Media pager: the slide meant stays on screen through a resize, from the first moment. The pager's resize handler re-showed pager.cur, which the slide observer sets a frame after the pager opens — so a resize in that first frame (the page going full screen for the pager, as the player's full-screen button does: a taller window, the address bar gone) had nothing to re-show, and the pager was left to the browser's re-snap. Now the slide meant is an anchor: the start slide the moment the pager opens, then each slide arrived at; a resize re-shows it (or the tail, when the reader is waiting there), and an arrival the observer reports at a size other than the one the pager last laid out at is taken as the resize's doing, not the reader's: the anchor goes back instead. Hardening: Adam's full-screen button on a clip 23 posts down showed another post's still, which a headless run of the same path (a user-gesture requestFullscreen on the feed clip) and tools/pager-resize-test.js (the window grows as the pager opens, shrinks and grows again, changes shape) did not reproduce; the recorder on his tab is for the next time.

Co-Authored-By: Claude Fable 5.1 <[email protected]>
Claude-Session: https://claude.ai/code/session_01J1Kon8bxJoHRpJdSzshCkp

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