Improve Wiki reader layout and revision history UX

[lyingbug]

Summary

• Restructure the Wiki reading page header: title on the left, actions and timestamp on the right, and metadata badges (type, version, edit source, aliases) on a single row below the title.
• Rework the revision history drawer with resizable SettingDrawer, field-level diffs (title/summary/body), and corrected incremental comparison (previous → selected); v1 now shows initial creation content instead of an empty state.
• Unify the page footer (backlinks + source documents) with in-body wiki link styling and clearer spacing between multiple items.
• Fix empty-string line diffing so v1 title/summary diffs no longer show spurious red blank lines.

Test plan

• Open a Wiki page and verify header layout: badges row, right-side actions, and alias badges.
• Enter edit mode and confirm title/summary/content fields are visually distinct with bordered inputs.
• Open revision history: compare v2+ incremental/cumulative/raw modes; select v1 and confirm "版本变更" shows initial content without empty delete rows.
• Verify footer backlinks and source docs are clickable, spaced apart, and use dashed wiki-link styling.
• Run npm test -- src/utils/wikiLineDiff.test.ts src/utils/wikiRevisionDiff.test.ts