Set app version to 1.0.0+3; share sheet and markdown viewer polish; remove demo screenshot tooling

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

pubspec.lock

@@ -254,11 +254,6 @@ packages:
     description: flutter
     source: sdk
     version: "0.0.0"
-  flutter_driver:
-    dependency: transitive
-    description: flutter
-    source: sdk
-    version: "0.0.0"
   flutter_lints:
     dependency: "direct dev"
     description:
@@ -267,6 +262,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "6.0.0"
+  flutter_markdown_plus:
+    dependency: "direct main"
+    description:
+      name: flutter_markdown_plus
+      sha256: fce641d6c2106cc495de1cd603f97a4f9d615a97a64011928ded380dbdade935
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.0.12"
   flutter_plugin_android_lifecycle:
     dependency: transitive
     description:
@@ -333,11 +336,6 @@ packages:
     description: flutter
     source: sdk
     version: "0.0.0"
-  fuchsia_remote_debug_protocol:
-    dependency: transitive
-    description: flutter
-    source: sdk
-    version: "0.0.0"
   google_fonts:
     dependency: "direct main"
     description:
@@ -378,11 +376,6 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "4.1.2"
-  integration_test:
-    dependency: "direct dev"
-    description: flutter
-    source: sdk
-    version: "0.0.0"
   intl:
     dependency: "direct main"
     description:
@@ -503,6 +496,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "3.1.20"
+  markdown:
+    dependency: transitive
+    description:
+      name: markdown
+      sha256: ee85086ad7698b42522c6ad42fe195f1b9898e4d974a1af4576c1a3a176cada9
+      url: "https://pub.dev"
+    source: hosted
+    version: "7.3.1"
   marquee:
     dependency: "direct main"
     description:
@@ -791,14 +792,6 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "2.1.8"
-  process:
-    dependency: transitive
-    description:
-      name: process
-      sha256: "4242ba3508d37e01808bdf71ad1d5bb93a8d671bf2e7450e6b1b353fb0808891"
-      url: "https://pub.dev"
-    source: hosted
-    version: "5.0.6"
   provider:
     dependency: "direct main"
     description:
@@ -932,14 +925,6 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.4.1"
-  sync_http:
-    dependency: transitive
-    description:
-      name: sync_http
-      sha256: "7f0cd72eca000d2e026bcd6f990b81d0ca06022ef4e32fb257b30d3d1014a961"
-      url: "https://pub.dev"
-    source: hosted
-    version: "0.3.1"
   synchronized:
     dependency: transitive
     description:
@@ -1084,14 +1069,6 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.1.1"
-  webdriver:
-    dependency: transitive
-    description:
-      name: webdriver
-      sha256: "28b82ec894fed45dd71c23ba62d1af973ed97dd59a4f5790a4d38b0b13e5657e"
-      url: "https://pub.dev"
-    source: hosted
-    version: "3.2.0"
   webview_flutter:
     dependency: "direct main"
     description: