Canonicalize exported source URLs

[Driedsandwich]

Summary

• Export canonical GitHub Issue and Pull Request source URLs.
• Drop incidental query parameters and fragments from the generated Markdown.
• Preserve the existing visible-page-only, local-first, read-only boundary.

Related Issue and acceptance criteria

• Issue: Closes [Privacy] Canonicalize exported source URLs #7
• Acceptance criteria: supported Issue and Pull Request URLs contain only the canonical https://github.com/<owner>/<repo>/<type>/<number> form; query and fragment data are absent.

Changes

• Reconstruct the source URL from the already-validated Issue/PR pathname inside the self-contained injected extractor.
• Add Issue and Pull Request regressions with query and fragment inputs.
• Align public documentation with the canonical URL contract.

Verification

• npm test — 38/38 passed
• Manual verification completed against exact head 771494658a89070ef40db6c3f9921d20227dd5eb
• Exact-head sanity run 31761276039 — success
• Gitleaks 8.30.1 exact tree and introduced range — finding 0
• Codex Security exact diff scan 49f97ce3-38e5-4a83-b626-b525b148b3bb — finding 0
• Isolated headed Chrome for Testing 151: exact-head single PASS receipt for a public-safe Issue, Pull Request Conversation, unsupported page, Copy, Download, and permissions; query and fragment inputs produced canonical source URLs

Risk review

• Permission impact: none; remains activeTab, scripting, clipboardWrite, with no host permissions
• Privacy impact: removes incidental navigation metadata from exports
• Dependency impact: none
• Network or external-communication impact: none; no API or external transmission added

Scope check

• No unrelated refactor or formatting changes
• No credentials, private content, personal data, or private screenshots
• Documentation updated or an explicit reason given
• No new completeness, production-readiness, or security-scanner claim

[chatgpt-codex-connector]

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[chatgpt-codex-connector]

Align the manual checks with canonical URL export

When verifying a page opened with query parameters or a fragment, the manual guide and result template still require the “current ... page URL,” so they neither describe nor test the new requirement that those components be removed. Update docs/07_manual_verification.md and docs/08_manual_verification_result_template.md to require the canonical URL and include a query/fragment case; otherwise the repository's prescribed verification can pass without exercising this behavior.

AGENTS.md reference: AGENTS.md:L58-L60

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