Fix Input ref timing, PairEditor initialization, and environment variable focus

src-web/components/core/Input.tsx

@@ -401,7 +401,7 @@ function EncryptionInput({
           setState({ fieldType: 'encrypted', security, value, obscured: true, error: null });
           // We're calling this here because we want the input to be fully initialized so the caller
           // can do stuff like change the selection.
-          setRef?.(inputRef.current);
+          requestAnimationFrame(() => setRef?.(inputRef.current));
         },
         onError: (value) => {
           setState({

src-web/components/core/PairEditor.tsx

@@ -128,14 +128,19 @@ export function PairEditor({
 
   const initPairEditorRow = useCallback(
     (id: string, n: RowHandle | null) => {
+      const isLast = id === pairs[pairs.length - 1]?.id;
+      if (isLast) return; // Never add the last pair
+
       rowsRef.current[id] = n;
-      const ready =
-        Object.values(rowsRef.current).filter((v) => v != null).length === pairs.length - 1; // Ignore the last placeholder pair
+      const validHandles = Object.values(rowsRef.current).filter((v) => v != null);
+
+      // NOTE: Ignore the last placeholder pair
+      const ready = validHandles.length === pairs.length - 1;
       if (ready) {
         setRef?.(handle);
       }
     },
-    [handle, pairs.length, setRef],
+    [handle, pairs, setRef],
   );
 
   useEffect(() => {

src-web/lib/editEnvironment.tsx

@@ -39,6 +39,8 @@ export async function editEnvironment(
       }
     }
 
+    let didFocusVariable = false;
+
     toggleDialog({
       id: 'environment-editor',
       noPadding: true,
@@ -48,8 +50,9 @@ export async function editEnvironment(
         <EnvironmentEditDialog
           initialEnvironmentId={environment?.id ?? null}
           setRef={(pairEditor: PairEditorHandle | null) => {
-            if (focusId) {
+            if (focusId && !didFocusVariable) {
               pairEditor?.focusValue(focusId);
+              didFocusVariable = true;
             }
           }}
         />