fix(accounts): simplify identity copy tooltips

Show only the copy action in populated username and email cell tooltips instead of repeating values already visible in the table. Preserve explicit accessible button labels and add German and English regression coverage.

tests/i18n.test.ts

@@ -70,6 +70,7 @@ describe("renderer localization", () => {
       .toBe("Do you really want to remove the empty collection Tab 2?");
     expect(translateUiText("Link kopieren", "en")).toBe("Copy Link");
     expect(translateUiText("example.test Klicken zum Kopieren", "en")).toBe("Click to copy example.test");
+    expect(translateUiText("Klicken zum Kopieren", "en")).toBe("Click to copy");
     expect(translateUiText("Geschwindigkeit verschieben", "en")).toBe("Move Speed");
     expect(translateUiText("Geschwindigkeit nach links verschieben", "en")).toBe("Move Speed left");
     expect(translateUiText("Move Speed right", "de")).toBe("Geschwindigkeit nach rechts verschieben");

tests/settings-view.test.tsx

@@ -834,6 +834,8 @@ describe("account workspace", () => {
       })
     });
     const buttons = findElements(tree, (element) => String(element.props.className || "").includes("settings-account-copy-button"));
+    const copyableCells = findElements(tree, (element) => ["settings-account-username", "settings-account-email"].includes(String(element.props.className || "")))
+      .filter((element) => element.props.title === "Klicken zum Kopieren");
     const username = buttons.find((button) => button.props["aria-label"] === "Benutzername kopieren");
     const email = buttons.find((button) => button.props["aria-label"] === "E-Mail kopieren");
     let stopped = 0;
@@ -843,6 +845,7 @@ describe("account workspace", () => {
     username?.props.onDoubleClick({ stopPropagation: () => { stopped += 1; } });
 
     expect(buttons.some((button) => button.props.children === "—")).toBe(false);
+    expect(copyableCells).toHaveLength(buttons.length);
     expect(copies).toEqual([
       "Benutzername:stored-user",
       "E-Mail:verified@example.test"