Release Mail Tools 0.1.0

docs/ACCESSIBILITY.md

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+# Accessibility
+
+Workspaces use native headings, labels, buttons, tables, lists, status regions
+and keyboard-operable tabs. Focus indicators and system light/dark selection
+come from the shared Toolbox shell. Dense tables and previews scroll rather
+than clipping; narrow layouts collapse to one column; reduced-motion preference
+is respected. Sanitized HTML preview has a descriptive iframe title.

docs/ARCHITECTURE.md

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+# Architecture
+
+The React shell lazy-loads one workbench. `core/mime.ts` turns bounded source
+text into immutable-looking header and MIME-part records; parsing never creates
+DOM. Transfer decoding consumes a global byte budget. Diagnostics, comparison,
+canonicalization and redaction are separate pure modules.
+
+Only the selected HTML text is passed through DOMPurify. It is then embedded in
+an iframe without sandbox capabilities and with an inner policy that denies all
+connections and active content. Attachment downloads are explicit Blob URLs
+with sanitized filenames. The service worker caches only same-origin app files.

docs/PRIVACY-SECURITY.md

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+# Privacy and security
+
+Messages are read through browser file APIs or pasted text and kept only in
+memory. There is no storage, telemetry, analytics, remote-resource request or
+server integration. Closing/reloading the page clears the workbench.
+
+Limits reduce accidental resource exhaustion but do not make Mail Tools a
+forensic parser. HTML loses links, styling and embedded resources by design.
+Downloaded attachments remain untrusted. Authentication results and Received
+headers are self-asserted text; no DNS or cryptographic verification occurs.
+
+Focused redaction removes a fixed set of top-level transport/authentication
+headers. It does not rewrite nested `message/rfc822` content and can leave names,
+addresses, message IDs, MIME metadata, tracking tokens, body content, document
+metadata and attachments. Review outputs independently.