✨ feat: Handle exceptions and null returns in polyfills and hooks

This update introduces proper error handling and null returns in the polyfill
functions for SpeechRecognition, SpeechSynthesis, and SpeechSynthesisUtterance
to prevent silent failures. Additionally, the useBlobUrl hook now logs an error
if audio playback fails, improving the debugging process. The splitTextIntoSegments
utility function has been updated to use String.fromCodePoint for better character
encoding handling and to fix a regular expression for sentence splitting.

src/core/const/polyfill.ts

@@ -5,7 +5,9 @@ const getSpeechRecognition = () => {
       (window as any)?.SpeechRecognition ||
       (window as any)?.webkitSpeechRecognition
     );
-  } catch {}
+  } catch {
+    return null;
+  }
 };
 
 const getSpeechSynthesis = () => {
@@ -15,7 +17,9 @@ const getSpeechSynthesis = () => {
       (window as any)?.speechSynthesis ||
       (window as any)?.webkitSpeechSynthesis
     );
-  } catch {}
+  } catch {
+    return null;
+  }
 };
 
 const getSpeechSynthesisUtterance = () => {
@@ -25,7 +29,9 @@ const getSpeechSynthesisUtterance = () => {
       (window as any)?.SpeechSynthesisUtterance ||
       (window as any)?.webkitSpeechSynthesisUtterance
     );
-  } catch {}
+  } catch {
+    return null;
+  }
 };
 export const SpeechRecognition = getSpeechRecognition();
 export const SpeechSynthesis = getSpeechSynthesis();

src/core/utils/splitTextIntoSegments.ts

@@ -1,6 +1,7 @@
 const toHalfWidthAndCleanSpace = (str: string): string => {
+  // prettier-ignore
   return str
-    .replaceAll(/[\uFF01-\uFF5E]/g, (ch) => String.fromCharCode(ch.charCodeAt(0) - 0xFE_E0))
+    .replaceAll(/[\uFF01-\uFF5E]/g, (ch) => String.fromCodePoint(ch.codePointAt(0)! - 0xFE_E0))
     .replaceAll('\u3000', ' ')
     .replaceAll('。', '.')
     .replaceAll('，', ',')
@@ -25,7 +26,7 @@ const toHalfWidthAndCleanSpace = (str: string): string => {
 export const splitTextIntoSegments = (text: string, maxChars: number = 100): string[] => {
   text = toHalfWidthAndCleanSpace(text);
 
-  const sentences = text.match(/[^.!;?]+[.!;?]+/g) || [];
+  const sentences = text.match(/[^!.;?]+[!.;?]+/g) || [];
   const segments: string[] = [];
   let currentSegment = '';
 

src/react/hooks/useBlobUrl.ts

@@ -30,7 +30,9 @@ export const useBlobUrl = (src: string) => {
           const newAudio = playAudioBlob(blob);
           setUrl(newAudio.url);
           setAudio(newAudio.audio);
-        } catch {}
+        } catch {
+          console.error('Failed to play audio');
+        }
         setIsGlobalLoading(false);
       },
     },