Thermal printing, offline reliability fixes, and a feedback button

Shipped

• Experimental thermal printing. Direct-to-printer label printing over Bluetooth for the Phomemo M110, right from the browser — no sheet, no driver install. It's marked experimental for a reason: still tuning roll sizes, print density, and reconnect behavior. See Labels & printing for how it fits alongside the existing Avery sheet templates.
• Offline reliability fixes. A cold start while offline now shows your already-cached items instead of a blank screen, and reconnecting after a dropped connection self-heals — auth, network status, and any queued captures all recover on their own instead of needing a manual refresh. Covered conceptually in Pure offline mode & online mode.
• An in-app feedback button. There's now a quick way to send feedback — a bug, an idea, a question — straight from the app, without leaving it or finding an email address. It works offline too: a note sent with no connection queues locally and sends the next time you're back online. I read every one that comes in.