Editor docs overhaul - #7112

Accuracy fixes, each verified against mintlify/mint or mintlify/server:

- pages.mdx: "Editors and managers can restore them" -> "admins".
  "Manager" is not a Mintlify role.
- index.mdx: publishing on a feature branch does not automatically open a
  pull request; you choose commit-to-branch or PR. Contradicted the
  branching page's own table.
- branching-and-publishing.mdx: preview deployments build when you open a
  pull request, not on every branch save. Confirmed in gitlabWebhooks
  (handleMergeRequestOpenEvent) and cruxWebhooks (keyed on reviewId).
  tutorial.mdx was already correct.
- settings.mdx: rewritten against editor-settings-form.tsx. The panel has
  four sections, not "two layers", and the entire Appearance section was
  undocumented - including "Open live preview in new tab", which
  live-preview.mdx already linked readers to. Corrected three setting
  labels, noted that draft PRs default to on, added the 20,000-character
  instruction limit.
- live-preview.mdx: link now resolves to /editor/settings#appearance.

De-bloat:

- Split the media section out of pages.mdx (172 lines, 15 subtopics) into
  editor/media.mdx and added it to the nav.
- Trimmed index.mdx from 11 sidebar-duplicating cards to 4.

Translation orphans and redirects:

- Deleted 7 translated files whose English source was removed in April and
  June. The translate automation never cleaned them up, and in PR #6062 it
  wrote into es|fr|zh/editor/media.mdx 34 days after the English source was
  deleted.
- Dropped /editor/media -> /editor/pages so it stops shadowing the
  recreated page.
- Added /{es,fr,zh}/editor/publish, completing an English-only redirect.
- Added /editor/collaborate and its language variants. That page was
  deleted in June with no redirect and has been a live 404 since.

mint broken-links clean, mint a11y clean, vale 0/0/0 on changed files.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

Three claims traced to code that never mounts. Ethan confirmed the diff
shortcut does not work, which exposed the pattern.

- Removed Cmd/Ctrl+Shift+D for diff view. It is registered only at
  SubBar/index.tsx:488, inside EditorSubBar, which is exported and
  imported by nothing. There is no live diff shortcut; exitDiff exists
  only as an onClick in EditorModeContextMenu.
- Source mode runs CodeMirror, not Monaco. SourceEditor resolves through
  source-editor/index.tsx to editor-view.tsx, which imports
  @codemirror/state and @codemirror/view. Monaco is used only by
  EmbedModal. The shortcut rows themselves were correct: CodeMirror's
  defaultKeymap and searchKeymap match VS Code for toggle comment, move
  line, duplicate line, find, and add cursor above/below, all confirmed
  against @codemirror/commands.
- Rewrote the left panel section of pages.mdx. The tabs are Home and
  Publishing (EditorNavigationSidebarContents.tsx:62), not Navigation and
  Files. The Navigation/Files switcher lives in the same dead SubBar
  component. Home renders the workspace file tree including private
  pages; Publishing renders the site navigation and site settings.
  Confirmed by the e2e helper openPublishingNavigation, which queries the
  Publishing tab by role against the running app.

Also corrected in that section: the tree hides docs.json, dotfiles,
extensionless files, all-caps Markdown, and css/js/jsx/mjs/cjs/pdf unless
Show all files is on; "unlisted" was an invented term, replaced with a
link to /organize/hidden-pages; and the folder menu item is "New page",
confirmed by e2e, not "New file".

Added four source-mode bindings that are real and undocumented: Cmd+B and
Cmd+I insert Markdown markers, Cmd+Option+Shift+[ and ] fold and unfold
all.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

- Updated quickstart.mdx

Mintlify-Source: dashboard-editor

Brings all three translated sites onto the same nine-page structure as
English instead of waiting for the translate automation, which has a
documented history of leaving orphans behind.

Content:
- Deleted 21 orphans: branching-and-publishing, comments, configurations,
  git-essentials, live-preview, navigation, and suggestions in each
  language. None had an English source after the restructure.
- Added publish, review, and collaborate in each language.
- Rewrote index, pages, settings, agent, and keyboard-shortcuts to match
  the current English content, including Home/Publishing tabs, CodeMirror
  source mode, Show all files, and the restored Appearance section.
- Kept the existing conventions: es uses usted, fr uses vous, keywords and
  product UI labels stay in English, and every heading is wrapped in a
  <div id="english-slug"> so cross-language anchors resolve. Verified that
  every English anchor exists in all three languages.

Navigation and redirects:
- es.json, fr.json, and zh.json now list the same nine pages as docs.json.
- Removed six locale redirects that would have shadowed the new publish
  and collaborate pages once they existed.
- Added 21 locale redirects for the removed pages and retargeted the
  destinations that pointed at them.
- Retargeted four /editor/configurations redirects that pointed at
  #site-configurations, an anchor dropped in the settings rewrite.
- Rewrote stale links in changelog, authentication-setup, concepts, and
  glossary across all three languages, since broken-links does not follow
  redirects.

English fixes needed first, all caused by the settings restructure:
- Restored ## Appearance. Two pages link to #appearance, and its four
  preferences were otherwise undocumented.
- Restored ## Create draft pull requests by default, which changelog
  links to and which defaults to on.
- Promoted Main branch autocommits from ### to ##; it was nested under PR
  instructions, and its warning named a setting no longer on the page.
- Retargeted publish.mdx from the removed #auto-publish anchor.
- Fixed a missing space in the settings page intro.

mint broken-links clean, mint a11y clean (1042 files), vale 0 errors,
all five JSON files valid.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>