refactor: update dependencies and remove unused code

- Added new dependencies: `adler2`, `crc32fast`, `flate2`, `miniz_oxide`, and `libredox`.
- Updated existing dependencies: `tokio-rustls` to version 0.26.4 and `filetime` to version 0.2.27.
- Removed the `backup.rs` file as it is no longer needed.
- Introduced tests for configuration and credential management.
- Enhanced the `identity` module to generate W3C compliant DID documents.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

neode-ui/src/views/Dashboard.vue

@@ -110,7 +110,7 @@
               <svg class="w-5 h-5" aria-hidden="true" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                 <path v-for="(path, index) in getIconPath('chat')" :key="index" stroke-linecap="round" stroke-linejoin="round" stroke-width="2" :d="path" />
               </svg>
-              <span>Chat</span>
+              <span>AIUI</span>
             </button>
 
             <!-- Logout - styled as nav item, below Settings -->
@@ -336,7 +336,7 @@
           <svg class="w-6 h-6" fill="none" stroke="currentColor" viewBox="0 0 24 24">
             <path v-for="(path, index) in getIconPath('chat')" :key="index" stroke-linecap="round" stroke-linejoin="round" stroke-width="2" :d="path" />
           </svg>
-          <span class="text-[10px] leading-tight">Chat</span>
+          <span class="text-[10px] leading-tight">AIUI</span>
         </button>
       </div>
     </nav>