fix(ios): synced newline typing attributes with actual textStorage attributes (#775)

# Summary

Managing typing attributes was implemented in such way that when you
moved the cursor to an empty line, the typing attributes got reset. This
was to prevent picking up the style from the previous line, but it was
done unconditionally. That caused the typingAttributes to be reset even
though a style is already present in the newline and valid.

## Test Plan

Experiment around, follow the test flow from the attached videos

## Screenshots / Videos

Before:


https://github.com/user-attachments/assets/e0670f31-abf8-4953-b9e9-c97f7f50c1ef

After:


https://github.com/user-attachments/assets/2f9df226-4f90-451e-a611-4b501df50697

## Compatibility

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

## Checklist

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

Author: hejsztynx

ios/inputAttributesManager/InputAttributesManager.mm

@@ -130,6 +130,22 @@ - (void)handleDirtyRangesStyling {
   [_dirtyRanges removeAllObjects];
 }
 
+- (void)restoreInlineStylesPresentInRange:(NSRange)range
+                                intoAttrs:(NSMutableDictionary *)attrs {
+  for (StyleBase *style in _input->stylesDict.allValues) {
+    if ([style isParagraph])
+      continue;
+    if ([_removedTypingAttributes containsObject:[style getKey]])
+      continue;
+
+    AttributeEntry *entry = [style getEntryIfPresent:range];
+    if (entry == nullptr)
+      continue;
+
+    attrs[entry.key] = entry.value;
+  }
+}
+
 - (void)manageTypingAttributesWithOnlySelection:(BOOL)onlySelectionChanged {
   _recentOnlySelectionStatus = onlySelectionChanged;
   EnrichedInputTextView *textView = _input->textView;
@@ -155,6 +171,16 @@ - (void)manageTypingAttributesWithOnlySelection:(BOOL)onlySelectionChanged {
 
       [ParagraphAttributesUtils resetTypingAttributes:_input
                                   preservingAlignment:savedAlignment];
+
+      // newlines could have been made within a valid inline style, so
+      // we want to preserve typingAttributes so they are correctly
+      // acknowledged when typing
+      if (paragraphRange.length == 1) {
+        NSMutableDictionary *newAttrs = [textView.typingAttributes mutableCopy];
+        [self restoreInlineStylesPresentInRange:paragraphRange
+                                      intoAttrs:newAttrs];
+        textView.typingAttributes = newAttrs;
+      }
       return;
     }
   }
@@ -191,23 +217,10 @@ - (void)manageTypingAttributesWithOnlySelection:(BOOL)onlySelectionChanged {
   // getEntryIfPresent properly returns nullptr for styles that we don't want to
   // extend this way. Attributes from _removedTypingAttributes aren't added
   // because they were just removed.
-  for (StyleBase *style in _input->stylesDict.allValues) {
-    if ([style isParagraph])
-      continue;
-    if ([_removedTypingAttributes containsObject:[style getKey]])
-      continue;
-
-    AttributeEntry *entry = nullptr;
-
-    if (selectedRange.location > 0) {
-      entry =
-          [style getEntryIfPresent:NSMakeRange(selectedRange.location - 1, 1)];
-    }
-
-    if (entry == nullptr)
-      continue;
-
-    newAttrs[entry.key] = entry.value;
+  if (selectedRange.location > 0) {
+    [self restoreInlineStylesPresentInRange:NSMakeRange(
+                                                selectedRange.location - 1, 1)
+                                  intoAttrs:newAttrs];
   }
 
   // Apply active styles to typing attributes only for styles that require it so