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>

.gitignore

@@ -33,4 +33,12 @@ tmp/
 temp/
 *.kate-swp
 test_results
-test-results
+test-results
+
+# graphify knowledge graph — exclude derived/cache files
+graphify-out/cache/
+graphify-out/graph.html
+src/graphify-out/
+
+# Claude Code local settings (machine-specific)
+.claude/settings.local.json