feat(docker): add multi-stage Dockerfile and docker-compose for Windows

[hoklims]

Summary

• Add multi-stage Dockerfile (Bun frontend + Node sidecar + Rust backend + Debian slim runtime)
• Add docker-compose.yml with Windows-compatible volume mounts (%USERPROFILE%/.claude)
• Add .dockerignore for fast build context

Motivation

claude-view currently only runs on macOS. This adds Docker support so users on Windows (and Linux) can run the full dashboard via Docker Desktop with a single docker compose up.

Verified working on Windows 11 with Docker Desktop — indexes 463 sessions, live monitor, analytics, and Claude CLI detection all functional.

Architecture

Stage 1 (frontend)  → oven/bun:latest      → vite build → dist/
Stage 2 (sidecar)   → node:22-slim         → tsup build → dist/
Stage 3 (backend)   → rust:1.88-slim       → cargo build --release
Stage 4 (runtime)   → debian:bookworm-slim → binary + assets + Claude CLI

docker-compose mounts:

• ~/.claude → /root/.claude (session data, r/w for hook registration)
• Named volume claude-view-data → /data (DB, search index persistence)

Dependencies

Depends on #23 (CLAUDE_VIEW_SKIP_PLATFORM_CHECK and CLAUDE_VIEW_BIND_ADDR env vars).

Test plan

• docker compose build succeeds (4-stage parallel build)
• docker compose up starts server on port 47892
• /api/health returns {"status":"ok"}
• Sessions indexed from Windows host ~/.claude/projects/
• Live Monitor displays active sessions with tasks and sub-agents
• Analytics page renders with full history data
• Claude CLI detected inside container (no "CLI Missing" warning)
• Verify on Linux host (untested, should work)

🤖 Generated with Claude Code

[tombelieber]

Thanks! Would it be possible to decouple Docker and Windows support for now? The app is currently tightly bound to macOS, and I'm concerned Windows might introduce stability issues we're not equipped to handle at this stage.

[hoklims]

Makes sense, you're right that bundling Windows into this was too much at once. I've pushed a cleanup — all the Windows runtime stuff is gone now (the taskkill/sysinfo abstractions, TCP sidecar mode, the whole dual-mode plumbing).

What's left is purely Docker: the Dockerfile, compose file, and the two env vars needed to run in a Linux container (SKIP_PLATFORM_CHECK and BIND_ADDR). The platform.rs file is still there but it's just Unix implementations with compile stubs — no Windows runtime code.

Also addressed the Copilot remarks along the way: claude-code was already pinned, runtime Node matches the sidecar build target, and the compose file now defaults to $HOME instead of $USERPROFILE.

Happy to adjust if anything else stands out.

[tombelieber]

@hoklims Great thx, will do a review and merge this week. Thx for the contribution.