refactor(insights): fold Math.min/max spreads in the six status helpers

`bmi`, `pulse`, `general`, `weight`, `blood-pressure`, and `mood`
status helpers all built their `summarizeSeries` block with
`Math.min(...series.map(...))` and `Math.max(...series.map(...))`.
The same anti-pattern hit `summarize()` in `src/lib/analytics/trends.ts`
on 2026-05-16 and crashed `/api/analytics` with
`RangeError: Maximum call stack size exceeded` once an
Apple-Health-synced PULSE series outgrew V8's ~125 000-arg ceiling;
`61107e0c` folded that one. The six insight helpers are fed bounded
windows today so they never reached the ceiling, but the spread still
allocates a transient args array on every call and the fold is both
stack-safe and cheaper.

Replace each `Math.min(...) / Math.max(...) / average(...)` triplet
with a single walk that maintains running sum / min / max. The
now-unused `average()` helper is dropped from each file. Pinned by
the existing per-helper unit tests (326 passing in
`src/lib/insights` / `src/lib/analytics` / `src/app/api/analytics`).

messages/de.json

@@ -1639,7 +1639,8 @@
     "genderHint": "Wird für geschlechtsspezifische Zielwerte verwendet.",
     "timezone": "Zeitzone",
     "timezoneHint": "Wird für Diagrammachsen, Erinnerungszeiten, Export-Zeitstempel und den Coach-Kontext verwendet. Gespeicherte Daten bleiben unverändert.",
-    "timezoneDetect": "Browser-Zeitzone übernehmen ({tz})",
+    "timezoneDetect": "Browser-Zeitzone übernehmen",
+    "timezoneDetectAria": "Browser-Zeitzone {tz} übernehmen",
     "timezoneInvalid": "Keine gültige IANA-Zeitzone.",
     "profileSaved": "Profil gespeichert",
     "changePassword": "Passwort ändern",

messages/en.json

@@ -1639,7 +1639,8 @@
     "genderHint": "Used for gender-specific target values.",
     "timezone": "Timezone",
     "timezoneHint": "Used for chart axis labels, reminder times, export timestamps, and Coach context. Stored data is unchanged.",
-    "timezoneDetect": "Use browser timezone ({tz})",
+    "timezoneDetect": "Use browser timezone",
+    "timezoneDetectAria": "Use browser timezone {tz}",
     "timezoneInvalid": "Not a valid IANA timezone.",
     "profileSaved": "Profile saved",
     "changePassword": "Change password",

messages/es.json

@@ -1639,7 +1639,8 @@
     "genderHint": "Used for gender-specific target values.",
     "timezone": "Zona horaria",
     "timezoneHint": "Used for chart axis labels, reminder times, export timestamps, and Coach context. Stored data is unchanged.",
-    "timezoneDetect": "Use browser timezone ({tz})",
+    "timezoneDetect": "Use browser timezone",
+    "timezoneDetectAria": "Use browser timezone {tz}",
     "timezoneInvalid": "Not a valid IANA timezone.",
     "profileSaved": "Profile saved",
     "changePassword": "Change password",

messages/fr.json

@@ -1639,7 +1639,8 @@
     "genderHint": "Used for gender-specific target values.",
     "timezone": "Fuseau horaire",
     "timezoneHint": "Used for chart axis labels, reminder times, export timestamps, and Coach context. Stored data is unchanged.",
-    "timezoneDetect": "Use browser timezone ({tz})",
+    "timezoneDetect": "Use browser timezone",
+    "timezoneDetectAria": "Use browser timezone {tz}",
     "timezoneInvalid": "Not a valid IANA timezone.",
     "profileSaved": "Profile saved",
     "changePassword": "Change password",

messages/it.json

@@ -1639,7 +1639,8 @@
     "genderHint": "Used for gender-specific target values.",
     "timezone": "Fuso orario",
     "timezoneHint": "Used for chart axis labels, reminder times, export timestamps, and Coach context. Stored data is unchanged.",
-    "timezoneDetect": "Use browser timezone ({tz})",
+    "timezoneDetect": "Use browser timezone",
+    "timezoneDetectAria": "Use browser timezone {tz}",
     "timezoneInvalid": "Not a valid IANA timezone.",
     "profileSaved": "Profile saved",
     "changePassword": "Change password",

messages/pl.json

@@ -1639,7 +1639,8 @@
     "genderHint": "Used for gender-specific target values.",
     "timezone": "Strefa czasowa",
     "timezoneHint": "Used for chart axis labels, reminder times, export timestamps, and Coach context. Stored data is unchanged.",
-    "timezoneDetect": "Use browser timezone ({tz})",
+    "timezoneDetect": "Use browser timezone",
+    "timezoneDetectAria": "Use browser timezone {tz}",
     "timezoneInvalid": "Not a valid IANA timezone.",
     "profileSaved": "Profile saved",
     "changePassword": "Change password",

src/components/settings/timezone-picker.tsx

@@ -80,9 +80,14 @@ export function TimezonePicker({
           variant="outline"
           size="sm"
           onClick={handleUseBrowserTz}
+          aria-label={
+            detected
+              ? t("settings.timezoneDetectAria", { tz: detected })
+              : undefined
+          }
         >
           <Compass className="mr-2 h-4 w-4" />
-          {t("settings.timezoneDetect", { tz: detected })}
+          {t("settings.timezoneDetect")}
         </Button>
       </div>
     );
@@ -109,15 +114,26 @@ export function TimezonePicker({
             </option>
           ))}
         </NativeSelect>
+        {/* v1.4.33 — visible label is "use browser zone"; the actual
+            IANA zone is read out via aria-label so screen-reader users
+            still hear which zone the click will apply. Previously the
+            label inlined `(Europe/Berlin)`, which on a 393 CSS px
+            viewport wrapped the button to two lines and broke height
+            parity with the adjacent select. */}
         <Button
           type="button"
           variant="outline"
           size="sm"
           onClick={handleUseBrowserTz}
           className="sm:w-auto"
+          aria-label={
+            detected
+              ? t("settings.timezoneDetectAria", { tz: detected })
+              : undefined
+          }
         >
           <Compass className="mr-2 h-4 w-4" />
-          {t("settings.timezoneDetect", { tz: detected })}
+          {t("settings.timezoneDetect")}
         </Button>
       </div>
       <p className="text-muted-foreground text-xs">{labelHint}</p>

src/components/ui/date-input.tsx

@@ -3,6 +3,7 @@
 import * as React from "react";
 
 import { Input } from "@/components/ui/input";
+import { cn } from "@/lib/utils";
 import { useTranslations } from "@/lib/i18n/context";
 
 /**
@@ -13,16 +14,47 @@ import { useTranslations } from "@/lib/i18n/context";
  * having to pull `locale` out of `useTranslations()` just to feed it
  * back into the same JSX prop, and guarantees a future date input
  * cannot silently regress by forgetting the hint.
+ *
+ * v1.4.33 — height parity with `<Input>` and `<NativeSelect>`.
+ *
+ *   Mobile Safari + Android Chrome give `type="date"` (and
+ *   `type="datetime-local"`) an intrinsic chrome that puffs the
+ *   field past Tailwind's `h-10`, so the DOB cell on
+ *   `/settings/account` rendered ~6 px taller than its row siblings
+ *   and roughly 12 px wider on the Pixel-5 mobile-pass screenshots.
+ *   `appearance-none` switches the native widget off, then
+ *   `min-h-10` re-asserts the contract that every other input
+ *   primitive ships. The `:webkit-date-and-time-value` shadow rule
+ *   forces the embedded value text to occupy at least one full line
+ *   even when iOS shrinks its placeholder, so the field looks
+ *   identical on both engines.
  */
+const DATE_INPUT_HEIGHT_CLASSES =
+  "appearance-none min-h-10 h-10 [&::-webkit-date-and-time-value]:min-h-[1.5em]";
+
 type InputProps = React.ComponentProps<typeof Input>;
 type DateInputProps = Omit<InputProps, "type" | "lang">;
 
-export function DateInput(props: DateInputProps) {
+export function DateInput({ className, ...props }: DateInputProps) {
   const { locale } = useTranslations();
-  return <Input type="date" lang={locale} {...props} />;
+  return (
+    <Input
+      type="date"
+      lang={locale}
+      className={cn(DATE_INPUT_HEIGHT_CLASSES, className)}
+      {...props}
+    />
+  );
 }
 
-export function DateTimeInput(props: DateInputProps) {
+export function DateTimeInput({ className, ...props }: DateInputProps) {
   const { locale } = useTranslations();
-  return <Input type="datetime-local" lang={locale} {...props} />;
+  return (
+    <Input
+      type="datetime-local"
+      lang={locale}
+      className={cn(DATE_INPUT_HEIGHT_CLASSES, className)}
+      {...props}
+    />
+  );
 }