fix: uses struct discriminates as hash key for native tools (#2470)

Author: dingfeli

crates/chat-cli/src/cli/chat/cli/tools.rs

@@ -63,7 +63,7 @@ impl ToolsArgs {
                 session
                     .conversation
                     .tools
-                    .get("native")
+                    .get(&ToolOrigin::Native)
                     .and_then(|tools| {
                         tools
                             .iter()
@@ -221,7 +221,7 @@ impl ToolsSubcommand {
         let native_tool_names = session
             .conversation
             .tools
-            .get("native")
+            .get(&ToolOrigin::Native)
             .map(|tools| {
                 tools
                     .iter()

crates/chat-cli/src/cli/chat/tools/mod.rs

@@ -169,8 +169,9 @@ pub enum ToolOrigin {
 
 impl std::hash::Hash for ToolOrigin {
     fn hash<H: std::hash::Hasher>(&self, state: &mut H) {
+        std::mem::discriminant(self).hash(state);
         match self {
-            Self::Native => "native".hash(state),
+            Self::Native => {},
             Self::McpServer(name) => name.hash(state),
         }
     }