Contribution source: 1a669130fb6d2b65279aab3847e966a1a282c191, based on published preview 715036e132677dd2bc2fb37ed316d93dc9987aec. This is branch-specific Windows evidence for issue 40. It is not acceptance of an integrated release or the complete application. The decision and native baseline explain the repair.

Environment and commands

Windows 10.0.26200, Rust/Cargo 1.98.1, host/target x86_64-pc-windows-gnullvm, LLVM 22.1.8, LLVM-MinGW 20260908 UCRT linker clang.exe, CARGO_BUILD_JOBS=1, CARGO_INCREMENTAL=0, default development profile. Run at the identified source with the Windows GNU LLVM toolchain and its linker/runtime available on PATH. A sparse checkout must include build and harness/fixtures as well as crates. The actual commands were:

cargo test --locked --offline -p oa-desktop allocation_drag -- --test-threads=1
cargo clippy --locked --offline -p oa-desktop --all-targets -- -D warnings
cargo build --locked --offline -p oa-desktop --bin arcadia-studio

Offline commands require dependencies already cached. A fresh environment must fetch the locked dependencies first. Raw logs retain original absolute paths; these paths identify this run, not required directories on another machine.

Results and boundaries

Test-only successor 24b1eab07d306d8cb091bb46f7daf9f027a8f1c0 adds two OA/SA App regressions: a clearance proposal blocked by unrelated work and an outgoing move with a retained sibling enlarging the source enclosure. tests-04.log passes all 123 allocation-drag tests (zero failed/ignored, 1,424 filtered) in 54.86s; clippy-02.log passes the same strict command in 1m27s. Production inputs are unchanged from 1a669130; its normal binary remains the native candidate. Independent review covers the source, new test design and evidence limits.
tests-03.log: 121 passed, zero failed/ignored, 1,424 filtered; 35.33 seconds test execution. This is the allocation-drag subset, not the full desktop suite.
clippy-01.log: strict desktop all-target Clippy passed in 4m30s.
build-01.log: normal GUI build passed in 5m16s. The resulting local executable SHA256 is 9bda1a6a1d24fdc98c7a8822400c12fea9afe1de828a82ba9273f03b99e47c07. It was staged with the published preview's libunwind.dll and started, but Computer Use was stopped before any changed-binary native observation.
context.json: recorded source/toolchain, passing test-log and baseline-image hashes, and clean source after the test run.
tests-01.log: compilation failed before tests because build/windows_manifest.rs was excluded from the initial sparse checkout.
tests-02.log: compilation failed before tests because harness fixture files were excluded and a standalone test helper used Self instead of Fixture. The compiler was terminated after reporting errors; its interrupted exit is preserved. The missing tracked files and typo were repaired before run 03.

The tests exercise source-clearance proposals, OA/SA App event sequences, preview/release agreement, exact source/history, cancellation, and retained preview without commit authority on refused release. Existing collision and semantic checks still govern all proposals. Independent source review found the whole-header viewport restriction and obsolete preview assertion; both were corrected before the passing run. This is source/test review, not native review.

baseline-left-refusal.png is an unmodified actual native capture from the published preview executable, SHA256 2c03bd6cc3f1110c219e4f57ab94874a121590f83779239a93289b7170664399. In the copied Allocation companion fixture, OA assign view at 1440x900 content and Fit 72%, dragging X from window (486,546) to (365,546) leaves allocation and placement unchanged and reports overlap. A control drag to (625,572) removes allocation, and Undo restores it. Intermediate jitter was diagnosed from source; this image is end-state evidence only.

Changed-binary native acceptance is still required: repeat the short fitted-view drag, identify and regrab the partially clipped card, check refused-motion feedback, Cancel and Undo/Redo, save the full bundle, close and reopen in a fresh process, and verify identity/allocation/placement and unchanged sibling data for OA and SA. Linux/WSL remains deferred by the user. No published package changed.