refactor: migrate interfaces to dedicated directory

Reorganizes TypeScript interfaces into a modular structure:
- Create dedicated interfaces directory with specialized files
- Split interfaces by domain (claims, common, limits, records, user)
- Update imports in endorserServer.ts to use new interface locations
- Replace 'any' types with 'unknown' for better type safety
- Add proper type imports and exports

This improves code organization and maintainability by:
- Centralizing interface definitions
- Reducing file size of endorserServer.ts
- Making interface relationships more explicit
- Improving type safety with stricter types

src/components/ImageViewer.vue

@@ -8,7 +8,7 @@
             class="text-white text-2xl p-2 rounded-full hover:bg-white/10"
             @click="close"
           >
-            <fa icon="xmark" />
+            <font-awesome icon="xmark" />
           </button>
 
           <!-- Mobile share button -->
@@ -17,7 +17,7 @@
             class="text-white text-xl p-2 rounded-full hover:bg-white/10"
             @click="handleShare"
           >
-            <fa icon="ellipsis" />
+            <font-awesome icon="ellipsis" />
           </button>
         </div>