Feat v0.4.7 note graph

Canvas force-directed graph view for notes surface. GET /graph API
endpoint returns all non-archived notes as nodes (with tags) and
resolved wikilinks as edges. Force simulation with repulsion,
attraction, and center gravity. Click focus dims unconnected nodes,
shift+click chains neighborhoods, double-click opens note. Hover
tooltips show title, tags, and connection count. Nodes colored by
folder (10-color palette), tag filter dims non-matching. Orphan
nodes shown with dashed stroke and hide toggle. Zoom/pan via scroll
wheel and mouse drag. Retina-aware canvas rendering with CSS
variable resolution via getComputedStyle.

Notes package 0.7.0 → 0.8.0.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

CHANGELOG.md

@@ -2,6 +2,39 @@
 
 All notable changes to Switchboard Core are documented here.
 
+## v0.4.7 — Note Graph
+
+### Added
+
+- **Graph API**: `GET /graph` endpoint returns all non-archived notes as nodes
+  and resolved wikilinks as edges in a single payload. Nodes include id, title,
+  folder_id, and tags. Edges include source, target, and link text.
+- **Graph view**: Canvas-based force-directed graph visualization replaces the
+  editor pane when "Graph" button is clicked in the topbar. Force simulation
+  uses repulsion (all pairs), attraction (edges), and center gravity with
+  velocity damping. Supports zoom (scroll wheel) and pan (mouse drag).
+- **Click focus**: Single-click a node to dim unconnected nodes/edges to 15%
+  opacity; clicked node and direct neighbors stay at full brightness. Edges
+  between focused nodes highlighted. Click empty space to reset.
+- **Shift+click chain**: Hold shift and click a second node to union both
+  neighborhoods — trace thought paths across two hops.
+- **Double-click open**: Double-click a graph node to navigate to that note in
+  the editor. Graph view closes, editor opens with the selected note.
+- **Hover tooltips**: Hovering a node shows title, tag pills, and connection
+  count in an HTML overlay (no additional API calls).
+- **Folder coloring**: Nodes colored by folder using a 10-color palette.
+  Unfiled notes shown in gray.
+- **Tag filter integration**: Active tag filter dims non-matching nodes to 30%
+  opacity, stacking with click focus.
+- **Orphan highlighting**: Notes with zero connections shown with dashed stroke.
+  "Hide orphans" checkbox in toolbar to toggle visibility.
+
+### Changed
+
+- Notes package version bumped from 0.7.0 to 0.8.0.
+- Topbar gains a "Graph" toggle button alongside "New Note" and "Import .md".
+
+
 ## v0.4.6 — Sidebar Restructure
 
 ### Added