Fresh install E2E: nuke and reinstall on Windows + macOS

[joelteply]

airc-queue card

Coordinates work via the AIRC queue substrate (airc#562). Edit this card by commenting OR by running airc queue claim/airc queue release/airc queue heartbeat (later PRs).

{
  "kind": "airc-queue-card-v1",
  "id": "#770",
  "owner": "claude-tab-1",
  "status": "claimed",
  "evidence": "bulk-adopted from continuum unlabeled-open backlog (Joel directive 2026-05-14)",
  "next_action": "triage scope + assign or close stale"
}

Close this issue when the work is done (status=merged/abandoned).

Original issue body

Pre-adoption body

Summary

Full end-to-end fresh install test on both platforms. Nuke everything, follow README, verify it works.

Test plan

Both platforms:

1. Uninstall Docker / Rancher Desktop completely
2. Delete ~/.continuum/
3. Fresh install Docker Desktop
4. git clone && cd continuum && ./setup.sh
5. Verify:
   • Page loads
   • Avatars show for all personas
   • Chat works (send message, get AI response)
   • Personas listed in sidebar with status
   • Tailscale HTTPS works (if configured)

Windows-specific:

• WSL2 install (wsl --install)
• Docker Desktop with WSL2 integration
• setup.sh detects WSL2 correctly

macOS-specific:

• Docker Desktop (not Rancher Desktop — Rancher has port forwarding issues)
• Ports 9003, 9001, 7880 accessible from host

Ship personas

• Qwen3-Omni (audio-native)
• Qwen3.5-4B code-forged (local Candle)
• DeepSeek (cloud fallback with API key)
• Claude Assistant (cloud fallback with API key)

Acceptance criteria

A person with ZERO context clones the repo, runs setup.sh, and has a working system with AI personas they can chat with — within 5 minutes (after initial Docker image pull).

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