Architecture graph visualization: interactive graphs (v0.2.3)

[s1rry]

What

Surfaces the Architecture Engine visually: a new Architecture tab renders the four graphs from analyze_architecture interactively. No new dependencies.

• Interactive SVG graph: dependency-free force-directed layout (compact Fruchterman–Reingold), with pan (drag background), zoom (wheel) and node dragging.
• Graph selector: Dependencies / Modules / Folders / Calls, each with a node count.
• Nodes colored by kind (File, Module, Directory, Function, External) with a legend; directed edges with arrowheads; labels for small graphs, hover tooltips otherwise.
• Large graphs are truncated to the most-connected nodes (cap 250) for responsiveness, with a notice.
• New features/architecture slice with its own Zustand store; the layout is a pure function (layout.ts). Added an "Architecture" nav item.

Verification

• pnpm build (tsc strict + vite): clean, no any.
• Rendered live in the Vite preview: seeded a dependency graph of ~12 files + 2 external deps — force layout positions nodes, lib.rs lands central as the most-connected, edges show direction, legend and graph tabs with counts render. No console errors. Screenshot captured.

Live analysis runs against analyze_architecture in pnpm tauri dev.

🤖 Generated with Claude Code