feat: integrate link handling in chat screen with linkify support

- Added flutter_linkify package to auto-detect and linkify URLs in chat messages.
- Implemented LinkHandler class to manage link tap confirmations and URL launching.
- Updated chat_screen.dart to use Linkify for displaying message text with links.
- Registered url_launcher plugin for handling URL launches across platforms.
- Updated pubspec.yaml and pubspec.lock to include new dependencies.
- Cleaned up untranslated.json by removing unused translations.

pubspec.lock

@@ -262,6 +262,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "0.13.1"
+  flutter_linkify:
+    dependency: "direct main"
+    description:
+      name: flutter_linkify
+      sha256: "74669e06a8f358fee4512b4320c0b80e51cffc496607931de68d28f099254073"
+      url: "https://pub.dev"
+    source: hosted
+    version: "6.0.0"
   flutter_lints:
     dependency: "direct dev"
     description:
@@ -397,6 +405,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "3.0.2"
+  linkify:
+    dependency: transitive
+    description:
+      name: linkify
+      sha256: "4139ea77f4651ab9c315b577da2dd108d9aa0bd84b5d03d33323f1970c645832"
+      url: "https://pub.dev"
+    source: hosted
+    version: "5.0.0"
   lints:
     dependency: transitive
     description:
@@ -818,6 +834,70 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "0.3.1"
+  url_launcher:
+    dependency: "direct main"
+    description:
+      name: url_launcher
+      sha256: f6a7e5c4835bb4e3026a04793a4199ca2d14c739ec378fdfe23fc8075d0439f8
+      url: "https://pub.dev"
+    source: hosted
+    version: "6.3.2"
+  url_launcher_android:
+    dependency: transitive
+    description:
+      name: url_launcher_android
+      sha256: "767344bf3063897b5cf0db830e94f904528e6dd50a6dfaf839f0abf509009611"
+      url: "https://pub.dev"
+    source: hosted
+    version: "6.3.28"
+  url_launcher_ios:
+    dependency: transitive
+    description:
+      name: url_launcher_ios
+      sha256: cfde38aa257dae62ffe79c87fab20165dfdf6988c1d31b58ebf59b9106062aad
+      url: "https://pub.dev"
+    source: hosted
+    version: "6.3.6"
+  url_launcher_linux:
+    dependency: transitive
+    description:
+      name: url_launcher_linux
+      sha256: d5e14138b3bc193a0f63c10a53c94b91d399df0512b1f29b94a043db7482384a
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.2.2"
+  url_launcher_macos:
+    dependency: transitive
+    description:
+      name: url_launcher_macos
+      sha256: "368adf46f71ad3c21b8f06614adb38346f193f3a59ba8fe9a2fd74133070ba18"
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.2.5"
+  url_launcher_platform_interface:
+    dependency: transitive
+    description:
+      name: url_launcher_platform_interface
+      sha256: "552f8a1e663569be95a8190206a38187b531910283c3e982193e4f2733f01029"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.3.2"
+  url_launcher_web:
+    dependency: transitive
+    description:
+      name: url_launcher_web
+      sha256: d0412fcf4c6b31ecfdb7762359b7206ffba3bbffd396c6d9f9c4616ece476c1f
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.4.2"
+  url_launcher_windows:
+    dependency: transitive
+    description:
+      name: url_launcher_windows
+      sha256: "712c70ab1b99744ff066053cbe3e80c73332b38d46e5e945c98689b2e66fc15f"
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.1.5"
   uuid:
     dependency: "direct main"
     description:
@@ -907,5 +987,5 @@ packages:
     source: hosted
     version: "3.1.3"
 sdks:
-  dart: ">=3.9.2 <4.0.0"
-  flutter: ">=3.35.0"
+  dart: ">=3.10.0 <4.0.0"
+  flutter: ">=3.38.0"