Architecture: a pan only moves the camera

- Architecture names moveCamera and when a pan still takes the full
  redraw.
- Development: check total 1285.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

Architecture.md

@@ -152,7 +152,9 @@ src/editor/plugins/    startPlugins (list, import, host; runs before the first p
                        running plugins match what the project asks for, order, checks, what became of each file), pluginApi
                        (API v1, the per-plugin scope), PluginsPane (the Plugins tab), NodeBoard (api.ui)
 src/editor/viewport/   WorldViewport base → FreeViewport (a camera of its own: fit, pan, wheel zoom) → SceneViewport, PreviewCanvas;
-                       GameViewport follows the game's camera instead — editing tools, hence not in src/viewport/
+                       GameViewport follows the game's camera instead — editing tools, hence not in src/viewport/.
+                       A pan only moves the world and redraws the screen-space overlays (`moveCamera`); a full
+                       `redraw()` follows only when an object crosses the edge of the view
 src/editor/inspector/  Inspector panel, host (what a section builds into), field factory, previewHandlers (scrub → preview → command), valueSpecs
                        (where a value lives — shared with the List tab),
                        one section per selection kind (asset/object/node/frame/shape), variableRows (one row shape for

Development.md

@@ -13,7 +13,7 @@ npm run check        # typecheck + lint + format:check + tests, the gate CI runs
 npm run build        # writes dist/ and regenerates index.html
 ./build.sh           # the same under `set -o pipefail`, for callers that pipe the output
 php tools/make-user.php <name> <password>                     # an account; every tool signs in (see Accounts)
-node tools/seed-e2e.mjs && node tools/e2e.mjs                 # 1282 editor checks, screenshots in /tmp/gm-e2e-*.png
+node tools/seed-e2e.mjs && node tools/e2e.mjs                 # 1285 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