fix: internationalize hardcoded English strings from PR #15

Add i18n keys for "locked", "unlocksAtTier" in both DE and EN.
Closes part of #16 (Muss: i18n)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: raifdmueller

src/components/MitigationCard.jsx

@@ -35,7 +35,7 @@ export default function MitigationCard({ group, active, accent, t }) {
             <div className={styles.subtitle} style={{ opacity: active ? 1 : 0.4 }}>
               {active
                 ? `${group.measures.length} ${group.measures.length !== 1 ? t.measures : t.measure}`
-                : `Unlocks at Tier ${group.tier}`}
+                : t.unlocksAtTier(group.tier)}
             </div>
           </div>
         </div>

src/components/RiskRadar.jsx

@@ -259,7 +259,7 @@ export default function RiskRadar() {
                 <div className={styles.lockedSummary}>
                   <span className={styles.lockedIcon}>🔒</span>
                   <span className={styles.lockedText}>
-                    {lockedCount} locked {lockedCount !== 1 ? t.measures : t.measure}
+                    {lockedCount} {t.locked} {lockedCount !== 1 ? t.measures : t.measure}
                     {" — "}
                     {locked.map((g, i) => (
                       <span key={g.tier}>

src/i18n.js

@@ -14,6 +14,8 @@ const T = {
     mitigationHeading: "Erforderliche Mitigationsmaßnahmen",
     measures: "Maßnahmen",
     measure: "Maßnahme",
+    locked: "gesperrt",
+    unlocksAtTier: (tier) => `Verfügbar ab Tier ${tier}`,
     docsButton: "Dokumentation",
     closeButton: "Schließen",
     langSwitch: "EN",
@@ -374,6 +376,8 @@ Quellcode der Skills: https://github.com/LLM-Coding/vibe-coding-risk-radar/tree/
     mitigationHeading: "Required Mitigation Measures",
     measures: "measures",
     measure: "measure",
+    locked: "locked",
+    unlocksAtTier: (tier) => `Unlocks at Tier ${tier}`,
     docsButton: "Documentation",
     closeButton: "Close",
     langSwitch: "DE",