feat(mcp): add automatic key normalization for server entries

- Add normalize_server_keys() to ensure MCP server map keys match internal id fields
- Auto-normalize on all read/write operations (get, upsert, delete, import, sync)
- Handle edge cases: empty/whitespace ids, key renaming, conflict resolution
- Auto-save config when normalization detects changes
- Apply cargo fmt for code formatting consistency

This enhancement improves data integrity by automatically fixing inconsistencies
between server entry keys and their id fields, especially after manual config edits.

src-tauri/src/claude_plugin.rs

@@ -63,9 +63,15 @@ pub fn write_claude_config() -> Result<bool, String> {
 
     let mut changed = false;
     if let Some(map) = obj.as_object_mut() {
-        let cur = map.get("primaryApiKey").and_then(|v| v.as_str()).unwrap_or("");
+        let cur = map
+            .get("primaryApiKey")
+            .and_then(|v| v.as_str())
+            .unwrap_or("");
         if cur != "any" {
-            map.insert("primaryApiKey".to_string(), serde_json::Value::String("any".to_string()));
+            map.insert(
+                "primaryApiKey".to_string(),
+                serde_json::Value::String("any".to_string()),
+            );
             changed = true;
         }
     }