Note that every graph snaps from the start (#391)

- Behaviors: the magnet is on by default in every graph tab.
- Architecture: SnapToggle and GRAPH_SNAPS_AT_FIRST.
- Development: the harness switches the magnets off on every load,
  and 1966 editor checks.

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

Architecture.md

@@ -373,7 +373,7 @@ src/editor/graph/      GraphEditor (header, breadcrumb), GraphCanvas and what it
                        the edges); graphView (zoom limits, grid, panAndZoom — shared with NodeBoard and the Tile tab's TileCanvas — and `inView`, which nodes are in the picture, #292), EdgeLayer (curves and fold marks), graphMenus,
                        NodeView (and a face instead of the rows, a widget between the inputs and the outputs, #380: `nodeFace.ts`) + portRow (how an input and an output share one row, #306), 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)
+                       SnapToggle (the magnet every tab that snaps carries, the vector art tab included, #194; lit at first in the graph tabs, `GRAPH_SNAPS_AT_FIRST`, #391)
 src/editor/container/  ContainerEditor (header), ContainerCanvas (a SceneViewport on a template)
 src/editor/texture/    SheetCanvas (the shell of the Texture, Pixel art and Vector art canvases: ground, clip, hint, a middle or Shift drag that pans, wheel zoom, Fit and the view each document keeps, and the dashed nine-slice and sort lines of a drawing, #308), TextureEditor (header), TextureCanvas (picture + frames), SliceDialog (a FormDialog), GenerateCollisionDialog (#161: the rows, and a summary that traces while the numbers change; the texture library hands it the sheet's pixels), sheetView (the grid maths),
                        ImagePicker + imageGrid (the "+ → Texture" dialog), checker (the transparency board)

Behaviors.md

@@ -619,7 +619,7 @@ the inspector).
   the box drawn around them, and a graph holding nothing but a comment would frame the empty
   origin; `editor/framing.ts`), and the size of the graph as "N nodes · M links". It stops zooming
   out at 0.125 (0.25 before #387), so a box parked far enough away can still lie outside what a fit can show.
-- **Snap** (the magnet in the header, an icon toggle that stays lit while on; off by default): a drag drops each node it carries on the nearest
+- **Snap** (the magnet in the header, an icon toggle that stays lit while on; **on by default in every graph tab** since #391, a curve and a vector art still start without it): a drag drops each node it carries on the nearest
   24 px grid line — the same grid the background draws. It takes effect on the next drag only, so
   switching it on never shuffles a graph that is already laid out, and a node nobody drags never
   moves. Every node of a selection snaps **for itself**, so dragging a group is how you line one

Development.md

@@ -19,7 +19,7 @@ php tests/php/accounts.test.php                               # the API's accoun
 php tests/php/snapshots.test.php                              # the snapshot store (#231), the same way
 php tests/php/releases.test.php                               # the release store (#266), the same way
 php tests/php/files.test.php                                  # uploaded files in a folder per account (#344), the same way
-node tools/seed-e2e.mjs && node tools/e2e.mjs                 # 1965 editor checks, screenshots in /tmp/gm-e2e-*.png
+node tools/seed-e2e.mjs && node tools/e2e.mjs                 # 1966 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
@@ -93,6 +93,12 @@ scene state and share the CDP driver in `tools/lib/harness.mjs` — `press`, `un
 `object(id)`, `world()`, `mutate(js)` and friends, so a check reads like the interaction it
 exercises.
 
+**Every load starts from the same baseline.** After each `navigate()` the harness sets the zoom
+transition to 0 and switches the magnet of every graph tab off (#391): the graphs snap by default,
+but most checks drag a node to an exact spot. What the magnets started at stays readable through
+`graphSnapAtFirst()`, and e2e 06 checks that all eight were on. A step that brings the editor up
+some other way (the sign-in in e2e 45) switches them off itself with `__gm.graphSnapping(false)`.
+
 **The suite waits for the editor, not for the clock (#93).** Every action in the harness — `click`,
 `doubleClick`, `wheel`, `drag`, `press`, `typeText`, `select`, `mutate`, `undo`, `redo`, `showTab` —
 ends in `settle()`, which waits for two *drawn* frames (~32 ms) through `__gm.afterFrames()` rather