A local plugin manager for DeepSeek Harness

Key features

• A local plugin manager for DeepSeek Harness: a "Plugin manager" tab under Settings → Plugins with collapsible necessity groups, origin classification (built-in vs user-installed), status/version/source columns and enable/disable toggles
• multi-source parallel update checks with rate-limit circuit breaker
• a plugin market over the awesome-dsh-plugin catalog
• and a standalone brick-rescue toolchain (v0.7+): rescue-daemon (port 3081, works when the engine is down), open-boot (browser-triggered self-check/repair/start), and dsh-boot (Steam-style boot sequence with exit codes).
• Cross-platform, zero new runtime dependencies.