Adds Web App Manifest, a minimal Service Worker, and Apple/Android meta
tags so the app can be added to a phone home screen and opens full-screen
in standalone mode (no browser chrome).
- static/manifest.json: name, short_name, display=standalone, icons
- static/sw.js: minimal SW served at /sw.js (root scope) via new Flask route
- static/icon-192.png, icon-512.png: generated by sbin/gen_icons.py (stdlib only)
- base.html: manifest link, theme-color, apple-mobile-web-app-* tags, SW registration
- Dark mode via prefers-color-scheme: pure CSS, no JS, follows OS setting
- CSS custom properties for all colors; dark palette redefines variables
- Nav: brand is now a home link, Dashboard link removed, nowrap keeps
it single-line on mobile; compact padding at 640px breakpoint
- Battery health % uses CSS classes (health-good/warn/bad) instead of
inline Jinja colors — readable in both light and dark modes
- Stat card counts use CSS color variables for dark mode support
- Fix duplicate display:none on bulk toolbar
- input[type=date] added to themed input selector
- Device model: add device_type column (String 50, nullable)
- Device add/edit: type select with presets + custom entry
- Device detail: show type in info card; new Edit Device form
- Device list: Type column + client-side filter bar (type + text search)
- Mobile: card-style responsive tables on dashboard and device list,
form-grid-2col collapse, larger tap targets, stacked form-actions,
column picker viewport fix, filter bar full-width controls
- Assign page: larger radio touch targets (min-height 44px)
- 3 new acceptance tests for device_type (45 total)
iterminate