Initial commit: Paperwall, a standalone e-ink dashboard

Navidrome now-playing, clock, and weather for a Waveshare epd4in0e panel,
with a local web UI and install/uninstall scripts for the Pi.

web/templates/settings_weather.html

@@ -0,0 +1,16 @@
+{% extends "base.html" %}
+{% block content %}
+<h1>Weather</h1>
+<p style="font-size:0.85rem;color:#666">Uses Open-Meteo (no API key needed) &mdash; just the coordinates for your location.</p>
+<form method="post">
+  <div class="field">
+    <label for="latitude">Latitude</label>
+    <input type="text" id="latitude" name="latitude" value="{{ settings.latitude if settings.latitude is not none else '' }}" placeholder="e.g. 52.52">
+  </div>
+  <div class="field">
+    <label for="longitude">Longitude</label>
+    <input type="text" id="longitude" name="longitude" value="{{ settings.longitude if settings.longitude is not none else '' }}" placeholder="e.g. 13.40">
+  </div>
+  <button type="submit">Save</button>
+</form>
+{% endblock %}