[sources] Consolidate SourcesPanel layout state and debug pane creation

Remove dead debug toolbar drawer, unused run-view-sidebar split widget,
and unused SettingsUI dependency. Consolidate layout state field
(#isVertical), and extract imperative #renderDebugPaneContent to simplify
subsequent declarative view migration.

Bug: 407751455
Change-Id: I762f08f51c05fa745a5ae197f7b676e57d765866
Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/8559861
Reviewed-by: Nikolay Vitkov <nvitkov@chromium.org>
Auto-Submit: Danil Somsikov <dsv@chromium.org>
Commit-Queue: Danil Somsikov <dsv@chromium.org>
3 files changed
tree: 69fe594d895f8497ff06d0fd989a463cf7d072d1
  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. dt
  42. dt.bat
  43. eslint.config.mjs
  44. favicon.ico
  45. LICENSE
  46. OWNERS
  47. package-lock.json
  48. package.json
  49. PRESUBMIT.py
  50. README.md
  51. SECURITY.md
  52. WATCHLISTS
README.md

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