Architecture, Videos: a fixed editor size with ?w=&h=

- Architecture names ?w=&h= next to the other query parameters.
- Videos says how it sets the size of an editor recording.
- Development counts the new e2e check 62d.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

Architecture.md

@@ -5,6 +5,8 @@
   frames skip the compositor queue, so the UI keeps up with the pointer (click to picture measured
   72-77 ms before, 16-18 ms after). The price is possible tearing while things move fast;
   `?vsync` falls back to Pixi's own context. A browser without the mode simply ignores it.
+  `?w=1920&h=1080` lays the canvas out at that size in CSS pixels instead of the window's
+  (`ui/pageSize.ts`). A smaller window shows it shrunk to fit, the editor and a released game alike.
 - **Rapier 2D** (`@dimforge/rapier2d-compat`, WebAssembly) — the physics engine. Pixi draws only, so
   bodies, forces and contacts come from here (#144). It is a chunk of its own (about 790 KB gzip) that
   `runtime/physics/engine.ts` loads once in the background after the editor has opened its project,

Development.md

@@ -21,7 +21,7 @@ php tests/php/releases.test.php                               # the release stor
 php tests/php/files.test.php                                  # uploaded files in a folder per account (#344), the same way
 php tests/php/videos.test.php                                 # the video store, its queue and the worker (#402), with the
                                                               #   real ffmpeg: the CI image and game-maker-video have it
-node tools/seed-e2e.mjs && node tools/e2e.mjs                 # 2039 editor checks, screenshots in /tmp/gm-e2e-*.png
+node tools/seed-e2e.mjs && node tools/e2e.mjs                 # 2040 editor checks, screenshots in /tmp/gm-e2e-*.png
 GM_STEPS=20 node tools/e2e.mjs                                # or 1-12, or 6,20 — a subset while working on one step
 ./e2e.sh start [GM_STEPS]                                     # the same run detached, see below
 ./e2e.sh status                                               # live progress, or the last run's result

Videos.md

@@ -220,6 +220,9 @@ beside the menu button.
 - **It costs no second drawing.** The frame is copied from the canvas right after the editor drew
   it. An idle editor draws nothing, and the recording repeats its last picture.
 - **A resized window** is fitted into the size the recording started with, centred, the rest dark.
+- **A size of its own:** open the editor with `?w=1920&h=1080` and its canvas is laid out at that
+  size, whatever the window. A smaller window shows it shrunk to fit, a larger one centred at full
+  size. The recording is that size times the screen's scaling (up to 2): at 100 % exactly 1920*1080.
 - It runs on through Play and Stop, beside a recording of the game view if a game starts one.
   Saving is the same: up to the server, then a video asset once the editor is not playing.