feat(Index.tsx): implement debounced tag generation for improved user experience

src/pages/Index.tsx

@@ -98,6 +98,7 @@ const Index = () => {
   const [autoGenerateTags, setAutoGenerateTags] = useState(true);
   const [ollamaStatus, setOllamaStatus] = useState<'unknown' | 'online' | 'offline'>('unknown');
   const [includeTagsInSearch, setIncludeTagsInSearch] = useState(true);
+  const [tagGenerationTimeout, setTagGenerationTimeout] = useState<NodeJS.Timeout>();
 
   const { resolvedTheme, setTheme } = useTheme();
 
@@ -240,12 +241,46 @@ const Index = () => {
     }
   };
 
+  // Debounced tag generation
+  const debouncedGenerateTags = (content: string, noteIndex?: number) => {
+    if (tagGenerationTimeout) {
+      clearTimeout(tagGenerationTimeout);
+    }
+    
+    const timeout = setTimeout(async () => {
+      if (content.trim() && autoGenerateTags) {
+        try {
+          addDebugInfo('Auto-generating tags...');
+          const tags = await generateTags(content, noteIndex);
+          if (noteIndex !== undefined) {
+            // For existing notes
+            const note = noteCache[noteIndex];
+            if (note) {
+              const updatedNote = { ...note, tags };
+              setPreviousNote(updatedNote);
+              setIsPreviousNoteModified(true);
+            }
+          } else {
+            // For current note
+            setCurrentNoteTags(tags);
+          }
+        } catch (error) {
+          console.error('Auto tag generation failed:', error);
+        }
+      }
+    }, 200);
+    
+    setTagGenerationTimeout(timeout);
+  };
+
   // Generate tags using Ollama
   const generateTags = async (content: string, noteIndex?: number): Promise<string[]> => {
     try {
       const systemPrompt = `You are a helpful assistant that generates searchable tags for journal entries. 
       
-Your task is to analyze the content and generate 3-8 relevant tags that would help the author find this note later. 
+Your task is to analyze the content and generate 1-3 relevant tags that would help the author find this note later. 
+Focus on the quality of tags, not the quantity.
+
 Focus on:
 - Programming languages, frameworks, libraries mentioned
 - Technical concepts and methodologies
@@ -468,7 +503,7 @@ ${content}${context}`;
       // Use current note tags or generate tags using Ollama if enabled
       let tags: string[] = currentNoteTags;
       if (autoGenerateTags && tags.length === 0) {
-        addDebugInfo('Generating tags for new note...');
+        addDebugInfo('Generating tags for new note before saving...');
         tags = await generateTags(trimmedContent, 0); // New note will be at index 0
       }
 
@@ -543,6 +578,13 @@ ${content}${context}`;
         const noteIndex = noteCache.findIndex(n => n.id === note.id);
         tags = await generateTags(trimmedContent, noteIndex);
       }
+      
+      // Generate tags if none are present and auto-generation is enabled
+      if (autoGenerateTags && tags.length === 0) {
+        addDebugInfo('No tags present, generating tags before saving...');
+        const noteIndex = noteCache.findIndex(n => n.id === note.id);
+        tags = await generateTags(trimmedContent, noteIndex);
+      }
 
       const document = {
         id: note.id,
@@ -1147,6 +1189,10 @@ ${content}${context}`;
       if (saveTimeoutRef.current) {
         clearTimeout(saveTimeoutRef.current);
       }
+      // Clear any pending tag generation timeout on cleanup
+      if (tagGenerationTimeout) {
+        clearTimeout(tagGenerationTimeout);
+      }
     };
   }, [currentNote, previousNote, scratchPad, isPreviousNoteModified, isSearchOpen, isGotoOpen, isCleanupOpen]);
 
@@ -1778,10 +1824,12 @@ ${content}${context}`;
                 <Textarea
                   value={previousNote.content}
                   onChange={(e) => {
-                    const updatedNote = { ...previousNote, content: e.target.value };
+                    const newContent = e.target.value;
+                    const updatedNote = { ...previousNote, content: newContent };
                     setPreviousNote(updatedNote);
                     setIsPreviousNoteModified(true);
-                    if (e.target.value.trim() === '') {
+                    debouncedGenerateTags(newContent, currentNoteIndex);
+                    if (newContent.trim() === '') {
                       deleteNote(previousNote.id);
                     }
                   }}
@@ -1834,7 +1882,9 @@ ${content}${context}`;
               ref={currentNoteRef}
               value={currentNote}
               onChange={(e) => {
-                setCurrentNote(e.target.value);
+                const newContent = e.target.value;
+                setCurrentNote(newContent);
+                debouncedGenerateTags(newContent);
               }}
               onBlur={handleCurrentNoteBlur}
               className={`h-[calc(100%-2rem)] border-0 resize-none focus:ring-0 bg-transparent ${getTextClass('2xl')}`}