chore: add VS Code launch configuration

Update .gitignore to track .vscode/launch.json while ignoring other
VS Code settings.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

.gitignore

@@ -25,7 +25,8 @@ lib/**/*.g.dart
 *.iml
 *.ipr
 *.iws
-.vscode/
+.vscode/*
+!.vscode/launch.json
 *.swp
 *.swo
 *~

.vscode/launch.json

@@ -0,0 +1,40 @@
+{
+  "version": "0.2.0",
+  "configurations": [
+    {
+      "name": "Flutter Web (Chrome)",
+      "type": "dart",
+      "request": "launch",
+      "program": "lib/main.dart",
+      "args": [
+        "-d",
+        "chrome",
+        "--web-port=8080"
+      ]
+    },
+    {
+      "name": "Flutter Web (Chrome) - Profile",
+      "type": "dart",
+      "request": "launch",
+      "program": "lib/main.dart",
+      "flutterMode": "profile",
+      "args": [
+        "-d",
+        "chrome",
+        "--web-port=8080"
+      ]
+    },
+    {
+      "name": "Flutter Web (Chrome) - Release",
+      "type": "dart",
+      "request": "launch",
+      "program": "lib/main.dart",
+      "flutterMode": "release",
+      "args": [
+        "-d",
+        "chrome",
+        "--web-port=8080"
+      ]
+    }
+  ]
+}