DingTalk bot unbind was routed through the generic adapter config update,
but undefined credential fields are dropped during JSON serialization. That
left stored Client ID and Secret values intact after clicking the unbind
button. Match the working WeChat path with a dedicated server endpoint and
frontend API call so credential removal is explicit.
Constraint: JSON request bodies cannot preserve undefined fields for generic config clearing
Rejected: Keep using updateConfig with undefined fields | serialized requests omit the fields before the server can clear them
Confidence: high
Scope-risk: narrow
Directive: Keep credential-clearing flows on explicit unbind endpoints rather than relying on partial config merges
Tested: bun test src/server/__tests__/adapters.test.ts
Tested: cd desktop && bun run test src/stores/adapterStore.test.ts
Tested: bun run check:desktop
Tested: bun run check:server
Not-tested: bun run quality:pr is blocked by repository policy requiring allow-cli-core-change approval for the broader branch impact
WeChat and DingTalk were using different pairing, attachment, and response
state paths, which made the new IM channels behave differently from Feishu
and Telegram. Align the shared pairing model, wire inbound media into the
existing attachment bridge, and map platform response capabilities to their
real APIs: WeChat block streaming plus typing, DingTalk AI Card streaming.
Constraint: WeChat iLink exposes typing and block streaming, but no editable message/card streaming API
Constraint: DingTalk streaming depends on the AI Card create/deliver/stream/finalize lifecycle
Rejected: Fake DingTalk typing with standalone markdown | it would add chat noise instead of platform state
Rejected: Auto-pair WeChat after QR login | it bypasses the shared IM pairing model
Confidence: high
Scope-risk: moderate
Directive: Keep WeChat streaming as block-send unless iLink adds editable messages; keep DingTalk streaming on AI Card APIs
Tested: bun run check:adapters; bun run check:server; cd desktop && bun run test src/stores/adapterStore.test.ts; cd desktop && bun run build; bunx tsc -p adapters/tsconfig.json --noEmit; git diff --check
Not-tested: Live WeChat and DingTalk platform smoke with real production credentials
