Ensure consistent UI Strings in front_end/ui/legacy/components/color_picker

Summary of changes:
- Applied sentence case to 'Color palettes' in Spectrum.ts.
- Simplified and improved phrasing for keyboard navigation instructions
  (pressArrowKeysMessage) in Spectrum.ts with complete terminal
  punctuation.
- Refactored localization (@description) comments across
  ContrastDetails, FormatPickerContextMenu, and Spectrum to accurately
  describe UI element types and locations, ensure proper component
  casing, and include terminal punctuation.

Fixed: 547584808
Change-Id: Ieb9b8a60bd64ef1ef8dbd28e9042659db3537772
Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/8250504
Auto-Submit: Yang Guo <yangguo@chromium.org>
Commit-Queue: Yang Guo <yangguo@chromium.org>
Commit-Queue: Mathias Bynens <mathias@chromium.org>
Reviewed-by: Mathias Bynens <mathias@chromium.org>
3 files changed
tree: c70d93c4c3886ce0f2a4441810020069efe0e10c
  1. .agents/
  2. .gemini/
  3. .github/
  4. .vscode/
  5. build_overrides/
  6. config/
  7. docs/
  8. extension-api/
  9. extensions/
  10. front_end/
  11. inspector_overlay/
  12. mcp/
  13. node_modules/
  14. scripts/
  15. test/
  16. third_party/
  17. v8/
  18. .clang-format
  19. .clang-format-ignore
  20. .editorconfig
  21. .env.template
  22. .geminiignore
  23. .git-blame-ignore-revs
  24. .gitallowed
  25. .gitattributes
  26. .gitignore
  27. .gitmodules
  28. .gn
  29. .mailmap
  30. .npmignore
  31. .npmrc
  32. .style.yapf
  33. .stylelintignore
  34. .stylelintrc.json
  35. AUTHORS
  36. BUILD.gn
  37. codereview.settings
  38. CONTRIBUTING.md
  39. DEPS
  40. DIR_METADATA
  41. eslint.config.mjs
  42. favicon.ico
  43. LICENSE
  44. OWNERS
  45. package-lock.json
  46. package.json
  47. PRESUBMIT.py
  48. README.md
  49. SECURITY.md
  50. WATCHLISTS
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