📦 @goodandready/dsh-lanmode Fix DSH 0

Key features

• Registers tool /mobileqrgenerates a clean SVG QR code with the active LAN URL and session token ( Point your phone camera at the screen to connect immediately.
• Route /dsh-lanmode/manifest.json and meta tags viewport-fit=cover, apple-mobile-web-app-capable, theme-color.
• Built-in lightweight UDP 5353 responder: announces dsh.local across your local network.
• Generates a two-tier certificate structure: dsh-lanmode Local Root CA (10-year validity) $\rightarrow$ Server Certificate (with SAN for dsh.local, LAN IPs, and localhost).
• QR codes are also accessible in the Settings card and on /dsh-lanmode/health.