chore(clippy): enable and fix many stricter lints (#3783)

* chore(clippy): enable and fix many stricter lints

These ensure that the codebase uses more idiomatic, performant, and
concise language constructions.

* chore: make non-Clippy compiler warnings also deny by default

packages/app-lib/src/api/pack/import/curseforge.rs

@@ -65,8 +65,7 @@ pub async fn import_curseforge(
         "Curseforge-{}",
         curseforge_instance_folder
             .file_name()
-            .map(|a| a.to_string_lossy().to_string())
-            .unwrap_or("Unknown".to_string())
+            .map_or("Unknown".to_string(), |a| a.to_string_lossy().to_string())
     );
 
     let state = State::get().await?;

packages/app-lib/src/api/pack/import/gdlauncher.rs

@@ -52,8 +52,7 @@ pub async fn import_gdlauncher(
         "GDLauncher-{}",
         gdlauncher_instance_folder
             .file_name()
-            .map(|a| a.to_string_lossy().to_string())
-            .unwrap_or("Unknown".to_string())
+            .map_or("Unknown".to_string(), |a| a.to_string_lossy().to_string())
     );
 
     // Re-cache icon

packages/app-lib/src/api/pack/import/mmc.rs

@@ -26,6 +26,7 @@ enum MMCInstanceEnum {
 struct MMCInstanceGeneral {
     pub general: MMCInstance,
 }
+
 #[derive(Serialize, Deserialize, Debug)]
 #[serde(rename_all = "PascalCase")]
 pub struct MMCInstance {
@@ -144,9 +145,9 @@ pub async fn is_valid_mmc(instance_folder: PathBuf) -> bool {
     let instance_cfg = instance_folder.join("instance.cfg");
     let mmc_pack = instance_folder.join("mmc-pack.json");
 
-    let mmc_pack = match io::read_any_encoding_to_string(&mmc_pack).await {
-        Ok((mmc_pack, _)) => mmc_pack,
-        Err(_) => return false,
+    let Ok((mmc_pack, _)) = io::read_any_encoding_to_string(&mmc_pack).await
+    else {
+        return false;
     };
 
     load_instance_cfg(&instance_cfg).await.is_ok()
@@ -233,7 +234,7 @@ pub async fn import_mmc(
                 // Kept separate as we may in the future want to add special handling for modrinth managed packs
                 import_mmc_unmanaged(profile_path, minecraft_folder, "Imported Modrinth Modpack".to_string(), description, mmc_pack).await?;
             }
-            Some(MMCManagedPackType::Flame) | Some(MMCManagedPackType::ATLauncher) => {
+            Some(MMCManagedPackType::Flame | MMCManagedPackType::ATLauncher) => {
                 // For flame/atlauncher managed packs
                 // Treat as unmanaged, but with 'minecraft' folder instead of '.minecraft'
                 import_mmc_unmanaged(profile_path, minecraft_folder, "Imported Modpack".to_string(), description, mmc_pack).await?;

packages/app-lib/src/api/pack/install_from.rs

@@ -357,9 +357,7 @@ pub async fn set_profile_information(
         }
     }
 
-    let game_version = if let Some(game_version) = game_version {
-        game_version
-    } else {
+    let Some(game_version) = game_version else {
         return Err(crate::ErrorKind::InputError(
             "Pack did not specify Minecraft version".to_string(),
         )
@@ -393,10 +391,7 @@ pub async fn set_profile_information(
                     locked: if !ignore_lock {
                         true
                     } else {
-                        prof.linked_data
-                            .as_ref()
-                            .map(|x| x.locked)
-                            .unwrap_or(true)
+                        prof.linked_data.as_ref().is_none_or(|x| x.locked)
                     },
                 })
             }

packages/app-lib/src/api/pack/install_mrpack.rs

@@ -152,8 +152,7 @@ pub async fn install_zipped_mrpack_files(
                     if let Some(env) = project.env {
                         if env
                             .get(&EnvType::Client)
-                            .map(|x| x == &SideType::Unsupported)
-                            .unwrap_or(false)
+                            .is_some_and(|x| x == &SideType::Unsupported)
                         {
                             return Ok(());
                         }