Add the trailing period to "einfach produktiv." wherever it was missing

The period is part of the brand name (see Footer.tsx's own comment on
the two-tone logo treatment) — fixed every place it was cleanly
appendable (string/heading endings, or before a dash, matching the
existing precedent in VertragspartnerBlock.tsx). Left the handful of
genuinely awkward mid-sentence spots alone (separable-verb endings,
"einfach produktiv-Konto" hyphenated compounds) rather than force a
period that breaks the sentence — flagging those separately.

Also: Über-mich's checklist now uses the same brand checkmark as
/lebensuhr and /7-tage-klarheits-check instead of plain bullets.

app/lib/structuredData.ts

@@ -23,7 +23,7 @@ export function buildOrganizationSchema(seller: CompanySettings | null): Record<
       "@context": "https://schema.org",
       "@type": "Organization",
       "@id": `${SITE_URL}/#organization`,
-      name: "einfach produktiv",
+      name: "einfach produktiv.",
       url: SITE_URL,
     };
   }
@@ -91,7 +91,7 @@ export function buildArticleSchema(
     // "Björn" is already hardcoded in the page's own author-bio block,
     // matched here rather than left out entirely.
     author: { "@type": "Person", name: "Björn" },
-    publisher: seller ? { "@id": `${SITE_URL}/#organization` } : { "@type": "Organization", name: "einfach produktiv" },
+    publisher: seller ? { "@id": `${SITE_URL}/#organization` } : { "@type": "Organization", name: "einfach produktiv." },
   };
 }