fix: support rst and adoc knowledge uploads

[he-yufeng]

Summary

• allow the knowledge-base parser selector to route .rst and .adoc files through the existing MarkItDown parser
• include those formats in the dashboard file picker and supported-format copy
• add parser selection coverage for both extensions

Fixes #8213.

To verify

• python -m pytest tests/test_epub_parser.py -q
• python -m ruff check astrbot/core/knowledge_base/parsers/util.py tests/test_epub_parser.py
• python -m py_compile astrbot/core/knowledge_base/parsers/util.py tests/test_epub_parser.py
• pnpm install --frozen-lockfile in dashboard/
• pnpm typecheck in dashboard/

Note: direct pnpm exec eslint src/views/knowledge-base/components/DocumentsTab.vue could not find an ESLint config in this checkout, so I did not run the repo's lint --fix script.

Summary by Sourcery

Extend knowledge base text parsing and dashboard upload support to handle additional markup formats.

New Features:

• Support .rst and .adoc files in the knowledge base by routing them through the existing Markitdown-based text parser.
• Allow uploading .rst and .adoc files from the dashboard file picker with appropriate icons and colors in the document list.

Documentation:

• Update knowledge base UI copy to list .rst and .adoc among supported upload formats.

Tests:

• Add parser selection tests to ensure .rst and .adoc extensions are correctly mapped to the Markitdown parser.

[sourcery-ai]

Hey - I've left some high level feedback:

• The set of Markitdown-backed extensions is now duplicated across select_parser, the file input accept attribute, and the icon/color helpers; consider centralizing these extensions in a shared constant or config to keep frontend and backend behavior in sync and avoid drift when formats change.

Prompt for AI Agents

Please address the comments from this code review:

## Overall Comments
- The set of Markitdown-backed extensions is now duplicated across `select_parser`, the file input `accept` attribute, and the icon/color helpers; consider centralizing these extensions in a shared constant or config to keep frontend and backend behavior in sync and avoid drift when formats change.

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[gemini-code-assist]

Code Review

This pull request adds support for .rst and .adoc file formats to the knowledge base by updating the backend parser selection, frontend file upload filters, and UI components. Feedback suggests replacing .includes() with exact string equality when determining file icons and colors in the frontend to prevent incorrect matches with other file extensions.

[gemini-code-assist]

Using .includes() for file extension checks is unreliable because it can match substrings in unrelated extensions. For example, a file with a .first extension would incorrectly match the rst check. Since type is the lowercased extension string, exact equality is safer and more predictable.

  if (type === 'rst' || type === 'adoc') return 'mdi-file-document-outline'

[gemini-code-assist]

Similar to the icon selection logic, using .includes() here is prone to false positives with extensions that happen to contain these substrings (e.g., .first matching rst). Exact string comparison should be used to ensure the correct color is applied.

  if (type === 'rst' || type === 'adoc') return 'success'

[gemini-code-assist]

Code Review

This pull request adds support for .rst and .adoc file formats to the knowledge base by updating the parser selection logic, UI localization files, and file upload components. Feedback suggests consolidating the icon and color mapping logic in DocumentsTab.vue for these new formats and .txt files to improve maintainability and reduce redundancy.

[gemini-code-assist]

The icon mapping for .rst, .adoc, and .txt files can be consolidated since they all use the same icon (mdi-file-document-outline). This improves maintainability and reduces redundancy in the icon selection logic.

  if (type.includes('md') || type.includes('markdown')) return 'mdi-language-markdown'
  if (type.includes('rst') || type.includes('adoc') || type.includes('txt')) return 'mdi-file-document-outline'

[gemini-code-assist]

The color mapping for .rst, .adoc, and .txt files can be merged as they all share the 'success' color status. This keeps the mapping logic concise and easier to update in the future.

  if (type.includes('md')) return 'info'
  if (type.includes('rst') || type.includes('adoc') || type.includes('txt')) return 'success'