Fix European trip return heuristic for weekend location tracking

Adjust European short trip heuristic from >3 days to >1 day to correctly
detect when user has returned home from European trips. This fixes the
April 29-30, 2023 case where the location incorrectly showed "Sankt Georg, Hamburg"
instead of "Bristol" when the user was free (no events scheduled) after
the foss-north trip ended on April 27.

The previous logic required more than 3 days to pass before assuming
return home from European countries, but for short European trips by
rail/ferry, users typically return within 1-2 days.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

node_modules/preact/devtools/src/index.d.ts

@@ -0,0 +1,8 @@
+/**
+ * Customize the displayed name of a useState, useReducer or useRef hook
+ * in the devtools panel.
+ *
+ * @param value Wrapped native hook.
+ * @param name Custom name
+ */
+export function addHookName<T>(value: T, name: string): T;