fix(ios): typing attributes clearing on keystrokes (#773)

# Summary

There was a bug when in some cases, between selection change and a
keystroke, the typing attributes would get cleared, resulting in
unstyled text. More info in the `Screenshots / Videos` section.

All iOS e2e tests pass.

## Test Plan

Reproduce the flow from the attached videos, it should be fine now.

## Screenshots / Videos

Before:

When changing the selection programmatically, via arrow keys, the typing
attributes are correctly preserved


https://github.com/user-attachments/assets/12cba319-1dd9-4cf0-8d05-8aa5b96228a7

When using screen taps though, the typing attributes are not preserved
resulting in the unstyled text, even though (in this case bold) was
marked as active


https://github.com/user-attachments/assets/3cbb75e0-0f0d-4c85-82bc-94424899979f

After:

Typing attributes are correctly preserved whatever the selection change
method


https://github.com/user-attachments/assets/7f18e399-10ac-4910-9b50-ab2f70f2e912

## Compatibility

| OS      | Implemented |
| ------- | :---------: |
| iOS     |    ✅     |
| Android |    ❌     |
| Web     |    ❌     |

## Checklist

- [ ] E2E tests are passing
- [ ] Required E2E tests have been added (if applicable)

---------

Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>

Author: hejsztynx

.maestro/enrichedInput/flows/preserve_typing_attributes_on_selection_change.yaml

@@ -0,0 +1,34 @@
+appId: swmansion.enriched.example
+---
+# Verifies that typing attributes are properly preserved on selection changes
+- launchApp
+
+- tapOn:
+    id: 'toggle-screen-button'
+
+- tapOn:
+    id: "editor-input"
+
+- tapOn:
+    id: "toolbar-bold"
+
+- inputText: 'bold text'
+- pressKey: Enter
+- pressKey: Enter
+- pressKey: Enter
+- inputText: 'another line'
+
+- doubleTapOn:
+    id: 'editor-input'
+    point: '20%, 75%'
+
+- tapOn:
+    id: 'editor-input'
+    point: '50%, 15%'
+
+- inputText: 'new'
+
+- runFlow:
+    file: '../subflows/capture_or_assert_screenshot.yaml'
+    env:
+      SCREENSHOT_NAME: 'preserve_typing_attributes_on_selection_changes'

.maestro/enrichedInput/screenshots/android/preserve_typing_attributes_on_selection_changes.png

@@ -2000,6 +2000,14 @@ - (bool)textView:(UITextView *)textView
     return NO;
   }
 
+  // To be sure, we re-run typingAttributes management right before the
+  // character actually lands. Sometimes, between a selection change and the
+  // next keystroke, typing attributes might get removed - this seems like a
+  // native TextKit issue.
+  if (textView.markedTextRange == nil && text.length > 0) {
+    [attributesManager repeatRecentTypingAttributesManagement];
+  }
+
   return YES;
 }
 

.maestro/enrichedInput/screenshots/ios/preserve_typing_attributes_on_selection_changes.png

@@ -13,6 +13,7 @@
 - (void)didRemoveTypingAttribute:(NSString *)key;
 - (void)clearRemovedTypingAttributes;
 - (void)manageTypingAttributesWithOnlySelection:(BOOL)onlySelectionChanged;
+- (void)repeatRecentTypingAttributesManagement;
 - (void)handleDirtyRangesStyling;
 - (NSSet<NSString *> *)customAttributesKeys;
 @end

ios/EnrichedTextInputView.mm

@@ -11,13 +11,15 @@ @implementation InputAttributesManager {
   NSMutableArray<NSValue *> *_dirtyRanges;
   NSSet *_customAttributesKeys;
   NSMutableSet *_removedTypingAttributes;
+  BOOL _recentOnlySelectionStatus;
 }
 
 - (instancetype)initWithInput:(EnrichedTextInputView *)input {
   self = [super init];
   _input = input;
   _dirtyRanges = [[NSMutableArray alloc] init];
   _removedTypingAttributes = [[NSMutableSet alloc] init];
+  _recentOnlySelectionStatus = NO;
 
   // setup customAttributes
   NSMutableSet *_customAttrsSet = [[NSMutableSet alloc] init];
@@ -129,6 +131,7 @@ - (void)handleDirtyRangesStyling {
 }
 
 - (void)manageTypingAttributesWithOnlySelection:(BOOL)onlySelectionChanged {
+  _recentOnlySelectionStatus = onlySelectionChanged;
   EnrichedInputTextView *textView = _input->textView;
   NSRange selectedRange = textView.selectedRange;
 
@@ -219,4 +222,8 @@ - (void)manageTypingAttributesWithOnlySelection:(BOOL)onlySelectionChanged {
   textView.typingAttributes = newAttrs;
 }
 
+- (void)repeatRecentTypingAttributesManagement {
+  [self manageTypingAttributesWithOnlySelection:_recentOnlySelectionStatus];
+}
+
 @end