================
  Coverage     97.39%   97.40%           
=========================================
  Files           642      642           
  Lines         46807    46808    +1     
=========================================
+ Hits          45590    45591    +1     
  Misses         1217     1217           

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[agentcore-devx-automation]

Claude Security Review: no high-confidence findings. (run)

[agentcore-devx-automation]

Claude Security Review: no high-confidence findings. (run)