fix: correct type mismatch in max_buffer_size handling

Co-authored-by: aider (openai/andrew/openrouter/qwen/qwen3-coder) <aider@aider.chat>

src/meta_plugin/magic.rs

@@ -165,7 +165,7 @@ impl MetaPlugin for MagicFileMetaPlugin {
         }
         
         if let Some(max_buffer_size) = options.get("max_buffer_size") {
-            if let Ok(size) = max_buffer_size.as_u64() {
+            if let Some(size) = max_buffer_size.as_u64() {
                 self.max_buffer_size = size as usize;
             }
         }

src/meta_plugin/system.rs

@@ -6,7 +6,6 @@ use std::env;
 use std::process;
 use uzers::{get_current_uid, get_current_gid, get_current_username, get_current_groupname};
 use rusqlite::Connection;
-use std::io;
 
 use crate::common::is_binary::is_binary;
 use crate::meta_plugin::MetaPlugin;
@@ -95,7 +94,7 @@ impl MetaPlugin for BinaryMetaPlugin {
     
     fn configure(&mut self, options: &std::collections::HashMap<String, serde_yaml::Value>) -> Result<()> {
         if let Some(max_buffer_size) = options.get("max_buffer_size") {
-            if let Ok(size) = max_buffer_size.as_u64() {
+            if let Some(size) = max_buffer_size.as_u64() {
                 self.max_buffer_size = size as usize;
             }
         }