[taarraas]

Add map.colors option for per-user/device colors

When several users or devices are shown on the map at once, all location history lines, location points and accuracy circles use the same color, which makes it hard to tell whose track is whose. This adds a map.colors config option that assigns a color per user or per user/device.

Usage

window.owntracks.config = {
  map: {
    colors: {
      alice: "#3b6fd4",
      "bob/phone": "#e06c4f",
    },
  },
};

• Keys are either "user" or "user/device"; a "user/device" entry takes precedence over a "user" entry.
• Applies to location history lines, location points, and the accuracy circle of the last known location.
• Users/devices without an entry fall back to the existing map.polyline, map.circleMarker and map.circle colors (which default to primaryColor), so existing setups look exactly the same.
• Default is {}.

Changes

• src/store/getters.js: filteredLocationHistoryLatLngGroups now returns { user, device, latLngs } objects instead of bare arrays, so each line segment knows which device it belongs to. Map.vue is the only consumer.
• src/views/Map.vue: new deviceColor(user, device, fallback) method, used for the polyline, location point and accuracy circle colors.
• src/config.js: default map.colors: {}.
• src/index.d.ts: colors: Record<string, string> added to the config type.
• docs/config.md: documented map.colors with an example.

The pin marker for the last location is unchanged (it is an icon, not a colored vector layer).

Testing

• npm run lint:js, npm run lint:md, npm run lint:scss, npm test and npm run build all pass.
• Built the Docker image from docker/Dockerfile and ran it against an existing Recorder with two users (iOS and Android devices). With colors set, each user's tracks and accuracy circle render in their own color; without it, the map looks unchanged.
• Two users with colors: { alice: "#3b6fd4", bob: "#e06c4f" }. The screenshot uses synthetic tracks (generated .rec files served by an HTTP-only Recorder) rather than real location data.

I didn't add a CHANGELOG.md entry since entries there are grouped by release; happy to add one if you'd prefer.

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