Combusto 1.5.0: dark mode, and a map that finally centers on your stations

Combusto 1.5.0 brings a dark mode, wider FAQ/H1 coverage, and a more reliable map.

What's new

• Dark mode, with a toggle in the header and your choice remembered in the browser — handy if you're checking prices while driving at night and a bright white screen is the last thing you want. If you haven't chosen one, it follows your system's preference instead.
• Province, community, brand and home pages now have a visible FAQ (with FAQPage markup) and an H1 that names the fuel, not just the place — matching what town pages already had.
• A re-center button on both maps (the town page, and "stations near you" on the home page): if you pan or zoom and lose track of the stations, one tap brings them all back into view.

Fixes

• The town page's map used to stay centered on the town's midpoint at a fixed zoom level, so in larger or spread-out towns some stations could fall outside the initial view. It now fits the view to every station with a reliable position automatically.
• Both maps now dim for dark mode too, with a CSS filter over the regular OpenStreetMap tiles — no new map provider and no API key needed.