feat(canvas): Add DePIN Node WaveMode — Docker management + live stats panel (Shift+D)

New `depin` WaveMode in Trinity Canvas for managing DePIN node directly from
the UI. Press Shift+D to open a control panel showing node status, earnings,
and infrastructure stats with Start/Stop/Claim/Dashboard buttons.

- Add depin variant to WaveMode enum with green-yellow hue
- Add 6 backend functions: depinCheckDocker, depinCheckRunning, depinStartNode,
  depinStopNode, depinPollStats, depinClaimRewards (all via std.process.Child)
- Add two-column render block (EARNINGS | INFRASTRUCTURE) with pulsing status
  indicator, uptime bar, and manual button rendering
- Add 10s polling timer for live node stats via curl to localhost:8080
- Add startup Docker detection
- Fix 60+ duplicate member errors in golden_chain.zig (pre-existing)

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

Author: gHashTag