fix(mobile): render notes with marked (proper Markdown→HTML) + design CSS soigné

- Install marked package (UMD, hors-ligne)
- buildHtml: parse Markdown server-side avec marked, inject HTML statique
- CSS: typographie soignée, blockquotes brandés, code dark, tables propres
- Plus de CDN, fonctionne hors-ligne

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

memento-mobile/tsconfig.json

@@ -3,8 +3,16 @@
   "compilerOptions": {
     "strict": true,
     "paths": {
-      "@/*": ["./*"]
+      "@/*": [
+        "./*"
+      ]
     }
   },
-  "include": ["**/*.ts", "**/*.tsx", ".expo/types/**/*.d.ts", "expo-env.d.ts"]
+  "include": [
+    "**/*.ts",
+    "**/*.tsx",
+    ".expo/types/**/*.d.ts",
+    "expo-env.d.ts",
+    ".expo/types/**/*.ts"
+  ]
 }