diff --git a/messages/de.json b/messages/de.json
index 66a787e6a..25fffb059 100644
--- a/messages/de.json
+++ b/messages/de.json
@@ -336,6 +336,7 @@
     "invalidTimestamp": "Bitte einen gültigen Zeitpunkt wählen.",
     "loginRequired": "Bitte anmelden, um Messwerte zu sehen.",
     "allTypes": "Alle Typen",
+    "filterByType": "Nach Typ filtern",
     "measurementCount": "{count} Messwerte",
     "emptyTitle": "Noch keine Messwerte",
     "emptyDescription": "Erfasse Gewicht, Blutdruck, Puls oder andere Werte, um Trends zu erkennen.",
diff --git a/messages/en.json b/messages/en.json
index aa147e399..e0808411f 100644
--- a/messages/en.json
+++ b/messages/en.json
@@ -336,6 +336,7 @@
     "invalidTimestamp": "Please select a valid time.",
     "loginRequired": "Please sign in to view measurements.",
     "allTypes": "All types",
+    "filterByType": "Filter by type",
     "measurementCount": "{count} measurements",
     "emptyTitle": "No measurements yet",
     "emptyDescription": "Log your weight, blood pressure, pulse, or other vitals to start tracking trends.",
diff --git a/src/components/measurements/measurement-form.tsx b/src/components/measurements/measurement-form.tsx
index d4012b943..18fe636d6 100644
--- a/src/components/measurements/measurement-form.tsx
+++ b/src/components/measurements/measurement-form.tsx
@@ -1,6 +1,6 @@
 "use client";
 
-import { useState } from "react";
+import { useId, useState } from "react";
 import { useQueryClient } from "@tanstack/react-query";
 import { Button } from "@/components/ui/button";
 import {
@@ -139,6 +139,13 @@ export function MeasurementForm({
   const [loading, setLoading] = useState(false);
   const [error, setError] = useState<string | null>(null);
 
+  // v1.4.27 MB3 — wire `aria-describedby` on every required field so
+  // screen readers announce the form-level error banner the moment it
+  // surfaces. The banner already carries `role="alert"`, so the
+  // descriptor relationship is purely additive.
+  const errorId = useId();
+  const errorDescriptor = error ? errorId : undefined;
+
   const typeInfo = MEASUREMENT_TYPES.find((t) => t.value === type);
   const isBpMode = type === "BLOOD_PRESSURE";
   const isGlucoseMode = type === "BLOOD_GLUCOSE";
@@ -270,11 +277,16 @@ export function MeasurementForm({
             <Input
               id="sys"
               type="number"
+              inputMode="numeric"
+              enterKeyHint="next"
               step="1"
               value={sysBp}
               onChange={(e) => setSysBp(e.target.value)}
               placeholder="120"
               required
+              aria-required="true"
+              aria-invalid={!!error || undefined}
+              aria-describedby={errorDescriptor}
               min={60}
               max={280}
             />
@@ -284,11 +296,16 @@ export function MeasurementForm({
             <Input
               id="dia"
               type="number"
+              inputMode="numeric"
+              enterKeyHint="next"
               step="1"
               value={diaBp}
               onChange={(e) => setDiaBp(e.target.value)}
               placeholder="80"
               required
+              aria-required="true"
+              aria-invalid={!!error || undefined}
+              aria-describedby={errorDescriptor}
               min={30}
               max={200}
             />
@@ -298,10 +315,14 @@ export function MeasurementForm({
             <Input
               id="puls"
               type="number"
+              inputMode="numeric"
+              enterKeyHint="next"
               step="1"
               value={pulse}
               onChange={(e) => setPulse(e.target.value)}
               placeholder="72"
+              aria-invalid={!!error || undefined}
+              aria-describedby={errorDescriptor}
               min={30}
               max={220}
             />
@@ -321,6 +342,7 @@ export function MeasurementForm({
           <Input
             id="value"
             type="number"
+            enterKeyHint="next"
             step="any"
             value={value}
             onChange={(e) => setValue(e.target.value)}
@@ -330,6 +352,9 @@ export function MeasurementForm({
                 : undefined
             }
             required
+            aria-required="true"
+            aria-invalid={!!error || undefined}
+            aria-describedby={errorDescriptor}
           />
         </div>
       )}
@@ -364,6 +389,9 @@ export function MeasurementForm({
           value={measuredAt}
           onChange={(e) => setMeasuredAt(e.target.value)}
           required
+          aria-required="true"
+          aria-invalid={!!error || undefined}
+          aria-describedby={errorDescriptor}
         />
       </div>
 
@@ -385,11 +413,14 @@ export function MeasurementForm({
           onChange={(e) => setNotes(e.target.value)}
           placeholder={t("measurements.notesPlaceholder")}
           maxLength={MAX_COMMENT_LENGTH}
+          enterKeyHint="done"
+          autoCapitalize="sentences"
         />
       </div>
 
       {error && (
         <div
+          id={errorId}
           role="alert"
           aria-live="assertive"
           className="bg-destructive/10 text-destructive rounded-lg p-3 text-sm"
diff --git a/src/components/measurements/measurement-list.tsx b/src/components/measurements/measurement-list.tsx
index c62a2e0b9..45da4bf66 100644
--- a/src/components/measurements/measurement-list.tsx
+++ b/src/components/measurements/measurement-list.tsx
@@ -58,7 +58,7 @@ import {
   ArrowUpDown,
   MoreHorizontal,
 } from "lucide-react";
-import { useState } from "react";
+import { useId, useState } from "react";
 import { formatDateTime } from "@/lib/format";
 import { useTranslations, useFormatters } from "@/lib/i18n/context";
 import { invalidateKeys, measurementDependentKeys } from "@/lib/query-keys";
@@ -150,6 +150,11 @@ export function MeasurementList({ onEdit, onAddFirst }: MeasurementListProps) {
   const [editNotes, setEditNotes] = useState("");
   const [editError, setEditError] = useState<string | null>(null);
   const [editDeleteDialogOpen, setEditDeleteDialogOpen] = useState(false);
+  // v1.4.27 MB3 — link the edit dialog error banner to the inputs via
+  // `aria-describedby` so screen readers announce the validation
+  // failure when the user submits an invalid value or timestamp.
+  const editErrorId = useId();
+  const editErrorDescriptor = editError ? editErrorId : undefined;
 
   const setTypeFilter = (value: string) => {
     setTypeFilterRaw(value);
@@ -315,7 +320,10 @@ export function MeasurementList({ onEdit, onAddFirst }: MeasurementListProps) {
       <div className="space-y-4">
         <div className="flex items-center justify-between">
           <Select value={typeFilter} onValueChange={setTypeFilter}>
-            <SelectTrigger className="w-48">
+            <SelectTrigger
+              className="w-48"
+              aria-label={t("measurements.filterByType")}
+            >
               <SelectValue placeholder={t("measurements.allTypes")} />
             </SelectTrigger>
             <SelectContent>
@@ -601,10 +609,14 @@ export function MeasurementList({ onEdit, onAddFirst }: MeasurementListProps) {
                 <Input
                   id="edit-value"
                   type="number"
+                  enterKeyHint="next"
                   step="any"
                   value={editValue}
                   onChange={(e) => setEditValue(e.target.value)}
                   required
+                  aria-required="true"
+                  aria-invalid={!!editError || undefined}
+                  aria-describedby={editErrorDescriptor}
                 />
               </div>
 
@@ -617,6 +629,9 @@ export function MeasurementList({ onEdit, onAddFirst }: MeasurementListProps) {
                   value={editMeasuredAt}
                   onChange={(e) => setEditMeasuredAt(e.target.value)}
                   required
+                  aria-required="true"
+                  aria-invalid={!!editError || undefined}
+                  aria-describedby={editErrorDescriptor}
                 />
               </div>
 
@@ -634,11 +649,14 @@ export function MeasurementList({ onEdit, onAddFirst }: MeasurementListProps) {
                   value={editNotes}
                   onChange={(e) => setEditNotes(e.target.value)}
                   maxLength={MAX_COMMENT_LENGTH}
+                  enterKeyHint="done"
+                  autoCapitalize="sentences"
                 />
               </div>
 
               {editError && (
                 <div
+                  id={editErrorId}
                   role="alert"
                   aria-live="assertive"
                   className="bg-destructive/10 text-destructive rounded-lg p-3 text-sm"
diff --git a/src/components/medications/SideEffectsSection.tsx b/src/components/medications/SideEffectsSection.tsx
index 02905f965..2a46af052 100644
--- a/src/components/medications/SideEffectsSection.tsx
+++ b/src/components/medications/SideEffectsSection.tsx
@@ -443,6 +443,9 @@ export function SideEffectsSection({ medicationId }: SideEffectsSectionProps) {
                 placeholder={t("medications.sideEffects.notesPlaceholder")}
                 rows={3}
                 maxLength={NOTES_MAX}
+                enterKeyHint="done"
+                autoCapitalize="sentences"
+                autoComplete="off"
                 className="border-input bg-background text-foreground w-full rounded-md border px-2 py-1.5 text-sm"
               />
               <p className="text-muted-foreground text-right text-[10px]">
diff --git a/src/components/medications/intake-history-list.tsx b/src/components/medications/intake-history-list.tsx
index b237a31bf..0ea338dce 100644
--- a/src/components/medications/intake-history-list.tsx
+++ b/src/components/medications/intake-history-list.tsx
@@ -48,7 +48,7 @@ import {
   SkipForward,
   AlertTriangle,
 } from "lucide-react";
-import { useState, useCallback } from "react";
+import { useId, useState, useCallback } from "react";
 import { formatDateTime } from "@/lib/format";
 import { useTranslations } from "@/lib/i18n/context";
 
@@ -110,6 +110,10 @@ export function IntakeHistoryList({
   const [editSkipped, setEditSkipped] = useState(false);
   const [editError, setEditError] = useState<string | null>(null);
   const [editDeleteDialogOpen, setEditDeleteDialogOpen] = useState(false);
+  // v1.4.27 MB3 — error banners reference the form inputs via
+  // aria-describedby so screen readers announce validation failures.
+  const editErrorId = useId();
+  const editErrorDescriptor = editError ? editErrorId : undefined;
 
   // Create state — controlled via props or internal
   const [internalCreating, setInternalCreating] = useState(false);
@@ -118,6 +122,8 @@ export function IntakeHistoryList({
   const [createTakenAt, setCreateTakenAt] = useState("");
   const [createSkipped, setCreateSkipped] = useState(false);
   const [createError, setCreateError] = useState<string | null>(null);
+  const createErrorId = useId();
+  const createErrorDescriptor = createError ? createErrorId : undefined;
   const setCreatingRaw = onCreateOpenChange ?? setInternalCreating;
   const setCreating = useCallback(
     (open: boolean) => {
@@ -542,6 +548,9 @@ export function IntakeHistoryList({
                   value={editScheduledFor}
                   onChange={(e) => setEditScheduledFor(e.target.value)}
                   required
+                  aria-required="true"
+                  aria-invalid={!!editError || undefined}
+                  aria-describedby={editErrorDescriptor}
                 />
               </div>
 
@@ -554,6 +563,8 @@ export function IntakeHistoryList({
                   value={editTakenAt}
                   onChange={(e) => setEditTakenAt(e.target.value)}
                   disabled={editSkipped}
+                  aria-invalid={!!editError || undefined}
+                  aria-describedby={editErrorDescriptor}
                 />
               </div>
 
@@ -573,6 +584,7 @@ export function IntakeHistoryList({
 
               {editError && (
                 <div
+                  id={editErrorId}
                   role="alert"
                   aria-live="assertive"
                   className="bg-destructive/10 text-destructive rounded-lg p-3 text-sm"
@@ -683,6 +695,9 @@ export function IntakeHistoryList({
                 value={createScheduledFor}
                 onChange={(e) => setCreateScheduledFor(e.target.value)}
                 required
+                aria-required="true"
+                aria-invalid={!!createError || undefined}
+                aria-describedby={createErrorDescriptor}
               />
             </div>
 
@@ -695,6 +710,8 @@ export function IntakeHistoryList({
                 value={createTakenAt}
                 onChange={(e) => setCreateTakenAt(e.target.value)}
                 disabled={createSkipped}
+                aria-invalid={!!createError || undefined}
+                aria-describedby={createErrorDescriptor}
               />
             </div>
 
@@ -714,6 +731,7 @@ export function IntakeHistoryList({
 
             {createError && (
               <div
+                id={createErrorId}
                 role="alert"
                 aria-live="assertive"
                 className="bg-destructive/10 text-destructive rounded-lg p-3 text-sm"
diff --git a/src/components/medications/inventory-section.tsx b/src/components/medications/inventory-section.tsx
index 1f9a13130..ae14f36d8 100644
--- a/src/components/medications/inventory-section.tsx
+++ b/src/components/medications/inventory-section.tsx
@@ -73,6 +73,10 @@ export function InventorySection({
   // panel for parity with the W8e Provenance accordion.
   const panelId = useId();
   const pastPanelId = useId();
+  // v1.4.27 MB3 — link the add-pen error message back to the doses-total
+  // input via aria-describedby so screen readers announce the failure
+  // when the form rejects an out-of-range value.
+  const formErrorId = useId();
   const [dosesTotal, setDosesTotal] = useState<string>(
     defaultDosesPerUnit ? String(defaultDosesPerUnit) : "",
   );
@@ -438,12 +442,16 @@ export function InventorySection({
                 id="inv-doses-total"
                 type="number"
                 inputMode="numeric"
+                enterKeyHint="next"
                 min={1}
                 max={100}
                 step={1}
                 value={dosesTotal}
                 onChange={(e) => setDosesTotal(e.target.value)}
                 required
+                aria-required="true"
+                aria-invalid={!!formError || undefined}
+                aria-describedby={formError ? formErrorId : undefined}
               />
               <p className="text-muted-foreground text-xs">
                 {t("medications.inventory.fieldDosesTotalHelp")}
@@ -457,6 +465,7 @@ export function InventorySection({
               <Input
                 id="inv-printed-expiry"
                 type="date"
+                enterKeyHint="next"
                 value={printedExpiry}
                 onChange={(e) => setPrintedExpiry(e.target.value)}
               />
@@ -469,6 +478,7 @@ export function InventorySection({
               <Input
                 id="inv-purchased-at"
                 type="date"
+                enterKeyHint="next"
                 value={purchasedAt}
                 onChange={(e) => setPurchasedAt(e.target.value)}
               />
@@ -484,12 +494,21 @@ export function InventorySection({
                 onChange={(e) => setNotes(e.target.value)}
                 maxLength={200}
                 rows={2}
+                enterKeyHint="done"
+                autoCapitalize="sentences"
                 className="border-input bg-background ring-offset-background placeholder:text-muted-foreground focus-visible:ring-ring flex w-full rounded-md border px-3 py-2 text-sm focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-offset-2 disabled:cursor-not-allowed disabled:opacity-50"
               />
             </div>
 
             {formError && (
-              <p className="text-destructive text-sm">{formError}</p>
+              <p
+                id={formErrorId}
+                role="alert"
+                aria-live="polite"
+                className="text-destructive text-sm"
+              >
+                {formError}
+              </p>
             )}
 
             <div className="flex flex-col-reverse gap-2 sm:flex-row sm:justify-end">
diff --git a/src/components/medications/medication-form.tsx b/src/components/medications/medication-form.tsx
index 6d299a4fa..dda262861 100644
--- a/src/components/medications/medication-form.tsx
+++ b/src/components/medications/medication-form.tsx
@@ -1,6 +1,6 @@
 "use client";
 
-import { useState } from "react";
+import { useId, useState } from "react";
 import { useQueryClient } from "@tanstack/react-query";
 import { Button } from "@/components/ui/button";
 import { Input } from "@/components/ui/input";
@@ -304,6 +304,12 @@ export function MedicationForm({
   const [purgeDialogOpen, setPurgeDialogOpen] = useState(false);
   const [phaseConfigOpen, setPhaseConfigOpen] = useState(false);
 
+  // v1.4.27 MB3 — link the form-level error banner to every required
+  // input via `aria-describedby` so screen readers announce the
+  // validation failure on save.
+  const errorId = useId();
+  const errorDescriptor = error ? errorId : undefined;
+
   const isEdit = !!initial;
   const dose = doseAmount
     ? `${doseAmount}${doseUnit ? ` ${doseUnit}` : ""}`
@@ -527,6 +533,12 @@ export function MedicationForm({
           placeholder={t("medications.namePlaceholder")}
           required
           maxLength={100}
+          enterKeyHint="next"
+          autoCapitalize="words"
+          autoComplete="off"
+          aria-required="true"
+          aria-invalid={!!error || undefined}
+          aria-describedby={errorDescriptor}
         />
       </div>
 
@@ -613,6 +625,11 @@ export function MedicationForm({
             placeholder={t("medications.dosePlaceholder")}
             required
             maxLength={20}
+            enterKeyHint="next"
+            autoComplete="off"
+            aria-required="true"
+            aria-invalid={!!error || undefined}
+            aria-describedby={errorDescriptor}
           />
         </div>
         <div className="space-y-1.5">
@@ -625,6 +642,8 @@ export function MedicationForm({
             placeholder="mg"
             maxLength={30}
             className="w-full"
+            enterKeyHint="next"
+            autoComplete="off"
           />
         </div>
       </div>
@@ -690,11 +709,14 @@ export function MedicationForm({
               id="med-doses-per-unit"
               type="number"
               inputMode="numeric"
+              enterKeyHint="next"
               min={1}
               max={100}
               value={dosesPerUnit}
               onChange={(e) => setDosesPerUnit(e.target.value)}
               placeholder={t("medications.glp1DosesPerUnitPlaceholder")}
+              aria-invalid={!!error || undefined}
+              aria-describedby={errorDescriptor}
             />
             <p className="text-muted-foreground text-xs leading-4">
               {t("medications.glp1DosesPerUnitHelp")}
@@ -773,16 +795,23 @@ export function MedicationForm({
                   {t("medications.scheduleFrom")}
                 </Label>
                 <Input
-                  type="text"
-                  inputMode="numeric"
-                  pattern="[0-2][0-9]:[0-5][0-9]"
+                  type="time"
+                  enterKeyHint="next"
                   placeholder="08:00"
                   value={s.windowStart}
-                  className="h-11 text-xs md:text-xs"
+                  // v1.4.27 MB3 — `text-base` on mobile keeps the
+                  // schedule time inputs at 16 px, the iOS Safari floor
+                  // below which the focus-zoom auto-fires. Desktop
+                  // stays compact at `text-xs` because the surrounding
+                  // grid carries the small dense rhythm.
+                  className="h-11 text-base md:text-xs"
                   onChange={(e) =>
                     updateSchedule(i, "windowStart", e.target.value)
                   }
                   required
+                  aria-required="true"
+                  aria-invalid={!!error || undefined}
+                  aria-describedby={errorDescriptor}
                   maxLength={5}
                 />
               </div>
@@ -791,16 +820,18 @@ export function MedicationForm({
                   {t("medications.scheduleTo")}
                 </Label>
                 <Input
-                  type="text"
-                  inputMode="numeric"
-                  pattern="[0-2][0-9]:[0-5][0-9]"
+                  type="time"
+                  enterKeyHint="next"
                   placeholder="09:00"
                   value={s.windowEnd}
-                  className="h-11 text-xs md:text-xs"
+                  className="h-11 text-base md:text-xs"
                   onChange={(e) =>
                     updateSchedule(i, "windowEnd", e.target.value)
                   }
                   required
+                  aria-required="true"
+                  aria-invalid={!!error || undefined}
+                  aria-describedby={errorDescriptor}
                   maxLength={5}
                 />
               </div>
@@ -810,10 +841,13 @@ export function MedicationForm({
                 </Label>
                 <Input
                   value={s.label}
-                  className="h-11 text-xs md:text-xs"
+                  className="h-11 text-base md:text-xs"
                   onChange={(e) => updateSchedule(i, "label", e.target.value)}
                   placeholder={t("medications.labelPlaceholder")}
                   maxLength={50}
+                  enterKeyHint="next"
+                  autoCapitalize="sentences"
+                  autoComplete="off"
                 />
               </div>
               <div className="space-y-2">
@@ -822,10 +856,12 @@ export function MedicationForm({
                 </Label>
                 <Input
                   value={s.dose}
-                  className="h-11 text-xs md:text-xs"
+                  className="h-11 text-base md:text-xs"
                   onChange={(e) => updateSchedule(i, "dose", e.target.value)}
                   placeholder={dose || t("medications.defaultDose")}
                   maxLength={50}
+                  enterKeyHint="done"
+                  autoComplete="off"
                 />
               </div>
             </div>
@@ -910,6 +946,7 @@ export function MedicationForm({
 
       {error && (
         <div
+          id={errorId}
           role="alert"
           aria-live="assertive"
           className="bg-destructive/10 text-destructive rounded-lg p-3 text-sm"
diff --git a/src/components/mood/mood-form.tsx b/src/components/mood/mood-form.tsx
index 958f6b642..1ee44a744 100644
--- a/src/components/mood/mood-form.tsx
+++ b/src/components/mood/mood-form.tsx
@@ -1,6 +1,6 @@
 "use client";
 
-import { useState } from "react";
+import { useId, useState } from "react";
 import { useQueryClient } from "@tanstack/react-query";
 import { Button } from "@/components/ui/button";
 import {
@@ -65,6 +65,10 @@ export function MoodForm({ onSuccess, onCancel }: MoodFormProps) {
   const [loading, setLoading] = useState(false);
   const [error, setError] = useState<string | null>(null);
 
+  // v1.4.27 MB3 — error banner descriptor for the timestamp input.
+  const errorId = useId();
+  const errorDescriptor = error ? errorId : undefined;
+
   function resetForm() {
     setMood("");
     setTagsInput("");
@@ -156,6 +160,9 @@ export function MoodForm({ onSuccess, onCancel }: MoodFormProps) {
           value={moodLoggedAt}
           onChange={(e) => setMoodLoggedAt(e.target.value)}
           required
+          aria-required="true"
+          aria-invalid={!!error || undefined}
+          aria-describedby={errorDescriptor}
         />
       </div>
 
@@ -176,6 +183,9 @@ export function MoodForm({ onSuccess, onCancel }: MoodFormProps) {
           value={tagsInput}
           onChange={(e) => setTagsInput(e.target.value)}
           placeholder={t("mood.tagsPlaceholder")}
+          enterKeyHint="done"
+          autoCapitalize="none"
+          autoComplete="off"
         />
         {/* v1.4.25 W4d — GLP-1 side-effect quick-tags. Tapping a chip
             appends the localised label to the free-text tag list.
@@ -228,6 +238,7 @@ export function MoodForm({ onSuccess, onCancel }: MoodFormProps) {
 
       {error && (
         <div
+          id={errorId}
           role="alert"
           aria-live="assertive"
           className="bg-destructive/10 text-destructive rounded-lg p-3 text-sm"