fix(i18n): drop the "KI"/"AI" prefix from user-facing copy

Marc-Voice rule — the product never names itself "KI" or "AI" in
copy. Settings -> "KI-Auswertungen" becomes "Auswertungen" / "Insights",
the inner "KI-Insights" card heading collapses into the parent section
heading, "Aktiver KI-Provider" becomes "Aktiver Provider", and the
admin "AI Quality" view becomes "Insights Quality".

Sweep across de / en / es / fr / it / pl. Provider product names
(Anthropic, Claude, ChatGPT, OpenAI) are unchanged — those are
proper nouns, not the "AI" label.

src/components/admin/__tests__/ai-quality-section.test.tsx

@@ -57,7 +57,9 @@ describe("<AiQualitySection>", () => {
     mockQueryState.isLoading = false;
     mockQueryState.isError = false;
     const html = render(<AiQualitySection />);
-    expect(html).toContain("AI Quality");
+    // v1.4.33 IW7 — admin section renamed from "AI Quality" to
+    // "Insights Quality" per the Marc-Voice rule.
+    expect(html).toContain("Insights Quality");
     expect(html).toContain("No feedback yet");
   });
 
@@ -118,6 +120,6 @@ describe("<AiQualitySection>", () => {
     mockQueryState.isLoading = false;
     mockQueryState.isError = true;
     const html = render(<AiQualitySection />);
-    expect(html).toContain("Failed to load AI quality summary");
+    expect(html).toContain("Failed to load Insights quality summary");
   });
 });

src/components/admin/__tests__/sections.test.tsx

@@ -148,7 +148,10 @@ describe("admin sections — SSR smoke", () => {
   // ai-quality-section test.
   it("<AiQualitySection> renders the empty-state when no summary exists", () => {
     const html = render(<AiQualitySection />);
-    expect(html).toContain("AI Quality");
+    // v1.4.33 IW7 — section renamed from "AI Quality" to
+    // "Insights Quality" per the Marc-Voice rule (no "KI"/"AI" prefix
+    // in user-facing copy).
+    expect(html).toContain("Insights Quality");
     expect(html).toContain("No feedback yet");
   });