feat(t5): Fokusring für alle, 44-px-Ziele bei Touch, 16-px-Schrift (T5a A5)

- globals.css: eine Basisregel :where(:focus-visible) mit --focus-width
  und --focus-offset (Sonne 3 px), Firefox-:-moz-focusring gleichgezogen;
  --text-xs 0.8125rem.
- Fokus-Codemod (scripts/codemod-t5-focus.mjs): eigene Ringe und
  outline-none raus, sm:h-/sm:size- zu pointer-fine:, Label-Zeilen mit
  focus-ring-within; Skript-Fokus (Lücken-Liste, „Gespeichert“) bleibt.
- Button/Input 44 px, kompakt nur mit Maus; Icon-Knöpfe mit unsichtbarer
  44-px-Trefferfläche bei Touch, Nachbarn mit genug Abstand.
- 16 px in Feldern, Labels, Auswahl, Leerzuständen, Listentiteln.
- .holo-stage auf allen Beute-Bühnen, .stage-card holt den Seitenring.
- Baukasten-Wächter (src/styles/baukasten-guard.spec.ts) mit den Regeln
  aus A3–A5, Ausnahmen mit Grund; Kalender-Auswahl als Inset-Ring.

Co-Authored-By: Claude Opus 5.5 (1M context) <[email protected]>

ApiCore-Frontend/src/components/area-migration.spec.ts

@@ -19,18 +19,7 @@ function read(relative: string): string {
 }
 
 describe("area migration", () => {
-  it("no file passes a gradient prop any more", () => {
-    const offenders = sourceFiles(SRC).filter((file) => {
-      const text = readFileSync(file, "utf8");
-      return /gradient=|var\(--gradient-|\[background-image:var\(--gradient/.test(text);
-    });
-    expect(offenders).toEqual([]);
-  });
-
-  it("no source uses or defines the --gradient tokens any more (removed in task A4)", () => {
-    const offenders = sourceFiles(SRC).filter((file) => /--gradient-/.test(readFileSync(file, "utf8")));
-    expect(offenders).toEqual([]);
-  });
+  // The gradient and white-text rules live in src/styles/baukasten-guard.spec.ts (task A5).
 
   it("harvest detail uses Scissors, extraction create FlaskConical and storage only Warehouse", () => {
     expect(read("app/(app)/harvests/[id]/page.tsx")).toContain('area="harvests"');
@@ -54,15 +43,4 @@ describe("area migration", () => {
     });
     expect(offenders).toEqual([]);
   });
-
-  it("no white text outside the hive stage", () => {
-    const offenders = sourceFiles(SRC)
-      .filter((file) => !file.replaceAll("\\", "/").includes("/components/hive/"))
-      .filter((file) => /\btext-white\b/.test(readFileSync(file, "utf8")));
-    expect(offenders).toEqual([]);
-  });
-
-  it("the stage overlay on the hive stage uses the holo label colour instead of white", () => {
-    expect(read("components/hive/editor/editor-stage-overlay.tsx")).not.toMatch(/\btext-white\b/);
-  });
 });