diff --git a/src/components/admin/feedback-inbox-section.tsx b/src/components/admin/feedback-inbox-section.tsx
index 76852cff5..d42fe14ee 100644
--- a/src/components/admin/feedback-inbox-section.tsx
+++ b/src/components/admin/feedback-inbox-section.tsx
@@ -25,13 +25,7 @@ import {
 import { Badge } from "@/components/ui/badge";
 import { Button } from "@/components/ui/button";
 import { EmptyState } from "@/components/ui/empty-state";
-import {
-  Dialog,
-  DialogContent,
-  DialogDescription,
-  DialogHeader,
-  DialogTitle,
-} from "@/components/ui/dialog";
+import { ResponsiveSheet } from "@/components/ui/responsive-sheet";
 import { Label } from "@/components/ui/label";
 import { Tabs, TabsContent, TabsList, TabsTrigger } from "@/components/ui/tabs";
 import { formatDateTime } from "@/lib/format";
@@ -329,38 +323,110 @@ function FeedbackDetailDialog({
     typeof meta.appVersion === "string" ? meta.appVersion : null;
 
   return (
-    <Dialog open={open} onOpenChange={onOpenChange}>
-      <DialogContent className="max-h-[85vh] overflow-y-auto sm:max-w-2xl">
-        <DialogHeader>
-          <DialogTitle className="flex items-center gap-2">
-            <MessageSquare className="h-5 w-5" />
-            {item.subject}
-          </DialogTitle>
-          <DialogDescription>
-            <span className="flex flex-wrap items-center gap-2 text-xs">
-              <FeedbackCategoryBadge category={item.category} />
-              <span>
-                {t("admin.feedback.submittedBy")}:{" "}
-                {item.user?.username ?? t("admin.feedback.anonymous")}
-              </span>
-              <span>·</span>
-              <span>{formatDateTime(item.createdAt)}</span>
-              {issueUrl && (
-                <a
-                  href={issueUrl}
-                  target="_blank"
-                  rel="noopener noreferrer"
-                  className="text-primary inline-flex items-center gap-1"
+    <ResponsiveSheet
+      open={open}
+      onOpenChange={onOpenChange}
+      title={
+        <span className="flex items-center gap-2">
+          <MessageSquare className="h-5 w-5" />
+          {item.subject}
+        </span>
+      }
+      description={
+        <span className="flex flex-wrap items-center gap-2 text-xs">
+          <FeedbackCategoryBadge category={item.category} />
+          <span>
+            {t("admin.feedback.submittedBy")}:{" "}
+            {item.user?.username ?? t("admin.feedback.anonymous")}
+          </span>
+          <span>·</span>
+          <span>{formatDateTime(item.createdAt)}</span>
+          {issueUrl && (
+            <a
+              href={issueUrl}
+              target="_blank"
+              rel="noopener noreferrer"
+              className="text-primary inline-flex items-center gap-1"
+            >
+              <GitPullRequest className="h-3 w-3" />
+              {t("admin.feedback.viewIssue")}
+              <ExternalLink className="h-3 w-3" />
+            </a>
+          )}
+        </span>
+      }
+      className="sm:max-w-2xl"
+      footer={
+        <div className="flex w-full flex-wrap items-center gap-2">
+          <Button
+            size="sm"
+            variant="outline"
+            disabled={update.isPending || item.status === "ACKNOWLEDGED"}
+            onClick={() => update.mutate({ status: "ACKNOWLEDGED" })}
+          >
+            <CheckCircle2 className="mr-1.5 h-3.5 w-3.5" />
+            {t("admin.feedback.actionAcknowledge")}
+          </Button>
+          <Button
+            size="sm"
+            disabled={update.isPending || item.status === "RESOLVED"}
+            onClick={() => update.mutate({ status: "RESOLVED" })}
+          >
+            <CheckCircle2 className="mr-1.5 h-3.5 w-3.5" />
+            {t("admin.feedback.actionResolve")}
+          </Button>
+          <AlertDialog>
+            <AlertDialogTrigger asChild>
+              <Button
+                size="sm"
+                variant="destructive"
+                disabled={archive.isPending || item.status === "ARCHIVED"}
+              >
+                <Trash2 className="mr-1.5 h-3.5 w-3.5" />
+                {t("admin.feedback.actionArchive")}
+              </Button>
+            </AlertDialogTrigger>
+            <AlertDialogContent>
+              <AlertDialogHeader>
+                <AlertDialogTitle>
+                  {t("admin.feedback.archiveConfirm")}
+                </AlertDialogTitle>
+              </AlertDialogHeader>
+              <AlertDialogFooter>
+                <AlertDialogCancel>{t("common.cancel")}</AlertDialogCancel>
+                <AlertDialogAction
+                  onClick={() => archive.mutate()}
+                  className="bg-destructive text-destructive-foreground hover:bg-destructive/90"
                 >
-                  <GitPullRequest className="h-3 w-3" />
-                  {t("admin.feedback.viewIssue")}
-                  <ExternalLink className="h-3 w-3" />
-                </a>
+                  {t("admin.feedback.actionArchive")}
+                </AlertDialogAction>
+              </AlertDialogFooter>
+            </AlertDialogContent>
+          </AlertDialog>
+          {githubConfigured && !issueUrl && (
+            <Button
+              size="sm"
+              variant="outline"
+              disabled={publish.isPending}
+              onClick={() => publish.mutate()}
+              className="ml-auto"
+            >
+              {publish.isPending ? (
+                <Loader2 className="mr-1.5 h-3.5 w-3.5 animate-spin motion-reduce:animate-none" />
+              ) : (
+                <GitPullRequest className="mr-1.5 h-3.5 w-3.5" />
               )}
-            </span>
-          </DialogDescription>
-        </DialogHeader>
-
+              {t("admin.feedback.actionPublishGithub")}
+            </Button>
+          )}
+          {issueUrl && (
+            <Badge className="border-success/30 bg-success/15 text-success ml-auto">
+              {t("admin.feedback.publishedToGithub")}
+            </Badge>
+          )}
+        </div>
+      }
+    >
         <div className="space-y-4 text-sm">
           <div className="bg-muted/40 rounded-md p-3 whitespace-pre-wrap">
             {item.description}
@@ -450,76 +516,7 @@ function FeedbackDetailDialog({
             </div>
           </div>
 
-          <div className="border-border flex flex-wrap items-center gap-2 border-t pt-3">
-            <Button
-              size="sm"
-              variant="outline"
-              disabled={update.isPending || item.status === "ACKNOWLEDGED"}
-              onClick={() => update.mutate({ status: "ACKNOWLEDGED" })}
-            >
-              <CheckCircle2 className="mr-1.5 h-3.5 w-3.5" />
-              {t("admin.feedback.actionAcknowledge")}
-            </Button>
-            <Button
-              size="sm"
-              disabled={update.isPending || item.status === "RESOLVED"}
-              onClick={() => update.mutate({ status: "RESOLVED" })}
-            >
-              <CheckCircle2 className="mr-1.5 h-3.5 w-3.5" />
-              {t("admin.feedback.actionResolve")}
-            </Button>
-            <AlertDialog>
-              <AlertDialogTrigger asChild>
-                <Button
-                  size="sm"
-                  variant="destructive"
-                  disabled={archive.isPending || item.status === "ARCHIVED"}
-                >
-                  <Trash2 className="mr-1.5 h-3.5 w-3.5" />
-                  {t("admin.feedback.actionArchive")}
-                </Button>
-              </AlertDialogTrigger>
-              <AlertDialogContent>
-                <AlertDialogHeader>
-                  <AlertDialogTitle>
-                    {t("admin.feedback.archiveConfirm")}
-                  </AlertDialogTitle>
-                </AlertDialogHeader>
-                <AlertDialogFooter>
-                  <AlertDialogCancel>{t("common.cancel")}</AlertDialogCancel>
-                  <AlertDialogAction
-                    onClick={() => archive.mutate()}
-                    className="bg-destructive text-destructive-foreground hover:bg-destructive/90"
-                  >
-                    {t("admin.feedback.actionArchive")}
-                  </AlertDialogAction>
-                </AlertDialogFooter>
-              </AlertDialogContent>
-            </AlertDialog>
-            {githubConfigured && !issueUrl && (
-              <Button
-                size="sm"
-                variant="outline"
-                disabled={publish.isPending}
-                onClick={() => publish.mutate()}
-                className="ml-auto"
-              >
-                {publish.isPending ? (
-                  <Loader2 className="mr-1.5 h-3.5 w-3.5 animate-spin motion-reduce:animate-none" />
-                ) : (
-                  <GitPullRequest className="mr-1.5 h-3.5 w-3.5" />
-                )}
-                {t("admin.feedback.actionPublishGithub")}
-              </Button>
-            )}
-            {issueUrl && (
-              <Badge className="border-success/30 bg-success/15 text-success ml-auto">
-                {t("admin.feedback.publishedToGithub")}
-              </Badge>
-            )}
-          </div>
         </div>
-      </DialogContent>
-    </Dialog>
+    </ResponsiveSheet>
   );
 }
diff --git a/src/components/charts/mood-chart.tsx b/src/components/charts/mood-chart.tsx
index 527c134bc..8a17fb6b5 100644
--- a/src/components/charts/mood-chart.tsx
+++ b/src/components/charts/mood-chart.tsx
@@ -738,7 +738,7 @@ export function MoodChart({
                   tickLine={false}
                   axisLine={false}
                   width={65}
-                  tickMargin={6}
+                  tickMargin={10}
                   tickFormatter={formatMoodTick}
                 />
                 <Tooltip
diff --git a/src/components/charts/trend-card.tsx b/src/components/charts/trend-card.tsx
index 127aeaf4f..8756ae486 100644
--- a/src/components/charts/trend-card.tsx
+++ b/src/components/charts/trend-card.tsx
@@ -240,7 +240,7 @@ export function TrendCard({
         className="mt-2 flex min-w-0 items-baseline gap-x-1.5"
         data-slot="trend-card-value-row"
       >
-        <span className="min-w-0 truncate text-3xl leading-none font-bold tracking-tight tabular-nums">
+        <span className="min-w-0 truncate text-3xl leading-none font-semibold tracking-tight tabular-nums">
           {latest !== null ? renderPair(latest, secondary?.latest) : "—"}
         </span>
         <span className="text-muted-foreground shrink-0 text-sm tabular-nums">
diff --git a/src/components/medications/ResearchModeAcknowledgmentDialog.tsx b/src/components/medications/ResearchModeAcknowledgmentDialog.tsx
index e1ad4cca8..659a5cb29 100644
--- a/src/components/medications/ResearchModeAcknowledgmentDialog.tsx
+++ b/src/components/medications/ResearchModeAcknowledgmentDialog.tsx
@@ -42,14 +42,7 @@ import { useMutation, useQueryClient } from "@tanstack/react-query";
 import { toast } from "sonner";
 import { AlertTriangle, BookOpenCheck, Loader2 } from "lucide-react";
 
-import {
-  Dialog,
-  DialogContent,
-  DialogDescription,
-  DialogFooter,
-  DialogHeader,
-  DialogTitle,
-} from "@/components/ui/dialog";
+import { ResponsiveSheet } from "@/components/ui/responsive-sheet";
 import { Button } from "@/components/ui/button";
 import { useTranslations } from "@/lib/i18n/context";
 
@@ -131,27 +124,44 @@ export function ResearchModeAcknowledgmentDialog({
   }
 
   return (
-    <Dialog open={open} onOpenChange={onOpenChange}>
-      <DialogContent
-        data-slot="research-mode-acknowledgment-dialog"
-        className="flex max-h-[90vh] flex-col sm:max-w-xl"
-      >
-        <DialogHeader>
-          <DialogTitle className="flex items-center gap-2">
-            <BookOpenCheck className="text-dracula-purple h-5 w-5 shrink-0" />
-            {t("medications.researchMode.dialog.title")}
-          </DialogTitle>
-          <DialogDescription>
-            {t("medications.researchMode.dialog.intro")}
-          </DialogDescription>
-        </DialogHeader>
-
-        {/* Only the body scrolls; header + footer stay pinned so the
-            Acknowledge / Cancel CTAs are always reachable without
-            scrolling on small viewports (the previous markup scrolled
-            the entire DialogContent, pushing the footer below the
-            fold on iPhone-class heights). */}
-        <div className="-mr-2 flex-1 space-y-4 overflow-y-auto pr-2 text-sm">
+    <ResponsiveSheet
+      open={open}
+      onOpenChange={onOpenChange}
+      title={
+        <span className="flex items-center gap-2">
+          <BookOpenCheck className="text-dracula-purple h-5 w-5 shrink-0" />
+          {t("medications.researchMode.dialog.title")}
+        </span>
+      }
+      description={t("medications.researchMode.dialog.intro")}
+      className="sm:max-w-xl"
+      footer={
+        <div className="flex w-full gap-2 sm:justify-end sm:gap-2">
+          <Button
+            variant="outline"
+            onClick={handleCancel}
+            disabled={mutation.isPending}
+            data-slot="research-mode-cancel"
+          >
+            {t("medications.researchMode.dialog.cancelCta")}
+          </Button>
+          <Button
+            onClick={handleAcknowledge}
+            disabled={mutation.isPending || !currentDisclaimerVersion}
+            data-slot="research-mode-acknowledge"
+          >
+            {mutation.isPending ? (
+              <Loader2 className="mr-2 h-4 w-4 animate-spin motion-reduce:animate-none" />
+            ) : null}
+            {t("medications.researchMode.dialog.acknowledgeCta")}
+          </Button>
+        </div>
+      }
+    >
+        <div
+          data-slot="research-mode-acknowledgment-dialog"
+          className="space-y-4 text-sm"
+        >
           <section
             aria-labelledby="research-mode-what-it-is"
             data-slot="research-mode-what-it-is"
@@ -253,28 +263,6 @@ export function ResearchModeAcknowledgmentDialog({
             </p>
           )}
         </div>
-
-        <DialogFooter className="gap-2 sm:gap-2">
-          <Button
-            variant="outline"
-            onClick={handleCancel}
-            disabled={mutation.isPending}
-            data-slot="research-mode-cancel"
-          >
-            {t("medications.researchMode.dialog.cancelCta")}
-          </Button>
-          <Button
-            onClick={handleAcknowledge}
-            disabled={mutation.isPending || !currentDisclaimerVersion}
-            data-slot="research-mode-acknowledge"
-          >
-            {mutation.isPending ? (
-              <Loader2 className="mr-2 h-4 w-4 animate-spin motion-reduce:animate-none" />
-            ) : null}
-            {t("medications.researchMode.dialog.acknowledgeCta")}
-          </Button>
-        </DialogFooter>
-      </DialogContent>
-    </Dialog>
+    </ResponsiveSheet>
   );
 }
diff --git a/src/components/medications/__tests__/ResearchModeAcknowledgmentDialog.test.tsx b/src/components/medications/__tests__/ResearchModeAcknowledgmentDialog.test.tsx
index 95a447375..eaaa9440d 100644
--- a/src/components/medications/__tests__/ResearchModeAcknowledgmentDialog.test.tsx
+++ b/src/components/medications/__tests__/ResearchModeAcknowledgmentDialog.test.tsx
@@ -60,37 +60,38 @@ vi.mock("sonner", () => ({
   },
 }));
 
-// Radix Dialog uses Portals which `renderToStaticMarkup` does not
-// realise. We collapse the primitives to plain wrappers so the body of
-// the dialog is reachable in the static markup.
-vi.mock("@/components/ui/dialog", () => ({
-  Dialog: ({
+// v1.4.27 R4 RC2 — the dialog now mounts <ResponsiveSheet>. Its
+// internals (Sheet on `<md`, Dialog on `md+`) both portal at runtime;
+// we collapse the primitive to a plain wrapper so the body of the
+// dialog stays reachable in the static markup.
+vi.mock("@/components/ui/responsive-sheet", () => ({
+  ResponsiveSheet: ({
     open,
+    title,
+    description,
+    footer,
     children,
   }: {
     open: boolean;
+    title: React.ReactNode;
+    description?: React.ReactNode;
+    footer?: React.ReactNode;
     children: React.ReactNode;
-  }) => (open ? <div data-slot="mock-dialog">{children}</div> : null),
-  DialogContent: ({
-    children,
-    ...rest
-  }: React.ComponentProps<"div"> & { children: React.ReactNode }) => (
-    <div data-slot="mock-dialog-content" {...rest}>
-      {children}
-    </div>
-  ),
-  DialogHeader: ({ children }: { children: React.ReactNode }) => (
-    <div data-slot="mock-dialog-header">{children}</div>
-  ),
-  DialogTitle: ({ children }: { children: React.ReactNode }) => (
-    <h2 data-slot="mock-dialog-title">{children}</h2>
-  ),
-  DialogDescription: ({ children }: { children: React.ReactNode }) => (
-    <p data-slot="mock-dialog-description">{children}</p>
-  ),
-  DialogFooter: ({ children }: { children: React.ReactNode }) => (
-    <div data-slot="mock-dialog-footer">{children}</div>
-  ),
+  }) =>
+    open ? (
+      <div data-slot="mock-responsive-sheet">
+        <div data-slot="mock-responsive-sheet-header">
+          <h2 data-slot="mock-responsive-sheet-title">{title}</h2>
+          {description ? (
+            <p data-slot="mock-responsive-sheet-description">{description}</p>
+          ) : null}
+        </div>
+        <div data-slot="mock-responsive-sheet-body">{children}</div>
+        {footer ? (
+          <div data-slot="mock-responsive-sheet-footer">{footer}</div>
+        ) : null}
+      </div>
+    ) : null,
 }));
 
 import { ResearchModeAcknowledgmentDialog } from "../ResearchModeAcknowledgmentDialog";
diff --git a/src/components/medications/phase-config-dialog.tsx b/src/components/medications/phase-config-dialog.tsx
index e4de97eba..541d5073f 100644
--- a/src/components/medications/phase-config-dialog.tsx
+++ b/src/components/medications/phase-config-dialog.tsx
@@ -2,14 +2,7 @@
 
 import { useState } from "react";
 import { useQuery, useMutation, useQueryClient } from "@tanstack/react-query";
-import {
-  Dialog,
-  DialogContent,
-  DialogHeader,
-  DialogTitle,
-  DialogDescription,
-  DialogFooter,
-} from "@/components/ui/dialog";
+import { ResponsiveSheet } from "@/components/ui/responsive-sheet";
 import { Button } from "@/components/ui/button";
 import { Input } from "@/components/ui/input";
 import { Loader2, RotateCcw } from "lucide-react";
@@ -160,15 +153,46 @@ export function PhaseConfigDialog({
   };
 
   return (
-    <Dialog open={open} onOpenChange={onOpenChange}>
-      <DialogContent className="sm:max-w-md">
-        <DialogHeader>
-          <DialogTitle>{t("medications.phaseConfig")}</DialogTitle>
-          <DialogDescription>
-            {t("medications.phaseConfigDescription")}
-          </DialogDescription>
-        </DialogHeader>
-
+    <ResponsiveSheet
+      open={open}
+      onOpenChange={onOpenChange}
+      title={t("medications.phaseConfig")}
+      description={t("medications.phaseConfigDescription")}
+      className="sm:max-w-md"
+      footer={
+        <div className="flex w-full flex-row justify-between gap-2 sm:justify-between">
+          <Button
+            type="button"
+            variant="ghost"
+            size="sm"
+            onClick={() => resetMutation.mutate()}
+            disabled={resetMutation.isPending}
+          >
+            <RotateCcw className="mr-2 h-4 w-4" />
+            {t("medications.phaseResetDefaults")}
+          </Button>
+          <div className="flex gap-2">
+            <Button
+              type="button"
+              variant="outline"
+              onClick={() => onOpenChange(false)}
+            >
+              {t("common.cancel")}
+            </Button>
+            <Button
+              type="button"
+              onClick={() => saveMutation.mutate(form)}
+              disabled={saveMutation.isPending}
+            >
+              {saveMutation.isPending && (
+                <Loader2 className="mr-2 h-4 w-4 animate-spin motion-reduce:animate-none" />
+              )}
+              {t("common.save")}
+            </Button>
+          </div>
+        </div>
+      }
+    >
         {isLoading ? (
           <div className="flex items-center justify-center py-8">
             <Loader2 className="h-6 w-6 animate-spin motion-reduce:animate-none" />
@@ -238,39 +262,6 @@ export function PhaseConfigDialog({
             {statusMessage}
           </div>
         )}
-
-        <DialogFooter className="flex-row justify-between gap-2 sm:justify-between">
-          <Button
-            type="button"
-            variant="ghost"
-            size="sm"
-            onClick={() => resetMutation.mutate()}
-            disabled={resetMutation.isPending}
-          >
-            <RotateCcw className="mr-2 h-4 w-4" />
-            {t("medications.phaseResetDefaults")}
-          </Button>
-          <div className="flex gap-2">
-            <Button
-              type="button"
-              variant="outline"
-              onClick={() => onOpenChange(false)}
-            >
-              {t("common.cancel")}
-            </Button>
-            <Button
-              type="button"
-              onClick={() => saveMutation.mutate(form)}
-              disabled={saveMutation.isPending}
-            >
-              {saveMutation.isPending && (
-                <Loader2 className="mr-2 h-4 w-4 animate-spin motion-reduce:animate-none" />
-              )}
-              {t("common.save")}
-            </Button>
-          </div>
-        </DialogFooter>
-      </DialogContent>
-    </Dialog>
+    </ResponsiveSheet>
   );
 }
diff --git a/src/components/settings/account-section.tsx b/src/components/settings/account-section.tsx
index 3cded990b..5f9898597 100644
--- a/src/components/settings/account-section.tsx
+++ b/src/components/settings/account-section.tsx
@@ -610,7 +610,7 @@ export function AccountSection() {
             </DialogDescription>
           </DialogHeader>
 
-          <form onSubmit={handleChangePassword} className="space-y-3">
+          <form onSubmit={handleChangePassword} className="space-y-4">
             <div className="grid gap-3 sm:grid-cols-3">
               <div className="space-y-2">
                 <Label htmlFor="current-password">
diff --git a/src/components/targets/target-edit-sheet.tsx b/src/components/targets/target-edit-sheet.tsx
index 07d9557ea..157284086 100644
--- a/src/components/targets/target-edit-sheet.tsx
+++ b/src/components/targets/target-edit-sheet.tsx
@@ -1,18 +1,11 @@
 "use client";
 
-import { useId, useRef, useState } from "react";
+import { useEffect, useId, useRef, useState } from "react";
 import { useMutation, useQuery, useQueryClient } from "@tanstack/react-query";
 import { toast } from "sonner";
 import { RotateCcw } from "lucide-react";
 
-import {
-  Dialog,
-  DialogContent,
-  DialogDescription,
-  DialogFooter,
-  DialogHeader,
-  DialogTitle,
-} from "@/components/ui/dialog";
+import { ResponsiveSheet } from "@/components/ui/responsive-sheet";
 import { Button } from "@/components/ui/button";
 import { Input } from "@/components/ui/input";
 import { Label } from "@/components/ui/label";
@@ -106,11 +99,13 @@ export function TargetEditSheet(props: TargetEditSheetProps) {
   // test-friendly: existing tests can render the card without
   // standing up a QueryClientProvider, and the hooks only execute
   // once the user actually clicks the cog.
-  return (
-    <Dialog open={props.open} onOpenChange={props.onOpenChange}>
-      {props.open ? <TargetEditSheetBody {...props} /> : null}
-    </Dialog>
-  );
+  //
+  // v1.4.27 R4 RC2 — migrated raw <Dialog> → <ResponsiveSheet> so the
+  // bottom-sheet branch sticky-pins reset + cancel + save above the
+  // soft keyboard on phones. The lazy-mount toggle stays at this layer
+  // so closed renders never instantiate the TanStack Query hooks.
+  if (!props.open) return null;
+  return <TargetEditSheetBody {...props} />;
 }
 
 function TargetEditSheetBody({
@@ -184,10 +179,25 @@ function TargetEditSheetBody({
   const displayDiaMin = diaMinStr ?? (secondary ? String(secondary.min) : "");
   const displayDiaMax = diaMaxStr ?? (secondary ? String(secondary.max) : "");
 
-  // Focus management — the first input gets focus when the dialog
+  // Focus management — the first input gets focus when the sheet
   // opens, matching the Dashboard chart cog's open-on-focus pattern.
+  // v1.4.27 R4 RC2 — under the ResponsiveSheet primitive we no longer
+  // hook Radix's `onOpenAutoFocus`; a mount effect lands focus on the
+  // primary input as soon as the portal paints.
   const firstInputRef = useRef<HTMLInputElement | null>(null);
   const dialogContentId = useId();
+  useEffect(() => {
+    // Defer one frame so Radix has finished placing the portal before
+    // we steal focus — otherwise the focus jumps to the close-X on
+    // some browsers.
+    const handle = window.requestAnimationFrame(() => {
+      if (firstInputRef.current) {
+        firstInputRef.current.focus();
+        firstInputRef.current.select();
+      }
+    });
+    return () => window.cancelAnimationFrame(handle);
+  }, []);
 
   const updateMutation = useMutation({
     mutationFn: async (
@@ -301,36 +311,73 @@ function TargetEditSheetBody({
       ? Boolean(thresholdsData?.overrides?.[metric])
       : false;
 
+  // v1.4.27 R4 RC2 — focus the first numeric input on mount instead of
+  // relying on Radix's <Dialog>-specific onOpenAutoFocus. The body
+  // only mounts once `open=true` (lazy mount above), so the effect
+  // runs exactly when the surface comes into view.
+  // Note: ResponsiveSheet does not currently expose onOpenAutoFocus —
+  // we use a tiny mount effect to steal focus.
   return (
-    <DialogContent
+    <ResponsiveSheet
+      open
+      onOpenChange={onOpenChange}
+      title={t("targets.edit.title", { metric: targetLabel })}
+      description={
+        isDerivedMetric
+          ? t("targets.edit.derivedHint")
+          : t("targets.edit.description", { unit })
+      }
       className="sm:max-w-md"
-      data-slot="target-edit-sheet"
-      data-target-type={targetType}
-      onOpenAutoFocus={(event) => {
-        // Defer to the first input ref so the user lands on the min
-        // field rather than the close X (default Radix behaviour
-        // focuses the first focusable child).
-        if (firstInputRef.current) {
-          event.preventDefault();
-          firstInputRef.current.focus();
-          firstInputRef.current.select();
-        }
-      }}
-      aria-describedby={dialogContentId}
+      footer={
+        <div className="flex w-full flex-col-reverse gap-2 sm:flex-row sm:items-center sm:justify-between sm:gap-3">
+          {hasOverride ? (
+            <Button
+              variant="ghost"
+              size="sm"
+              onClick={() => resetMutation.mutate()}
+              disabled={busy}
+              data-slot="target-edit-reset"
+            >
+              <RotateCcw className="mr-2 h-3.5 w-3.5" />
+              {t("targets.edit.resetToDefault")}
+            </Button>
+          ) : (
+            <span aria-hidden="true" />
+          )}
+          <div className="flex flex-col-reverse gap-2 sm:flex-row sm:gap-2">
+            <Button
+              variant="outline"
+              size="sm"
+              onClick={() => onOpenChange(false)}
+              disabled={busy}
+            >
+              {t("common.cancel")}
+            </Button>
+            <Button
+              size="sm"
+              onClick={handleSave}
+              disabled={!canSave}
+              data-slot="target-edit-save"
+            >
+              {t("common.save")}
+            </Button>
+          </div>
+        </div>
+      }
     >
-      <DialogHeader>
-        <DialogTitle>
-          {t("targets.edit.title", { metric: targetLabel })}
-        </DialogTitle>
-        <DialogDescription id={dialogContentId}>
+      <div
+        data-slot="target-edit-sheet"
+        data-target-type={targetType}
+        aria-describedby={dialogContentId}
+      >
+        <p id={dialogContentId} className="sr-only">
           {isDerivedMetric
             ? t("targets.edit.derivedHint")
             : t("targets.edit.description", { unit })}
-        </DialogDescription>
-      </DialogHeader>
+        </p>
 
-      {!isDerivedMetric && primaryBounds && (
-        <div className="space-y-4">
+        {!isDerivedMetric && primaryBounds && (
+          <div className="space-y-4">
           <div
             className="grid grid-cols-1 gap-3 sm:grid-cols-2"
             data-slot="target-edit-primary-row"
@@ -414,50 +461,16 @@ function TargetEditSheetBody({
             </div>
           )}
 
-          <p className="text-muted-foreground text-xs">
-            {t("targets.edit.boundsHint", {
-              min: String(primaryBounds.min),
-              max: String(primaryBounds.max),
-              unit: primaryBounds.unit,
-            })}
-          </p>
-        </div>
-      )}
-
-      <DialogFooter className="flex flex-col-reverse gap-2 sm:flex-row sm:items-center sm:justify-between sm:gap-3">
-        {hasOverride ? (
-          <Button
-            variant="ghost"
-            size="sm"
-            onClick={() => resetMutation.mutate()}
-            disabled={busy}
-            data-slot="target-edit-reset"
-          >
-            <RotateCcw className="mr-2 h-3.5 w-3.5" />
-            {t("targets.edit.resetToDefault")}
-          </Button>
-        ) : (
-          <span aria-hidden="true" />
+            <p className="text-muted-foreground text-xs">
+              {t("targets.edit.boundsHint", {
+                min: String(primaryBounds.min),
+                max: String(primaryBounds.max),
+                unit: primaryBounds.unit,
+              })}
+            </p>
+          </div>
         )}
-        <div className="flex flex-col-reverse gap-2 sm:flex-row sm:gap-2">
-          <Button
-            variant="outline"
-            size="sm"
-            onClick={() => onOpenChange(false)}
-            disabled={busy}
-          >
-            {t("common.cancel")}
-          </Button>
-          <Button
-            size="sm"
-            onClick={handleSave}
-            disabled={!canSave}
-            data-slot="target-edit-save"
-          >
-            {t("common.save")}
-          </Button>
-        </div>
-      </DialogFooter>
-    </DialogContent>
+      </div>
+    </ResponsiveSheet>
   );
 }