diff --git a/src/app/settings/[section]/page.tsx b/src/app/settings/[section]/page.tsx
index fda17e53f..81b86cce4 100644
--- a/src/app/settings/[section]/page.tsx
+++ b/src/app/settings/[section]/page.tsx
@@ -11,7 +11,10 @@ import { ExportSection } from "@/components/settings/export-section";
 import { IntegrationsSection } from "@/components/settings/integrations-section";
 import { NotificationsSection } from "@/components/settings/notifications-section";
 import { SectionPlaceholder } from "@/components/settings/section-placeholder";
-import { SourcesSection } from "@/components/settings/sources-section";
+// v1.4.34 IW-D — `sources` slug was retired (merged into `thresholds`).
+// The combined "Targets & Sources" component lives in
+// `thresholds-section.tsx`; `/settings/sources` is now a
+// `permanentRedirect` handled by the dedicated route file.
 import { ThresholdsSection } from "@/components/settings/thresholds-section";
 import {
   SETTINGS_SECTION_SLUGS,
@@ -46,7 +49,6 @@ const SECTION_COMPONENTS: Record<
   notifications: NotificationsSection,
   dashboard: DashboardSection,
   thresholds: ThresholdsSection,
-  sources: SourcesSection,
   api: ApiSection,
   export: ExportSection,
   advanced: AdvancedSection,
diff --git a/src/app/settings/sources/page.tsx b/src/app/settings/sources/page.tsx
new file mode 100644
index 000000000..198bb3d30
--- /dev/null
+++ b/src/app/settings/sources/page.tsx
@@ -0,0 +1,23 @@
+import { permanentRedirect } from "next/navigation";
+
+/**
+ * v1.4.34 IW-D — `/settings/sources` permanent redirect.
+ *
+ * The Sources settings section was merged into `/settings/thresholds`
+ * (now titled "Targets & Sources" / "Zielwerte & Quellen"). The two
+ * editors share the same per-metric configuration shelf and reading
+ * them side-by-side on one page matches how a user actually thinks
+ * about metric configuration ("for this metric, which sources do I
+ * trust AND what range counts as healthy?"). Per
+ * `.planning/research/v1434-r-2-carryover-scope.md` §7 and
+ * `.planning/round-v1433-audit-menu.md` §7.1 (item 3).
+ *
+ * 308 (`permanentRedirect`) keeps the request method intact so any
+ * external system that POSTs (none today, but cheap insurance) follows
+ * through with its original method. Existing bookmarks, iOS Settings
+ * deep-links, and any docs that referenced `/settings/sources`
+ * continue to resolve.
+ */
+export default function SettingsSourcesRedirect(): never {
+  permanentRedirect("/settings/thresholds");
+}
diff --git a/src/components/settings/__tests__/sections.test.tsx b/src/components/settings/__tests__/sections.test.tsx
index 5e6f4520f..170f0c6f1 100644
--- a/src/components/settings/__tests__/sections.test.tsx
+++ b/src/components/settings/__tests__/sections.test.tsx
@@ -79,6 +79,14 @@ vi.mock("@/components/settings/dashboard-layout-section", () => ({
 vi.mock("@/components/settings/thresholds-editor-section", () => ({
   ThresholdsEditorSection: () => <div data-testid="thresholds-editor" />,
 }));
+// v1.4.34 IW-D — `<ThresholdsSection>` now also embeds
+// `<SourcesSection mode="embedded">` so the combined "Targets &
+// Sources" page reads as one shelf. The SourcesSection itself owns
+// React Query and TanStack mutation wiring; stub it at the import
+// boundary to keep the SSR smoke test focused on the wrapper.
+vi.mock("@/components/settings/sources-section", () => ({
+  SourcesSection: () => <div data-testid="sources-section" />,
+}));
 
 import { I18nProvider } from "@/lib/i18n/context";
 import { AboutSection } from "../about-section";
@@ -197,28 +205,26 @@ describe("settings sections — SSR smoke", () => {
     expect(html).toContain("Quellen &amp; Dokumentation");
   });
 
-  it("<ThresholdsSection> renders heading and embeds the editor (B6 rename)", () => {
+  it("<ThresholdsSection> renders heading and embeds both editors (v1.4.34 IW-D merge)", () => {
     // v1.4.16 phase B6 contract: the route wrapper is named
     // `<ThresholdsSection>` (was `<ThresholdsSettingsSection>`), lives
     // at `thresholds-section.tsx`, and embeds the inner editor under
-    // `<ThresholdsEditorSection>` (was `<ThresholdsSection>`). The
-    // mock above stubs the editor as `data-testid="thresholds-editor"`,
-    // so this test asserts:
-    //   - the wrapper renders without throwing
-    //   - the localised page title surfaces
-    //   - the editor mount-point is present
-    //   - no raw i18n key leaks
+    // `<ThresholdsEditorSection>` (was `<ThresholdsSection>`).
+    // v1.4.34 IW-D — the wrapper now also embeds
+    // `<SourcesSection mode="embedded">` so the page is the merged
+    // "Targets & Sources" surface. Both editor mounts must be present.
     const html = render(<ThresholdsSection />);
-    // F-07 (v1.4.19): page title aligned with the URL slug — was
-    // "Personal targets", now "Personal thresholds".
-    expect(html).toContain("Personal thresholds");
+    // v1.4.34 IW-D: section renamed to "Targets & Sources".
+    expect(html).toContain("Targets &amp; Sources");
     expect(html).toContain('data-testid="thresholds-editor"');
+    expect(html).toContain('data-testid="sources-section"');
     expect(html).not.toContain("settings.sections.thresholds.");
   });
 
-  it("<ThresholdsSection> resolves the German title (B6 rename)", () => {
+  it("<ThresholdsSection> resolves the German title (B6 rename + IW-D merge)", () => {
     const html = render(<ThresholdsSection />, "de");
-    expect(html).toContain("Persönliche Zielwerte");
+    expect(html).toContain("Zielwerte &amp; Quellen");
     expect(html).toContain('data-testid="thresholds-editor"');
+    expect(html).toContain('data-testid="sources-section"');
   });
 });
diff --git a/src/components/settings/__tests__/settings-shell.test.tsx b/src/components/settings/__tests__/settings-shell.test.tsx
index 66385f056..c5f61ea90 100644
--- a/src/components/settings/__tests__/settings-shell.test.tsx
+++ b/src/components/settings/__tests__/settings-shell.test.tsx
@@ -35,7 +35,7 @@ function renderShell(props: {
 }
 
 describe("SETTINGS_SECTION_SLUGS", () => {
-  it("declares the eleven sections agreed for v1.4.25", () => {
+  it("declares the ten sections agreed for v1.4.34", () => {
     // Order matters — `generateStaticParams()` and the sidebar derive their
     // ordering from this constant, so a reorder is a behaviour change.
     // v1.4.3 split the dashboard panel: layout stays under `dashboard`,
@@ -48,13 +48,15 @@ describe("SETTINGS_SECTION_SLUGS", () => {
     // per-metric-class source-priority surface lives next to the other
     // analytics-shaping controls (thresholds → ranges; sources →
     // canonical source per metric).
+    // v1.4.34 IW-D — `sources` slug was retired (merged into
+    // `thresholds`, now "Targets & Sources"). `/settings/sources` stays
+    // alive as a `permanentRedirect`. Section count: 10 (was 11).
     expect([...SETTINGS_SECTION_SLUGS]).toEqual([
       "account",
       "integrations",
       "notifications",
       "dashboard",
       "thresholds",
-      "sources",
       "ai",
       "api",
       "export",
@@ -162,6 +164,11 @@ describe("<SettingsShell>", () => {
     // in the sidebar user-card dropdown. Route `/settings/about` is
     // still alive for direct links.
     expect(html).not.toContain('href="/settings/about"');
+    // v1.4.34 IW-D — Sources slug retired; merged into Targets & Sources
+    // under `/settings/thresholds`. The Sources nav entry must not
+    // appear; the route stays alive via permanentRedirect.
+    expect(html).not.toContain('href="/settings/sources"');
+    expect(html).toContain("Targets &amp; Sources");
   });
 
   it("resolves every section title via the i18n provider — German", () => {
@@ -177,7 +184,9 @@ describe("<SettingsShell>", () => {
     // per-metric overrides moved out into their own "Persönliche Zielwerte"
     // section, which is the new entry below the Dashboard one.
     expect(html).toContain("Dashboard");
-    expect(html).toContain("Persönliche Zielwerte");
+    // v1.4.34 IW-D — section renamed from "Persönliche Zielwerte" to
+    // "Zielwerte & Quellen" (combined with the former Sources section).
+    expect(html).toContain("Zielwerte &amp; Quellen");
     // v1.4.33 IW7 — "KI-Auswertungen" renamed to "Auswertungen" per
     // the Marc-Voice rule (no "KI"/"AI" prefix in user-facing copy).
     expect(html).toContain("Auswertungen");
@@ -187,6 +196,9 @@ describe("<SettingsShell>", () => {
     // v1.4.33 IW7 — "Über" (About) section removed from the in-shell
     // nav, folded into the sidebar user-card dropdown ("Über HealthLog").
     expect(html).not.toContain('href="/settings/about"');
+    // v1.4.34 IW-D — Sources nav entry retired (merged into Targets &
+    // Sources).
+    expect(html).not.toContain('href="/settings/sources"');
   });
 
   it("does NOT surface the raw key when a translation resolves — guards against missing JSON entries", () => {
diff --git a/src/components/settings/section-placeholder.tsx b/src/components/settings/section-placeholder.tsx
index 3f05ea25d..0a8681a54 100644
--- a/src/components/settings/section-placeholder.tsx
+++ b/src/components/settings/section-placeholder.tsx
@@ -16,7 +16,6 @@ import {
   Download,
   Info,
   KeyRound,
-  Layers,
   LayoutDashboard,
   Link2,
   Settings2,
@@ -36,7 +35,6 @@ const SLUG_ICON: Record<SettingsSectionSlug, LucideIcon> = {
   notifications: Bell,
   dashboard: LayoutDashboard,
   thresholds: SlidersHorizontal,
-  sources: Layers,
   ai: Sparkles,
   api: KeyRound,
   export: Download,
diff --git a/src/components/settings/section-slugs.ts b/src/components/settings/section-slugs.ts
index 9004e4af0..e242d9891 100644
--- a/src/components/settings/section-slugs.ts
+++ b/src/components/settings/section-slugs.ts
@@ -6,13 +6,20 @@
  * graph.
  */
 
+// v1.4.34 IW-D — `sources` slug was retired. The two former sections
+// (`/settings/thresholds` and `/settings/sources`) merged into a single
+// "Targets & Sources" page under `/settings/thresholds`. The historic
+// `/settings/sources` URL stays alive as a `permanentRedirect` (see
+// `src/app/settings/sources/page.tsx`) so external bookmarks (iOS,
+// docs) follow through unchanged. Per
+// `.planning/research/v1434-r-2-carryover-scope.md` §7 and
+// `.planning/round-v1433-audit-menu.md` §7.1 (item 3).
 export const SETTINGS_SECTION_SLUGS = [
   "account",
   "integrations",
   "notifications",
   "dashboard",
   "thresholds",
-  "sources",
   "ai",
   "api",
   "export",
diff --git a/src/components/settings/settings-shell.tsx b/src/components/settings/settings-shell.tsx
index 6fff0f990..dca91628b 100644
--- a/src/components/settings/settings-shell.tsx
+++ b/src/components/settings/settings-shell.tsx
@@ -21,7 +21,6 @@ import {
   Bell,
   Download,
   KeyRound,
-  Layers,
   LayoutDashboard,
   Link2,
   Settings2,
@@ -73,6 +72,15 @@ interface SettingsSection {
  * keeps emitting the page — but it no longer appears in the in-page
  * navigation. Direct links (the user-card dropdown, the public
  * `/about` permalink) continue to resolve to the same component.
+ *
+ * v1.4.34 IW-D — `sources` was merged into `thresholds` (now titled
+ * "Targets & Sources" / "Zielwerte & Quellen"). The combined section
+ * surfaces per-metric source priority alongside the threshold inputs
+ * on a single page. `/settings/sources` stays alive as a
+ * `permanentRedirect` so external bookmarks keep working; the slug
+ * was dropped from `SETTINGS_SECTION_SLUGS` because the dynamic
+ * `[section]` route no longer serves it. Per
+ * `.planning/research/v1434-r-2-carryover-scope.md` §7.
  */
 export const SETTINGS_SECTIONS: readonly SettingsSection[] = [
   { slug: "account", titleKey: "settings.sections.account.title", icon: User },
@@ -96,11 +104,6 @@ export const SETTINGS_SECTIONS: readonly SettingsSection[] = [
     titleKey: "settings.sections.thresholds.title",
     icon: SlidersHorizontal,
   },
-  {
-    slug: "sources",
-    titleKey: "settings.sections.sources.title",
-    icon: Layers,
-  },
   { slug: "ai", titleKey: "settings.sections.ai.title", icon: Sparkles },
   { slug: "api", titleKey: "settings.sections.api.title", icon: KeyRound },
   {
diff --git a/src/components/settings/sources-section.tsx b/src/components/settings/sources-section.tsx
index ecb6c24f8..ce96c3eab 100644
--- a/src/components/settings/sources-section.tsx
+++ b/src/components/settings/sources-section.tsx
@@ -98,7 +98,26 @@ const DEVICE_TYPE_LABEL_KEYS: Record<DeviceType, string> = {
   unknown: "settings.sections.sources.deviceLabels.unknown",
 };
 
-export function SourcesSection() {
+/**
+ * v1.4.34 IW-D — section presentation mode.
+ *   - `"standalone"` (default) renders the page-level header (h1 +
+ *     subtitle) and keeps the section's own aria-labelledby wiring.
+ *   - `"embedded"` drops the header because a parent surface
+ *     (`<ThresholdsSection>` on `/settings/thresholds`) already names
+ *     the page. The section becomes a `<div>` instead of a
+ *     `<section>` so the assistive-tech reading order stays one
+ *     combined surface.
+ *
+ * `/settings/sources` no longer renders this component directly — it
+ * permanently redirects to `/settings/thresholds`, which uses the
+ * `embedded` mode. The default keeps backward compatibility for any
+ * test/storybook that still mounts `<SourcesSection />` standalone.
+ */
+export interface SourcesSectionProps {
+  mode?: "standalone" | "embedded";
+}
+
+export function SourcesSection({ mode = "standalone" }: SourcesSectionProps = {}) {
   const { t } = useTranslations();
   const queryClient = useQueryClient();
 
@@ -273,22 +292,32 @@ export function SourcesSection() {
     return Object.keys(priority.deviceTypePriority).length;
   }, [priority]);
 
+  // v1.4.34 IW-D — `embedded` mode skips the section header because the
+  // parent surface (`<ThresholdsSection>`) already names the page.
+  const isStandalone = mode === "standalone";
+  const Wrapper = isStandalone ? "section" : "div";
+  const wrapperProps = isStandalone
+    ? {
+        "aria-labelledby": "settings-section-sources-title",
+        className: "space-y-6",
+      }
+    : { className: "space-y-6" };
+
   return (
-    <section
-      aria-labelledby="settings-section-sources-title"
-      className="space-y-6"
-    >
-      <header className="space-y-1">
-        <h1
-          id="settings-section-sources-title"
-          className="text-2xl font-semibold tracking-tight"
-        >
-          {t("settings.sections.sources.title")}
-        </h1>
-        <p className="text-muted-foreground text-sm">
-          {t("settings.sections.sources.description")}
-        </p>
-      </header>
+    <Wrapper {...wrapperProps}>
+      {isStandalone && (
+        <header className="space-y-1">
+          <h1
+            id="settings-section-sources-title"
+            className="text-2xl font-semibold tracking-tight"
+          >
+            {t("settings.sections.sources.title")}
+          </h1>
+          <p className="text-muted-foreground text-sm">
+            {t("settings.sections.sources.description")}
+          </p>
+        </header>
+      )}
 
       <div className="bg-card border-border space-y-4 rounded-xl border p-6">
         <div className="flex flex-col gap-2 sm:flex-row sm:items-center sm:justify-between sm:gap-3">
@@ -570,7 +599,7 @@ export function SourcesSection() {
           </div>
         )}
       </div>
-    </section>
+    </Wrapper>
   );
 }
 
diff --git a/src/components/settings/thresholds-section.tsx b/src/components/settings/thresholds-section.tsx
index 68cd4d93b..096045b09 100644
--- a/src/components/settings/thresholds-section.tsx
+++ b/src/components/settings/thresholds-section.tsx
@@ -1,19 +1,47 @@
 "use client";
 
+import { SourcesSection } from "@/components/settings/sources-section";
 import { ThresholdsEditorSection } from "@/components/settings/thresholds-editor-section";
 import { useTranslations } from "@/lib/i18n/context";
 
 /**
  * `<ThresholdsSection>` — route-level wrapper for `/settings/thresholds`.
  *
+ * v1.4.34 IW-D — section was renamed "Zielwerte & Quellen" / "Targets &
+ * Sources" and absorbs the former `/settings/sources` content. The two
+ * editors stay distinct mutation flows (`/api/user/thresholds` for
+ * ranges + `/api/auth/me/source-priority` for source ladders) so a save
+ * on one half never disturbs the other; presenting them on a single
+ * page collapses two adjacent sidebar slots into one and matches the
+ * Settings nav audit (§7.1 item 3 in
+ * `.planning/round-v1433-audit-menu.md` — both screens were per-metric
+ * configuration shelves and reading them together matches how a user
+ * actually thinks about a metric: "for this metric, which sources do
+ * I trust AND what range counts as healthy?").
+ *
+ * `/settings/sources` stays alive as a `permanentRedirect` (see
+ * `src/app/settings/sources/page.tsx`) so external bookmarks (iOS
+ * Settings deep-links, docs) keep resolving.
+ *
+ * Visual structure on this page:
+ *   1. Section header (combined title + description).
+ *   2. `<ThresholdsEditorSection>` — per-metric range inputs (top).
+ *      The editor card kept its own affordance row (icon, reset-all
+ *      button) so the action surface stays compact.
+ *   3. `<SourcesSection>` body — per-metric source priority + the
+ *      two-axis device-type expander (bottom). The inner section's
+ *      header was suppressed in `mode="embedded"` because the page
+ *      header above already names the surface.
+ *
  * v1.4.16 phase B6: file renamed from the historic
- * `thresholds-settings-section.tsx` (`<ThresholdsSettingsSection>`) so the
- * filename + default export match the slug — every other section in
- * `src/components/settings/` follows the `<slug>-section.tsx`
- * `<SlugSection>` convention. The inner editor card was simultaneously
- * moved out of `thresholds-section.tsx` (where it used to live as
- * `<ThresholdsSection>`) into `thresholds-editor-section.tsx`
- * (`<ThresholdsEditorSection>`) so the names stop clashing.
+ * `thresholds-settings-section.tsx` (`<ThresholdsSettingsSection>`)
+ * so the filename + default export match the slug — every other
+ * section in `src/components/settings/` follows the
+ * `<slug>-section.tsx` `<SlugSection>` convention. The inner editor
+ * card was simultaneously moved out of `thresholds-section.tsx`
+ * (where it used to live as `<ThresholdsSection>`) into
+ * `thresholds-editor-section.tsx` (`<ThresholdsEditorSection>`) so
+ * the names stop clashing.
  */
 export function ThresholdsSection() {
   const { t } = useTranslations();
@@ -35,7 +63,15 @@ export function ThresholdsSection() {
         </p>
       </header>
 
+      {/* Per-metric threshold ranges — top card. */}
       <ThresholdsEditorSection id="thresholds" />
+
+      {/* Per-metric source priority + two-axis device-type ladder —
+          bottom card. `mode="embedded"` suppresses the inner h1 +
+          subtitle (the page header above owns the surface name) and
+          drops the inner `<section>` aria-label so the assistive-tech
+          reading order stays one combined surface, not two. */}
+      <SourcesSection mode="embedded" />
     </section>
   );
 }