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/PushNotificationPermission.vue

@@ -25,7 +25,7 @@
           </p>
           <p v-else class="text-lg mb-4">
             Waiting for system initialization, which may take up to 5 seconds...
-            <fa icon="spinner" spin />
+            <font-awesome icon="spinner" spin />
           </p>
 
           <div v-if="serviceWorkerReady && vapidKey">
@@ -69,8 +69,8 @@
                   class="rounded-r border border-slate-400 bg-slate-200 text-center text-blue-500 mt-2 px-2 py-2 w-20"
                   @click="hourAm = !hourAm"
                 >
-                  <span v-if="hourAm"> AM <fa icon="chevron-down" /> </span>
-                  <span v-else> PM <fa icon="chevron-up" /> </span>
+                  <span v-if="hourAm"> AM <font-awesome icon="chevron-down" /> </span>
+                  <span v-else> PM <font-awesome icon="chevron-up" /> </span>
                 </span>
               </span>
             </div>