fix: preserve video aspect ratio while resizing queue window

README.md

@@ -59,6 +59,8 @@ Use the titlebar's **Queue** icon or **View → Show Queue** to show the editabl
 
 In a normal window, showing the queue expands the window outward while preserving the video's size; hiding it removes that extra width. The sidebar meets the video directly, without a separate divider gap. The window shifts left when necessary near the screen's right edge. Fullscreen keeps its fixed bounds.
 
+Resizing with the queue open preserves the video's aspect ratio while keeping the sidebar at a fixed width; closing the queue retains ordinary aspect-locked video resizing.
+
 While the sidebar is open, its persistent top header holds the queue count, queue toggle, pin, Cast and settings controls; these do not fade with the video controls. Closing the sidebar returns those controls to the auto-hiding video titlebar. Space and configured playback shortcuts continue working with queue-list focus; Tab navigation, deliberately focused buttons/sliders and text entry keep their native keyboard behavior.
 
 Playback advances automatically and stops at the end, without wrapping. **Previous Queue Item** and **Next Queue Item** are available in the sidebar and Playback menu and are disabled at their respective ends. Reordering or removing another item does not interrupt playback; removing the current item plays its next neighbor, or stops if there is none. A playback error stays on that item rather than skipping it.
@@ -157,7 +159,7 @@ The full suite requires a graphical macOS session and a working audio device; it
 
 The startup checks verify that playing video remains attached, unhidden and sized to its native drag surface, including with the queue open; playback-state checks alone do not establish renderer visibility.
 
-Queue-open resize checks also require positive native resize increments: clearing AppKit's aspect ratio alone leaves zero increments after aspect-locked video. Physical edge-drag resizing still needs manual verification.
+Queue-open resize checks require positive native resize increments and exercise horizontal/vertical resize-delegate proposals to preserve video aspect independently of the fixed-width sidebar. Physical edge-drag resizing still needs manual verification.
 
 `make benchmark-playback` measures cold source startup, cached/uncached seeks, and sustained native/Cast playback with repeatable loopback fixtures. It requires the same macOS session/audio device and fixture-generation FFmpeg; results exclude live extraction, WAN/TLS, and physical-receiver latency.
 The [benchmark runner](Checks/playback-benchmark.py) accepts `--compare-native <baseline-binary>` for alternating native-only comparisons; add `--seek-work` to isolate cache-miss seeks when both binaries support that mode. Preserve the baseline executable before rebuilding.