[Bug] Claude stops mid-task and marks completion prematurely without finishing requested work

**Bug Description**
ia decidindo fazer o trabalho pela metade quando foi solicitado o trbalho completo e ela finalizando como se tivesse pronto e ela mesmo falando oque deixou de fazer

**Environment Info**
- Platform: win32
- Terminal: windows-terminal
- Version: 2.1.275
- Feedback ID: 79c9f583-1c21-48f5-ab4b-1a022d3492c0

**Errors**
```json
[{"error":"TelemetrySafeError: VirtualMessageList: itemKeys/messages length desync (keys=100 messages=99 range=[69,100))\n at cZt (B:/~BUN/root/chunk-rg5h5chp.js:37:31015)\n at Fve (B:/~BUN/root/chunk-rg5h5chp.js:37:21914)\n at Xs (B:/~BUN/root/chunk-73r1drq4.js:18:20036)\n at fu (B:/~BUN/root/chunk-73r1drq4.js:18:38202)\n at pm (B:/~BUN/root/chunk-73r1drq4.js:18:84284)\n at Eb (B:/~BUN/root/chunk-73r1drq4.js:18:83284)\n at wu (B:/~BUN/root/chunk-73r1drq4.js:18:83113)\n at sm (B:/~BUN/root/chunk-73r1drq4.js:18:79637)\n at ft (B:/~BUN/root/chunk-73r1drq4.js:18:6261)\n at Jn (B:/~BUN/root/chunk-73r1drq4.js:18:4792)","timestamp":"2026-09-18T00:04:07.249Z"}]
```

Start by reproducing the report on win32 with Windows Terminal using version 2.1.275, then review the VirtualMessageList error and Feedback ID 79c9f583-1c21-48f5-ab4b-1a022d3492c0. The investigation is complete when the cause of premature task completion and the itemKeys/messages desync is identified and a reliable fix or reproduction is documented.

Written by the indexing model from the issue text.