fix: resolve TS catch clause type and useVariables race condition

Author: VariableThe

src/App.tsx

@@ -481,7 +481,7 @@ function App() {
                         )
                         handleEditorChange(errorVal)
                       })
-                  } catch (err: Error | unknown) {
+                  } catch (err: unknown) {
                     const docStr = view.state.doc.toString()
                     const errorVal = docStr.replace(
                       '\n\u200B...\u200C\n',

src/hooks/useVariables.ts

@@ -7,6 +7,7 @@ export function useVariables() {
 
   // Sync global variables whenever notes change
   useEffect(() => {
+    let abort = false
     async function syncVars() {
       const globals: Record<string, unknown> = {}
       const reVar = /^\/globvar\s+([a-zA-Z0-9_]+)\s*=\s*(.*)$/gm
@@ -27,9 +28,13 @@ export function useVariables() {
           }
         }
       }
+      if (abort) return
       ;(window as unknown as { __globalVariables: Record<string, unknown> }).__globalVariables =
         globals
     }
     syncVars()
+    return () => {
+      abort = true
+    }
   }, [notes])
 }