feat: add timezone configuration in app settings

apps/desktop/src/components/main/sidebar/search/item.tsx

@@ -6,6 +6,7 @@ import { cn } from "@hypr/utils";
 import { type SearchResult } from "../../../../contexts/search/ui";
 import * as main from "../../../../store/tinybase/store/main";
 import { type TabInput, useTabs } from "../../../../store/zustand/tabs";
+import { useTimezone } from "../../../../utils/timezone";
 import { getInitials } from "../../body/contacts/shared";
 
 export function SearchResultItem({ result }: { result: SearchResult }) {
@@ -141,6 +142,8 @@ function SessionSearchResultItem({
   result: SearchResult;
   onClick: () => void;
 }) {
+  const timezone = useTimezone();
+
   const displayTitle = useMemo(() => {
     const sanitized = DOMPurify.sanitize(result.titleHighlighted, {
       ALLOWED_TAGS: ["mark"],
@@ -198,7 +201,10 @@ function SessionSearchResultItem({
   } else if (diffDays === 1) {
     timeAgo = "Yesterday";
   } else if (diffDays < 7) {
-    timeAgo = createdAt.toLocaleDateString("en-US", { weekday: "long" });
+    timeAgo = createdAt.toLocaleDateString("en-US", {
+      weekday: "long",
+      timeZone: timezone,
+    });
   } else if (diffDays < 30) {
     const weeks = Math.floor(diffDays / 7);
     timeAgo = weeks === 1 ? "a week ago" : `${weeks} weeks ago`;

apps/desktop/src/components/main/sidebar/timeline/item.tsx

@@ -23,6 +23,7 @@ import {
   type TimelineItem,
   TimelinePrecision,
 } from "../../../../utils/timeline";
+import { useTimezone } from "../../../../utils/timezone";
 import { InteractiveButton } from "../../../interactive-button";
 
 export const TimelineItemComponent = memo(
@@ -109,6 +110,7 @@ const EventItem = memo(
     const openCurrent = useTabs((state) => state.openCurrent);
     const openNew = useTabs((state) => state.openNew);
     const invalidateResource = useTabs((state) => state.invalidateResource);
+    const timezone = useTimezone();
 
     const eventId = item.id;
 
@@ -155,8 +157,8 @@ const EventItem = memo(
     const calendarId = item.data.calendar_id ?? null;
     const recurrenceSeriesId = item.data.recurrence_series_id;
     const displayTime = useMemo(
-      () => formatDisplayTime(item.data.started_at, precision),
-      [item.data.started_at, precision],
+      () => formatDisplayTime(item.data.started_at, precision, timezone),
+      [item.data.started_at, precision, timezone],
     );
 
     const openEvent = useCallback(
@@ -306,6 +308,7 @@ const SessionItem = memo(
     const openCurrent = useTabs((state) => state.openCurrent);
     const openNew = useTabs((state) => state.openNew);
     const invalidateResource = useTabs((state) => state.invalidateResource);
+    const timezone = useTimezone();
 
     const sessionId = item.id;
     const title =
@@ -336,8 +339,12 @@ const SessionItem = memo(
 
     const displayTime = useMemo(
       () =>
-        formatDisplayTime(eventStartedAt ?? item.data.created_at, precision),
-      [eventStartedAt, item.data.created_at, precision],
+        formatDisplayTime(
+          eventStartedAt ?? item.data.created_at,
+          precision,
+          timezone,
+        ),
+      [eventStartedAt, item.data.created_at, precision, timezone],
     );
 
     const handleClick = useCallback(() => {
@@ -399,6 +406,7 @@ const SessionItem = memo(
 function formatDisplayTime(
   timestamp: string | null | undefined,
   precision: TimelinePrecision,
+  timezone: string,
 ): string {
   const date = safeParseDate(timestamp);
   if (!date) {
@@ -408,6 +416,7 @@ function formatDisplayTime(
   const time = date.toLocaleTimeString([], {
     hour: "numeric",
     minute: "numeric",
+    timeZone: timezone,
   });
 
   if (precision === "time") {
@@ -416,11 +425,16 @@ function formatDisplayTime(
 
   const sameYear = date.getFullYear() === new Date().getFullYear();
   const dateStr = sameYear
-    ? date.toLocaleDateString([], { month: "short", day: "numeric" })
+    ? date.toLocaleDateString([], {
+        month: "short",
+        day: "numeric",
+        timeZone: timezone,
+      })
     : date.toLocaleDateString([], {
         month: "short",
         day: "numeric",
         year: "numeric",
+        timeZone: timezone,
       });
 
   return `${dateStr}, ${time}`;

apps/desktop/src/components/settings/general/index.tsx

@@ -17,6 +17,7 @@ import { NotificationSettingsView } from "./notification";
 import { Permissions } from "./permissions";
 import { SpokenLanguagesView } from "./spoken-languages";
 import { StorageSettingsView } from "./storage";
+import { TimezoneView } from "./timezone";
 
 function useSettingsForm() {
   const value = useConfigValues([
@@ -27,6 +28,7 @@ function useSettingsForm() {
     "ai_language",
     "spoken_languages",
     "current_stt_provider",
+    "timezone",
   ] as const);
 
   const setPartialValues = settings.UI.useSetPartialValuesCallback(
@@ -55,6 +57,7 @@ function useSettingsForm() {
       telemetry_consent: value.telemetry_consent,
       ai_language: value.ai_language,
       spoken_languages: value.spoken_languages,
+      timezone: value.timezone,
     },
     listeners: {
       onChange: ({ formApi }) => {
@@ -195,7 +198,7 @@ export function SettingsApp() {
 
       <div>
         <h2 className="text-lg font-semibold font-serif mb-4">
-          Language & Vocabulary
+          Language & Region
         </h2>
         <div className="flex flex-col gap-6">
           <form.Field name="ai_language">
@@ -222,6 +225,14 @@ export function SettingsApp() {
               </>
             )}
           </form.Field>
+          <form.Field name="timezone">
+            {(field) => (
+              <TimezoneView
+                value={field.state.value}
+                onChange={(val) => field.handleChange(val)}
+              />
+            )}
+          </form.Field>
         </div>
       </div>
 

apps/desktop/src/components/settings/general/timezone.tsx

@@ -0,0 +1,92 @@
+import { useMemo } from "react";
+
+import {
+  Select,
+  SelectContent,
+  SelectItem,
+  SelectTrigger,
+  SelectValue,
+} from "@hypr/ui/components/ui/select";
+
+const COMMON_TIMEZONES = [
+  { value: "Pacific/Honolulu", label: "Hawaii (HST)" },
+  { value: "America/Anchorage", label: "Alaska (AKST)" },
+  { value: "America/Los_Angeles", label: "Pacific Time (PST)" },
+  { value: "America/Denver", label: "Mountain Time (MST)" },
+  { value: "America/Chicago", label: "Central Time (CST)" },
+  { value: "America/New_York", label: "Eastern Time (EST)" },
+  { value: "America/Sao_Paulo", label: "Brasilia (BRT)" },
+  { value: "Atlantic/Reykjavik", label: "Iceland (GMT)" },
+  { value: "Europe/London", label: "London (GMT/BST)" },
+  { value: "Europe/Paris", label: "Paris (CET)" },
+  { value: "Europe/Berlin", label: "Berlin (CET)" },
+  { value: "Europe/Moscow", label: "Moscow (MSK)" },
+  { value: "Asia/Dubai", label: "Dubai (GST)" },
+  { value: "Asia/Kolkata", label: "India (IST)" },
+  { value: "Asia/Bangkok", label: "Bangkok (ICT)" },
+  { value: "Asia/Singapore", label: "Singapore (SGT)" },
+  { value: "Asia/Shanghai", label: "China (CST)" },
+  { value: "Asia/Tokyo", label: "Tokyo (JST)" },
+  { value: "Asia/Seoul", label: "Seoul (KST)" },
+  { value: "Australia/Sydney", label: "Sydney (AEST)" },
+  { value: "Pacific/Auckland", label: "Auckland (NZST)" },
+];
+
+const SYSTEM_TIMEZONE_VALUE = "system";
+
+function getSystemTimezone(): string {
+  try {
+    return Intl.DateTimeFormat().resolvedOptions().timeZone;
+  } catch {
+    return "UTC";
+  }
+}
+
+export function TimezoneView({
+  value,
+  onChange,
+}: {
+  value: string | undefined;
+  onChange: (value: string | undefined) => void;
+}) {
+  const systemTimezone = useMemo(() => getSystemTimezone(), []);
+
+  const displayValue = value ?? SYSTEM_TIMEZONE_VALUE;
+
+  const handleChange = (newValue: string) => {
+    if (newValue === SYSTEM_TIMEZONE_VALUE) {
+      onChange(undefined);
+    } else {
+      onChange(newValue);
+    }
+  };
+
+  const systemLabel = useMemo(() => {
+    const tz = COMMON_TIMEZONES.find((t) => t.value === systemTimezone);
+    return tz ? `System (${tz.label})` : `System (${systemTimezone})`;
+  }, [systemTimezone]);
+
+  return (
+    <div className="flex flex-row items-center justify-between">
+      <div>
+        <h3 className="text-sm font-medium mb-1">Timezone</h3>
+        <p className="text-xs text-neutral-600">
+          Timezone for displaying dates and times
+        </p>
+      </div>
+      <Select value={displayValue} onValueChange={handleChange}>
+        <SelectTrigger className="w-52 shadow-none focus:ring-0 focus:ring-offset-0">
+          <SelectValue />
+        </SelectTrigger>
+        <SelectContent className="max-h-[300px] overflow-auto">
+          <SelectItem value={SYSTEM_TIMEZONE_VALUE}>{systemLabel}</SelectItem>
+          {COMMON_TIMEZONES.map((tz) => (
+            <SelectItem key={tz.value} value={tz.value}>
+              {tz.label}
+            </SelectItem>
+          ))}
+        </SelectContent>
+      </Select>
+    </div>
+  );
+}

apps/desktop/src/config/registry.ts

@@ -19,7 +19,8 @@ export type ConfigKey =
   | "save_recordings"
   | "telemetry_consent"
   | "current_llm_provider"
-  | "current_llm_model";
+  | "current_llm_model"
+  | "timezone";
 
 type ConfigValueType<K extends ConfigKey> =
   (typeof CONFIG_REGISTRY)[K]["default"];
@@ -139,4 +140,9 @@ export const CONFIG_REGISTRY = {
     key: "current_llm_model",
     default: undefined,
   },
+
+  timezone: {
+    key: "timezone",
+    default: undefined,
+  },
 } satisfies Record<ConfigKey, ConfigDefinition>;

apps/desktop/src/utils/timezone.ts

@@ -0,0 +1,49 @@
+import { useConfigValue } from "../config/use-config";
+
+export function getSystemTimezone(): string {
+  try {
+    return Intl.DateTimeFormat().resolvedOptions().timeZone;
+  } catch {
+    return "UTC";
+  }
+}
+
+export function useTimezone(): string {
+  const configuredTimezone = useConfigValue("timezone");
+  return configuredTimezone ?? getSystemTimezone();
+}
+
+export function formatTimeWithTimezone(
+  date: Date,
+  timezone: string,
+  options?: Intl.DateTimeFormatOptions,
+): string {
+  const defaultOptions: Intl.DateTimeFormatOptions = {
+    hour: "numeric",
+    minute: "numeric",
+    timeZone: timezone,
+  };
+  return date.toLocaleTimeString([], { ...defaultOptions, ...options });
+}
+
+export function formatDateWithTimezone(
+  date: Date,
+  timezone: string,
+  options?: Intl.DateTimeFormatOptions,
+): string {
+  const defaultOptions: Intl.DateTimeFormatOptions = {
+    timeZone: timezone,
+  };
+  return date.toLocaleDateString([], { ...defaultOptions, ...options });
+}
+
+export function formatDateTimeWithTimezone(
+  date: Date,
+  timezone: string,
+  options?: Intl.DateTimeFormatOptions,
+): string {
+  const defaultOptions: Intl.DateTimeFormatOptions = {
+    timeZone: timezone,
+  };
+  return date.toLocaleString([], { ...defaultOptions, ...options });
+}

packages/store/src/zod.ts

@@ -199,6 +199,7 @@ export const generalSchema = z.object({
   current_llm_model: z.string().optional(),
   current_stt_provider: z.string().optional(),
   current_stt_model: z.string().optional(),
+  timezone: z.string().optional(),
 });
 
 export const aiProviderSchema = z