fix(core): LiteLoader 快照仓固定为 repo.mumfrey.com/snapshots（1.10.2 的 repo.url 是 /repo/ 形态，照它会 404）

crates/core/src/addon/loader/fabric.rs

@@ -216,15 +216,28 @@ fn lift_flat_digest(library: &mut Library) {
 }
 
 /// loader 本体库必须在列表里：缺了就补一条（并用告警说明），别装出个"没有 loader"的实例。
+///
+/// 只有 fabric 系会走到这里（调用方 [`build_release`] 的入口已按
+/// [`LoaderKind::is_fabric_family`] 分流）；这里仍然**穷尽 match**，因为过去那对 `_ =>`
+/// 会在新加一支加载器时把它静默当成 `fabric-loader` 补进库表。
 fn ensure_loader_library(
     kind: LoaderKind,
     loader_version: &str,
     libraries: &mut Vec<Library>,
     warnings: &mut Vec<String>,
 ) {
-    let (group, artifact) = match kind {
-        LoaderKind::Quilt => ("org.quiltmc", "quilt-loader"),
-        _ => ("net.fabricmc", "fabric-loader"),
+    let (group, artifact, maven_base) = match kind {
+        LoaderKind::Fabric => (
+            "net.fabricmc",
+            "fabric-loader",
+            "https://maven.fabricmc.net/",
+        ),
+        LoaderKind::Quilt => (
+            "org.quiltmc",
+            "quilt-loader",
+            "https://maven.quiltmc.org/repository/release/",
+        ),
+        LoaderKind::NeoForge | LoaderKind::Forge | LoaderKind::LiteLoader => return,
     };
     let present = libraries.iter().any(|library| {
         library
@@ -234,10 +247,6 @@ fn ensure_loader_library(
     if present {
         return;
     }
-    let maven_base = match kind {
-        LoaderKind::Quilt => "https://maven.quiltmc.org/repository/release/",
-        _ => "https://maven.fabricmc.net/",
-    };
     libraries.push(Library {
         name: format!("{group}:{artifact}:{loader_version}"),
         url: Some(maven_base.to_string()),