Fix and enhance navigate to time functionality

• Add i18n support for navigate button and dialog title
• Update ChangeDate component to return DateTime object alongside ISO string
• Fix closest date finding algorithm to handle cases where exact month doesn't exist
• Add navigate to time (g) shortcut to keyboard shortcuts modal

web/src/lib/managers/timeline-manager/internal/search-support.svelte.ts

@@ -143,3 +143,24 @@ export function findMonthGroupForDate(timelineManager: TimelineManager, targetYe
     }
   }
 }
+
+export function findClosestGroupForDate(timelineManager: TimelineManager, targetYearMonth: TimelineYearMonth) {
+  let closestMonth: MonthGroup | undefined;
+  let minDifference = Number.MAX_SAFE_INTEGER;
+
+  for (const month of timelineManager.months) {
+    const { year, month: monthNum } = month.yearMonth;
+
+    // Calculate the absolute difference in months
+    const yearDiff = Math.abs(year - targetYearMonth.year);
+    const monthDiff = Math.abs(monthNum - targetYearMonth.month);
+    const totalDiff = yearDiff * 12 + monthDiff;
+
+    if (totalDiff < minDifference) {
+      minDifference = totalDiff;
+      closestMonth = month;
+    }
+  }
+
+  return closestMonth;
+}

web/src/lib/managers/timeline-manager/timeline-manager.svelte.ts

@@ -16,6 +16,7 @@ import {
   runAssetOperation,
 } from '$lib/managers/timeline-manager/internal/operations-support.svelte';
 import {
+  findClosestGroupForDate,
   findMonthGroupForAsset as findMonthGroupForAssetUtil,
   findMonthGroupForDate,
   getAssetWithOffset,
@@ -523,9 +524,13 @@ export class TimelineManager {
   }
 
   async getClosestAssetToDate(dateTime: TimelineDateTime) {
-    const monthGroup = findMonthGroupForDate(this, dateTime);
+    let monthGroup = findMonthGroupForDate(this, dateTime);
     if (!monthGroup) {
-      return;
+      // if exact match not found, find closest
+      monthGroup = findClosestGroupForDate(this, dateTime);
+      if (!monthGroup) {
+        return;
+      }
     }
     await this.loadMonthGroup(dateTime, { cancelable: false });
     const asset = monthGroup.findClosest(dateTime);