v0.4.19

## Changelog
* a4dc54f2eda823224a4a67da8efab94fe9c2e326 MUL-5570 / MUL-5493: feat(chat): add a managed follow-up queue (#6211)
* b98f760f1fab888565e4003a1ebbc4ec206ab4e5 MUL-5604: 支持 Reasonix runtime (#6370)
* 79c5832e1dbcae08e8e75f6c6ca8e582629b54db MUL-5708 fix(taskfailure): classify response-side context-window overflow (#6366)
* d8ae2005f1d11fff9a70a4fb327364f87ebb8c98 MUL-5713: fix mobile issue detail spacing (#6415)
* 86f255658fcce058c6396f8830debdc92d7382ea MUL-5730 feat(server): expose chat audience without bloating prompts (#6428)
* 73283556d7b463d863d425c3b19e4a6b32977165 MUL-5750: fix(chat): keep idle sends out of follow-up queue (#6418)
* 3a28474100f0441d3f28c25584f1e35467223707 MUL-5756: 更新 Reasonix runtime 的 logo (#6423)
* 642b6942d7dc3a3680695c84df7f2c58c022768a MUL-5760: align chat queue UI with desktop reference (#6430)
* c1be369f6d3f54733a168c616a9e81b947f790e3 [MUL-5736] fix(channel): make issue commands terminal outcomes (#6398)
* 6de49b73d6d3f58a91a9a1611f534df52bc5c421 docs(changelog): add v0.4.19 release entry (2026-08-05) (MUL-5766) (#6441)
* 1046e6fd1fd78dd77caa8042964173f8f5a02c10 docs(desktop): distinguish Desktop desktop.json from the CLI config (MUL-5737) (#6416)
* 3e1a7e0404ce1a0a5461fc8afdcfdc2cd222bc60 feat(editor): MUL-5752 image preview prev/next navigation (#6424)
* e3bf9ccd43f183e8985a86d6f6cd0cd7b42e9418 feat(i18n): translate issue as the local word for "task" (MUL-5703) (#6362)
* 7ccf446b04a5c8a8bb156371bb12a2fd1ed23199 feat(issues): add header thread navigator to issue detail (#6426)
* 6b5d26b235360794c1c72c261a2234a21b3b3c7a feat: add QwenPaw ACP backend support (MUL-5355) (#5986)
* c1bd4f995c0552582b149e35080918bba551d5b1 fix(agent): fail a run whose provider session ran out of context (MUL-5739) (#6422)
* a23b936b7b65a7446d3c16b5b713ae5cc28c1a17 fix(agent): raise the agent stream scanner cap to 32 MiB and share it (MUL-5722) (#6383)
* 398b7fd06c28b9a9db729bb716dbb42e731b70a1 fix(agent): rank Copilot usage sources, fix model attribution, surface the token gap (MUL-5712) (#6373)
* c896f677d505dbb68c1644719c4db50e1e3e9097 fix(agent): recover from a codex resume that overflows the reader (MUL-5722) (#6420)
* c6c3be5935c9791d63a22cb04f2ab84aecec119d fix(autopilot): invalidate empty cache for scheduled tasks (MUL-5747) (#6410)
* a8d5daac50c48f0fd7aa6b36d264303435937b11 fix(chat): decouple the follow-up queue card from the composer chrome (#6444)
* b3fa17f0e0101f43442885fc2304fe1814b30186 fix(chat): preserve follow-up transcript order (#6419)
* 521a63671c85bda5b379eac5499f1e622b63d40d fix(chat): preserve visible queue-head ordering (MUL-5751) (#6431)
* 3371b445bf2ef8af8c7f17609c51dda8e76df5b0 fix(desktop): return to the last visited tab on close (MUL-5665) (#6437)
* 34e34d44c699dd2327655438c8fca9685675d671 fix(editor): MUL-5752 follow-ups — header sequence navigation, snap re-fit (#6435)
* 918803f9a41e3271079950a8bf88a4a60ee8910d fix(execenv): preserve colliding QwenPaw skills (#6396)
* c98a01b3df9124c6a0e86d4384a2140b7f0af1bb fix(issues): unsubscribe in one click when an issue has no sub-issues (MUL-5714) (#6380)
* 2bb13667c6331fee0ff0547c97d2b2e237a71242 refactor(daemon): cross-channel command dedup — brief states the loop, per-turn carries the commands (MUL-5442) (#6421)
* 18f8f78af5908594c68d952fc9ec936d3d9985f1 refactor(daemon): per-turn message slimming — OPT-1 UUID dedup + OPT-2 initiator prose (MUL-5721) (#6382)
* c3aab05a38456ca00f2a87c678f346f5833381ee refactor(daemon): rewrite Background Task Safety to its judgment form (MUL-5442) (#6381)
* 1e661bb04bdd87892c03e638c6e69570b2c5c05e refactor(daemon): stage-1 judgment rewrite — mode router and small guardrail sections (MUL-5442) (#6365)
* aaedb864a01a5c744179334f9d5da3c5658bf8ee refactor(diagnostics): drop the dead hang telemetry (MUL-5345) (#6433)
* 0c60d9ff98595c410868fdcabcc386520dc853d2 test(views): cover project detail deletion flow (#6392)