feat: implement mobile UI, Android build configuration, and share intent handling using share_handler

pubspec.lock

@@ -744,14 +744,6 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "2.2.0"
-  receive_sharing_intent:
-    dependency: "direct main"
-    description:
-      name: receive_sharing_intent
-      sha256: ec76056e4d258ad708e76d85591d933678625318e411564dcb9059048ca3a593
-      url: "https://pub.dev"
-    source: hosted
-    version: "1.8.1"
   record_use:
     dependency: transitive
     description:
@@ -776,6 +768,38 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "2.0.3"
+  share_handler:
+    dependency: "direct main"
+    description:
+      name: share_handler
+      sha256: "0a6d007f0e44fbee27164adcd159ecbc88238864313f4e5c58161cae2180328d"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.0.25"
+  share_handler_android:
+    dependency: transitive
+    description:
+      name: share_handler_android
+      sha256: caf555b933dc72783aa37fef75688c7b86bd6f7bc17d80fbf585bc42f123cc8d
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.0.11"
+  share_handler_ios:
+    dependency: transitive
+    description:
+      name: share_handler_ios
+      sha256: cdc21f88f336a944157a8e9ceb191525cee3b082d6eb6c2082488e4f09dc3ece
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.0.15"
+  share_handler_platform_interface:
+    dependency: transitive
+    description:
+      name: share_handler_platform_interface
+      sha256: "7a4df95a87b326b2f07458d937f2281874567c364b7b7ebe4e7d50efaae5f106"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.0.6"
   shared_preferences:
     dependency: "direct main"
     description: