Apple-natives Design: SF Symbols statt Emojis, iOS-System-Optik

- Neue Ikone-Komponente (expo-symbols): echte SF Symbols auf iOS,
  Material Symbols auf Android — alle Emojis in Buttons/Kacheln/
  Checkboxen/Ampel/Chevrons ersetzt
- Theme: iOS-Systemgrau (#F2F2F7) statt Papier-Ton, weiße Karten ohne
  Rahmen und Schatten (wie Einstellungen/Health), "graue Taste" für
  Sekundär-Buttons statt Umrandung
- Kernaussage-Karte: dezenter Marken-Tint statt Textmarker-Gelb
- Frist/Termin-Zeilen ohne Emoji-Präfixe
- Layout unverändert (Kacheln, Ampel-Streifen, großer Titel)

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

package-lock.json

@@ -28,6 +28,7 @@
         "expo-speech": "~57.0.0",
         "expo-splash-screen": "~57.0.2",
         "expo-status-bar": "~57.0.0",
+        "expo-symbols": "~57.0.1",
         "react": "19.2.3",
         "react-native": "0.86.0",
         "react-native-safe-area-context": "~5.7.0",
@@ -1275,6 +1276,12 @@
       "dev": true,
       "license": "MIT"
     },
+    "node_modules/@expo-google-fonts/material-symbols": {
+      "version": "0.4.41",
+      "resolved": "https://registry.npmjs.org/@expo-google-fonts/material-symbols/-/material-symbols-0.4.41.tgz",
+      "integrity": "sha512-BKNSJ6oFGWi+aXu6PF+1EdI43J8Ag+Sm7Ste1SXYmC2eYOJasyjXHkKjgkIieBB1eDZQJSPWuPv421Vg6N5tCQ==",
+      "license": "MIT AND Apache-2.0"
+    },
     "node_modules/@expo/code-signing-certificates": {
       "version": "0.0.6",
       "resolved": "https://registry.npmjs.org/@expo/code-signing-certificates/-/code-signing-certificates-0.0.6.tgz",
@@ -4254,6 +4261,20 @@
         "react-native": "*"
       }
     },
+    "node_modules/expo-font": {
+      "version": "57.0.1",
+      "resolved": "https://registry.npmjs.org/expo-font/-/expo-font-57.0.1.tgz",
+      "integrity": "sha512-QyS9L1Kh9sKJg4gfU6rdbpxpmH+DyzBX8z6jVvXMUDoqLr1GqmkO/Wu379KCXjL///kWbhpNlbi7AgBuj4VdIQ==",
+      "license": "MIT",
+      "dependencies": {
+        "fontfaceobserver": "^2.1.0"
+      },
+      "peerDependencies": {
+        "expo": "*",
+        "react": "*",
+        "react-native": "*"
+      }
+    },
     "node_modules/expo-image-loader": {
       "version": "57.0.0",
       "resolved": "https://registry.npmjs.org/expo-image-loader/-/expo-image-loader-57.0.0.tgz",
@@ -4450,6 +4471,22 @@
         "react-native": "*"
       }
     },
+    "node_modules/expo-symbols": {
+      "version": "57.0.1",
+      "resolved": "https://registry.npmjs.org/expo-symbols/-/expo-symbols-57.0.1.tgz",
+      "integrity": "sha512-8Zf+a83OywV0vf1NUtSKpNqKcULmO0GTI+zfFnGYl7SLDH9FjL5RcEZoy6CHvCgq2KDrQF21pl3r7Tb4ItPscw==",
+      "license": "MIT",
+      "dependencies": {
+        "@expo-google-fonts/material-symbols": "^0.4.1",
+        "sf-symbols-typescript": "^2.0.0"
+      },
+      "peerDependencies": {
+        "expo": "*",
+        "expo-font": "*",
+        "react": "*",
+        "react-native": "*"
+      }
+    },
     "node_modules/expo/node_modules/@expo/cli": {
       "version": "57.0.6",
       "resolved": "https://registry.npmjs.org/@expo/cli/-/cli-57.0.6.tgz",
@@ -4761,20 +4798,6 @@
         "react-native": "*"
       }
     },
-    "node_modules/expo/node_modules/expo-font": {
-      "version": "57.0.0",
-      "resolved": "https://registry.npmjs.org/expo-font/-/expo-font-57.0.0.tgz",
-      "integrity": "sha512-zF+J7WrNFjqyAADwdvDgkFEoIQv9DqcjJ57HVstNEH7/7Tx1ThPEhKraodEQOwSjMYWirP+4BYsVbdb+/Zr4QQ==",
-      "license": "MIT",
-      "dependencies": {
-        "fontfaceobserver": "^2.1.0"
-      },
-      "peerDependencies": {
-        "expo": "*",
-        "react": "*",
-        "react-native": "*"
-      }
-    },
     "node_modules/expo/node_modules/expo-keep-awake": {
       "version": "57.0.0",
       "resolved": "https://registry.npmjs.org/expo-keep-awake/-/expo-keep-awake-57.0.0.tgz",