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/views/SharedPhotoView.vue

@@ -8,7 +8,7 @@
     </h1>
     <div v-if="imageBlob">
       <div v-if="uploading" class="text-center mb-4">
-        <fa icon="spinner" class="fa-spin-pulse" />
+        <font-awesome icon="spinner" class="fa-spin-pulse" />
       </div>
       <div v-else>
         <div class="text-center mb-4">Choose how to use this image</div>
@@ -17,21 +17,21 @@
             @click="recordGift"
             class="text-center text-md font-bold bg-gradient-to-b from-blue-400 to-blue-700 shadow-[inset_0_-1px_0_0_rgba(0,0,0,0.5)] text-white px-2 py-3 rounded-md"
           >
-            <fa icon="gift" class="fa-fw" />
+            <font-awesome icon="gift" class="fa-fw" />
             Record a Gift
           </button>
           <button
             @click="recordProfile"
             class="text-center text-md font-bold bg-gradient-to-b from-blue-400 to-blue-700 shadow-[inset_0_-1px_0_0_rgba(0,0,0,0.5)] text-white px-2 py-3 rounded-md"
           >
-            <fa icon="circle-user" class="fa-fw" />
+            <font-awesome icon="circle-user" class="fa-fw" />
             Save as Profile Image
           </button>
           <button
             @click="cancel"
             class="text-center text-md font-bold bg-gradient-to-b from-slate-400 to-slate-700 shadow-[inset_0_-1px_0_0_rgba(0,0,0,0.5)] text-white px-2 py-3 rounded-md"
           >
-            <fa icon="ban" class="fa-fw" />
+            <font-awesome icon="ban" class="fa-fw" />
             Cancel
           </button>
         </div>