Describe the split of the four largest files (#215)

Architecture.md

@@ -106,7 +106,10 @@ src/runtime/physics/   engine (loads Rapier once, reports its state, converts be
                        the fixed step, the poses handed back, the contact pairs sorted into events and their
                        normal, impulse and point; whether a dynamic body lands on or passes a one-way collider,
                        decided before each step for the contact hook; the push a `Move` gives a dynamic body, and
-                       what the physics nodes reach through `NodeContext.physics`)
+                       what the physics nodes reach through `NodeContext.physics`), oneWay (the rule itself:
+                       whether a body lands on, is held by or passes a one-way collider — pure, so it is measured
+                       without the engine), bodyGeometry (a world shape as the engine colliders of a body, and the
+                       poses handed between the two)
 src/ui/                widget toolkit (generic, knows nothing about assets); fonts (the faces the editor ships:
                        Source Sans 3 in 400, 500, 600 and 700, Source Code Pro 400, Latin only, #202/#214), icons +
                        Icon (the menu's tick boxes and current-entry dot as SVG files, and a widget that shows one file
@@ -135,7 +138,9 @@ src/editor/            App → Editor (layout + ticker), PlaySession (the run),
                        OpenProjectDialog (the project picker behind "Open project…"),
                        ProjectSettingsDialog + settingsChanges (name, the start-scene switch and the collision
                        layers in one dialog; the pure rule of what Apply has to carry out),
-                       EditorRun (run in editor), state, actions, shortcuts, debugHook,
+                       EditorRun (run in editor), state, actions, shortcuts, debugHook (installs `window.__gm`;
+                       the hooks are grouped by area in debug/: ui, scene, graph, documents, pixel art, vector art,
+                       render — `tools/` sees one flat object as before),
                        textProbe (finding widgets by their text — the ground floor of the test hook, shared with the sign-in screen),
                        auth/LoginScreen + auth/PasswordDialog + auth/loginRules + auth/FormStatus (the sign-in screen and the change-password dialog in the canvas, what either may complain about, and the warning line and busy state both show, #177/#182), autosave,
                        polygonEdit (points of an outline: what is under the pointer, whether a point is inside,
@@ -159,7 +164,11 @@ src/editor/plugins/    startPlugins (list, import, host; runs before the first p
 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/.
                        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
+                       `redraw()` follows only when an object crosses the edge of the view.
+                       The scene view's tools keep their own state and reach the view through `SceneViewHost`:
+                       tilemapPainting (brush, eraser, rectangle, fill and pick on the selected map),
+                       polygonCorners (a polygon collider's corner handles, #151), tilemapSolids (where a placed
+                       map blocks, outlined like a collider, #132/#173)
 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
@@ -176,9 +185,13 @@ src/editor/panels/     AssetPanel, assetGroups (groups by type and their order,
                        markIcons (the kind marks, the row actions reset, apply and the two fit arrows, and a
                        transition's in/out arrow — they were characters the bundled font does not have, #214),
                        TilemapPanel (tools, tiles and layers of the one selected tilemap, beside the scene view, #142;
-                       painting itself is SceneViewport)
-src/editor/graph/      GraphEditor (header, breadcrumb), GraphCanvas, graphView (zoom limits, grid, panAndZoom — shared with NodeBoard and the Tile tab's TileCanvas), EdgeLayer (curves and fold marks), graphMenus,
-                       NodeView, NodePalette + paletteEntries (which also ranks a search), folding (hidden links, collapsed nodes), Breadcrumb + trail (the path into nested behaviors), beads (the run's pulses),
+                       painting itself is `viewport/tilemapPainting`)
+src/editor/graph/      GraphEditor (header, breadcrumb), GraphCanvas and what it lends its gestures through
+                       `GraphCanvasHost`: wiring (making edges — a drag from a pin, the palette a drop into
+                       empty space opens, a transition armed from a state's menu), graphDrags (nodes, groups and
+                       comments moved or resized, each gesture one undo step), annotationLayer (the boxes behind
+                       the edges); graphView (zoom limits, grid, panAndZoom — shared with NodeBoard and the Tile tab's TileCanvas), EdgeLayer (curves and fold marks), graphMenus,
+                       NodeView, NodePalette + paletteEntries (which also ranks a search), folding (hidden links, collapsed nodes), Breadcrumb + trail (the path into nested behaviors), beads (the run's pulses and the clock that launches them),
                        AnnotationView + annotationDrag (groups and comments: what a drag carries, each thing moved once),
                        SnapToggle (the magnet every tab that snaps carries, the vector art tab included, #194)
 src/editor/container/  ContainerEditor (header), ContainerCanvas (a SceneViewport on a template)

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                 # 1313 editor checks, screenshots in /tmp/gm-e2e-*.png
+node tools/seed-e2e.mjs && node tools/e2e.mjs                 # 1314 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