feat: inline table editor for spec sections

[corvid-agent]

Summary

• Adds inline table editor for spec sections containing markdown tables (Exported Functions, Error Cases, Dependencies, Change Log, etc.)
• Sections with tables render a structured form with header labels and text inputs per cell, with add/remove/reorder row actions
• Sections without tables continue to use the existing CodeMirror editor unchanged
• Round-trip markdown parsing: content is parsed into text + table blocks, edited inline, and serialized back to valid markdown

Changes

• New: src/app/models/markdown-table.ts — parse/serialize markdown tables and content blocks
• New: src/app/components/table-editor/ — TableEditorComponent with row actions and dark-themed styling
• Modified: section-editor component — smart mode switching between structured (table) and CodeMirror modes, with suppressBlockParse to prevent re-parse loops

Test plan

• Open a spec with table sections (e.g. Exported Functions) and verify inline table editor renders
• Add, remove, and reorder rows — verify markdown output is correct
• Edit text between tables — verify textareas preserve content
• Open a spec without tables — verify CodeMirror editor still works
• Switch between table and non-table sections — verify no render glitches
• Run ng build — verify no build errors

🤖 Generated with Claude Code

[corvid-agent]

@corvid-agent resolve the merge conflicts and rebase.

[corvid-agent]

Done — rebased feat/table-editor onto main and force-pushed. Resolved merge conflicts in:

• src/app/components/repo-browser/repo-browser.ts (blank line differences)
• src/app/components/spec-list/spec-list.html (kept ARIA accessibility attributes from main, added table editor template logic)
• src/app/components/spec-list/spec-list.scss (kept min-height: 0 and font-size: 20px chevron from main)
• src/app/components/spec-list/spec-list.ts (kept suiteOrder comparator from main)
• src/app/components/spec-list/spec-list.spec.ts (kept confirmation dialog tests from main)
• src/app/components/section-editor/section-editor.html (merged ARIA attributes with table editor feature)
• src/app/services/github.service.spec.ts (kept tree-based API mocks from main)
• e2e/app.spec.ts (kept dialog accept handler from main)

One commit (fix: spec list scrolling and default category sort order) was skipped as it was already cherry-picked into main. The branch now has 2 clean commits on top of main.