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chanthuang 5fa68ccaa0 feat(mail): add email signature support (#485)
* feat(mail): add signature foundation, draft exports, and +signature shortcut

- Add signature data model, API provider, and template variable
  interpolation with tests (shortcuts/mail/signature/)
- Export signature-related symbols from draft package (SignatureWrapperClass,
  BuildSignatureHTML, FindMatchingCloseDiv, SplitAtQuote, RemoveSignatureHTML,
  SignatureSpacing, SignatureImage) for use by compose shortcuts
- Add +signature shortcut for listing and viewing email signatures
- Add signature reference documentation

Change-Id: I62525e7b475692ada9ec8590b6d0252cf5afcdbc
Co-Authored-By: AI

* feat(mail): add --signature-id to all compose shortcuts

- Add --signature-id flag to +draft-create, +send, +reply, +reply-all,
  +forward for inserting a signature into the email body
- Add signature image download with SSRF protection (https enforcement,
  no token leak, context timeout, size limit)
- Add signature HTML insertion with quote-aware placement
- Update compose shortcut reference docs

Change-Id: Ic5606bab7826a20364084898ad1714778e5a8bd0
Co-Authored-By: AI

* feat(mail): add signature insert/remove ops for +draft-edit

- Add insert_signature and remove_signature patch operations with
  old-signature MIME cleanup and case-insensitive CID matching
- Expose signature ops in supported_ops flat list
- Update SKILL.md and draft-edit reference docs

Change-Id: I74affbf555e32351520f610ef42195f399a265d9
Co-Authored-By: AI

* test(mail): add unit tests for signature patch operations

Test insert_signature and remove_signature ops:
- Insert into basic HTML body
- Insert before quote block (reply/forward)
- Replace existing signature
- Error on plain-text-only draft
- Remove existing signature
- Error when no signature present

Change-Id: Icd713552b130d6eb461ef1cabca61e82327f4f0b
Co-Authored-By: AI

* fix(mail): address reviewer findings on signature PR

- Remove --device flag and device field from docs (not exposed in CLI)
- Fix signature interpolation to match --from alias address in send_as
  list, instead of always using the primary mailbox address
- Update lark-mail-signature.md reference doc

Change-Id: I65f41a029cd33b17785e2355a99d042063962d23
Co-Authored-By: AI

* fix(mail): resolve lint issues — remove unused code, fix gofmt

- Remove unused cidSrcRe, collectSignatureCIDs, isCIDReferencedInHTML
  from signature_html.go (CID logic lives in draft/patch.go)
- Remove unused strings import
- Run gofmt on all affected files

Change-Id: Ie142744a7ab17acf440dc69a5a78cefb3ce6c341
Co-Authored-By: AI

* fix(mail): use draft From address for signature interpolation in +draft-edit

Moved signature resolution after draft fetch+parse so insert_signature
reads the From header from the existing draft. This ensures alias and
shared-mailbox senders get correct template variable values (B-NAME,
B-ENTERPRISE-EMAIL) instead of falling back to the primary address.

Change-Id: I917016b17176090124814f30e8e15c67f1604de0
Co-Authored-By: AI
2026-04-15 17:44:59 +08:00
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