chore: strengthen CI pipeline and project quality standards

Add code coverage enforcement to CI (75% threshold, excluding
generated l10n files), stricter analysis_options.yaml with rules for
immutability, async safety and widget best practices, .editorconfig
for cross-editor consistency, and project metadata in pubspec.yaml.

Author: Endika

.editorconfig

@@ -0,0 +1,21 @@
+root = true
+
+[*]
+end_of_line = lf
+insert_final_newline = true
+trim_trailing_whitespace = true
+charset = utf-8
+
+[*.dart]
+indent_style = space
+indent_size = 2
+
+[*.{yaml,yml}]
+indent_style = space
+indent_size = 2
+
+[*.md]
+trim_trailing_whitespace = false
+
+[Makefile]
+indent_style = tab

.github/workflows/ci.yml

@@ -31,5 +31,14 @@ jobs:
       - name: Analyze
         run: flutter analyze
 
-      - name: Run tests
-        run: flutter test
+      - name: Run tests with coverage
+        run: flutter test --coverage
+
+      - name: Enforce coverage threshold
+        run: |
+          # Exclude generated l10n files from coverage report
+          awk 'BEGIN{s=0} /^SF:.*lib\/l10n\//{s=1} /^end_of_record/{if(s){s=0;next}} !s' coverage/lcov.info > coverage/lcov_filtered.info
+          COVERAGE=$(awk '/^LF:/{t+=substr($0,4)} /^LH:/{h+=substr($0,4)} END{if(t>0) printf "%.1f",h/t*100; else print "0"}' coverage/lcov_filtered.info)
+          echo "Coverage: ${COVERAGE}% (excluding generated l10n)"
+          THRESHOLD=75
+          awk "BEGIN{exit ($COVERAGE < $THRESHOLD) ? 1 : 0}" || { echo "::error::Coverage ${COVERAGE}% is below the ${THRESHOLD}% threshold"; exit 1; }

analysis_options.yaml

@@ -4,9 +4,25 @@ linter:
   rules:
     prefer_const_constructors: true
     prefer_const_declarations: true
+    prefer_const_literals_to_create_immutables: true
     avoid_print: true
+    prefer_final_fields: true
+    prefer_final_locals: true
+    unnecessary_this: true
+    unnecessary_late: true
+    unnecessary_nullable_for_final_variable_declarations: true
+    use_super_parameters: true
+    avoid_unnecessary_containers: true
+    sized_box_for_whitespace: true
+    sort_child_properties_last: true
+    use_build_context_synchronously: true
+    cancel_subscriptions: true
+    always_declare_return_types: true
+    unawaited_futures: true
 
 analyzer:
   errors:
     missing_required_param: error
     missing_return: error
+  exclude:
+    - "lib/l10n/app_localizations*.dart"

pubspec.yaml

@@ -2,6 +2,8 @@ name: pictotap
 description: A communication app for accessibility.
 publish_to: none
 version: 1.0.0+1
+homepage: https://endika.github.io/pictotap
+repository: https://github.com/endika/pictotap
 
 environment:
   sdk: ">=3.0.0 <4.0.0"