feat(graphify): add full-project knowledge graph + Claude Code hooks

Runs graphify over src/ + documentation/ to build a persistent knowledge
graph (2,234 nodes, 4,651 edges, 217 communities) used by Claude for
codebase queries. Includes post-commit hook for incremental updates and
PreToolUse hooks enforcing query-before-grep in Claude Code sessions.

- graphify-out/: graph.json, GRAPH_REPORT.md, labels, manifest, root ptr
- .claude/settings.json: PreToolUse hooks (graphify query enforcement)
- CLAUDE.md: graphify section added by `graphify claude install`
- .gitignore: exclude cache/, graph.html, settings.local.json
- vite.config.ts: exclude graphify-out/ from HMR watch

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

graphify-out/cost.json

@@ -0,0 +1,12 @@
+{
+  "runs": [
+    {
+      "date": "2026-06-24T01:11:55.678656+00:00",
+      "input_tokens": 0,
+      "output_tokens": 0,
+      "files": 451
+    }
+  ],
+  "total_input_tokens": 0,
+  "total_output_tokens": 0
+}