track info pane, per-type colors, yearly stats

src/lib/activity-colors.ts

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+// Categorical palette slots (validated for light and dark surfaces).
+// Activity types map to fixed slots so a type keeps its color everywhere.
+
+export const CAT_SLOTS = [
+	{ light: '#2a78d6', dark: '#3987e5' }, // blue
+	{ light: '#eb6834', dark: '#d95926' }, // orange
+	{ light: '#1baf7a', dark: '#199e70' }, // aqua
+	{ light: '#eda100', dark: '#c98500' }, // yellow
+	{ light: '#e87ba4', dark: '#d55181' }, // magenta
+	{ light: '#008300', dark: '#008300' }, // green
+	{ light: '#4a3aa7', dark: '#9085e9' }, // violet
+	{ light: '#e34948', dark: '#e66767' } // red
+];
+
+const TYPE_SLOT: Record<string, number> = {
+	hiking: 0,
+	hike: 0,
+	walk: 0,
+	walking: 0,
+	run: 1,
+	running: 1,
+	'trail run': 1,
+	ride: 2,
+	cycling: 2,
+	bike: 2,
+	biking: 2,
+	'virtual ride': 2,
+	'mountain bike': 2,
+	climb: 3,
+	climbing: 3,
+	'via ferrata': 3,
+	alpinism: 3,
+	ski: 6,
+	'backcountry ski': 6,
+	'nordic ski': 6,
+	snowboard: 6,
+	snowshoe: 6
+};
+
+function hash(s: string): number {
+	let h = 0;
+	for (let i = 0; i < s.length; i++) h = (h * 31 + s.charCodeAt(i)) | 0;
+	return Math.abs(h);
+}
+
+export function typeSlot(type: string): number {
+	const t = type.toLowerCase().trim();
+	return TYPE_SLOT[t] ?? hash(t) % CAT_SLOTS.length;
+}
+
+export function typeColor(type: string): { light: string; dark: string } {
+	return CAT_SLOTS[typeSlot(type)];
+}