Set opt-level=3 for dependencies in debug builds

Cargo.toml

@@ -5,3 +5,12 @@ members = [
   "srv",
   "gui",
 ]
+
+# Enable max optimizations for dependencies, but not for our code:
+# Very helpful when developing in Slint.
+[profile.dev.package."*"]
+opt-level = 3
+
+# Enable only a small amount of optimization in debug mode
+[profile.dev]
+opt-level = 1

gui/Cargo.toml

@@ -49,7 +49,6 @@ features = [
   "backend-android-activity-06",
 ]
 
-
 [target.'cfg(target_os = "linux")'.dependencies]
 tokio = { version = "1.48.0", default-features = false, features = ["fs", "rt-multi-thread"] }
 xdg = "3.0.0"