Rewrite by flutter

.gitignore

@@ -1,3 +1,43 @@
-build/bin
-node_modules
-frontend/dist
+# Miscellaneous
+*.class
+*.log
+*.pyc
+*.swp
+.DS_Store
+.atom/
+.buildlog/
+.history
+.svn/
+migrate_working_dir/
+
+# IntelliJ related
+*.iml
+*.ipr
+*.iws
+.idea/
+
+# The .vscode folder contains launch configuration and tasks you configure in
+# VS Code which you may wish to be included in version control, so this line
+# is commented out by default.
+#.vscode/
+
+# Flutter/Dart/Pub related
+**/doc/api/
+**/ios/Flutter/.last_build_id
+.dart_tool/
+.flutter-plugins
+.flutter-plugins-dependencies
+.pub-cache/
+.pub/
+/build/
+
+# Symbolication related
+app.*.symbols
+
+# Obfuscation related
+app.*.map.json
+
+# Android Studio will place build artifacts here
+/android/app/debug
+/android/app/profile
+/android/app/release

.metadata

@@ -0,0 +1,45 @@
+# This file tracks properties of this Flutter project.
+# Used by Flutter tool to assess capabilities and perform upgrades etc.
+#
+# This file should be version controlled and should not be manually edited.
+
+version:
+  revision: "41456452f29d64e8deb623a3c927524bcf9f111b"
+  channel: "stable"
+
+project_type: app
+
+# Tracks metadata for the flutter migrate command
+migration:
+  platforms:
+    - platform: root
+      create_revision: 41456452f29d64e8deb623a3c927524bcf9f111b
+      base_revision: 41456452f29d64e8deb623a3c927524bcf9f111b
+    - platform: android
+      create_revision: 41456452f29d64e8deb623a3c927524bcf9f111b
+      base_revision: 41456452f29d64e8deb623a3c927524bcf9f111b
+    - platform: ios
+      create_revision: 41456452f29d64e8deb623a3c927524bcf9f111b
+      base_revision: 41456452f29d64e8deb623a3c927524bcf9f111b
+    - platform: linux
+      create_revision: 41456452f29d64e8deb623a3c927524bcf9f111b
+      base_revision: 41456452f29d64e8deb623a3c927524bcf9f111b
+    - platform: macos
+      create_revision: 41456452f29d64e8deb623a3c927524bcf9f111b
+      base_revision: 41456452f29d64e8deb623a3c927524bcf9f111b
+    - platform: web
+      create_revision: 41456452f29d64e8deb623a3c927524bcf9f111b
+      base_revision: 41456452f29d64e8deb623a3c927524bcf9f111b
+    - platform: windows
+      create_revision: 41456452f29d64e8deb623a3c927524bcf9f111b
+      base_revision: 41456452f29d64e8deb623a3c927524bcf9f111b
+
+  # User provided section
+
+  # List of Local paths (relative to this file) that should be
+  # ignored by the migrate tool.
+  #
+  # Files that are not part of the templates will be ignored by default.
+  unmanaged_files:
+    - 'lib/main.dart'
+    - 'ios/Runner.xcodeproj/project.pbxproj'

.vscode/README.md

@@ -0,0 +1,3 @@
+# extensions
+
+`cSpell.words` is used by extension `Code Spell Checker`.

.vscode/settings.json

@@ -0,0 +1,10 @@
+{
+    "cSpell.words": [
+        "ARGB",
+        "fluttertoast",
+        "LOCALAPPDATA",
+        "POESESSID",
+        "poexport",
+        "Sess"
+    ]
+}

analysis_options.yaml

@@ -0,0 +1,28 @@
+# This file configures the analyzer, which statically analyzes Dart code to
+# check for errors, warnings, and lints.
+#
+# The issues identified by the analyzer are surfaced in the UI of Dart-enabled
+# IDEs (https://dart.dev/tools#ides-and-editors). The analyzer can also be
+# invoked from the command line by running `flutter analyze`.
+
+# The following line activates a set of recommended lints for Flutter apps,
+# packages, and plugins designed to encourage good coding practices.
+include: package:flutter_lints/flutter.yaml
+
+linter:
+  # The lint rules applied to this project can be customized in the
+  # section below to disable rules from the `package:flutter_lints/flutter.yaml`
+  # included above or to enable additional rules. A list of all available lints
+  # and their documentation is published at https://dart.dev/lints.
+  #
+  # Instead of disabling a lint rule for the entire project in the
+  # section below, it can also be suppressed for a single line of code
+  # or a specific dart file by using the `// ignore: name_of_lint` and
+  # `// ignore_for_file: name_of_lint` syntax on the line or in the file
+  # producing the lint.
+  rules:
+    # avoid_print: false  # Uncomment to disable the `avoid_print` rule
+    # prefer_single_quotes: true  # Uncomment to enable the `prefer_single_quotes` rule
+
+# Additional information about this file can be found at
+# https://dart.dev/guides/language/analysis-options