feat(Index.tsx): refactor tag generation and display for notes to use comma-separated values and allow manual editing

src/pages/Index.tsx

@@ -73,6 +73,7 @@ const Index = () => {
   console.log(`Component mounted after ${Date.now() - GLOBAL_START_TIME}ms`);
   
   const [currentNote, setCurrentNote] = useState('');
+  const [currentNoteTags, setCurrentNoteTags] = useState<string[]>([]);
   const [previousNote, setPreviousNote] = useState<Note | null>(null);
   const [scratchPad, setScratchPad] = useState('');
   const [scratchId, setScratchId] = useState<string | null>(null);
@@ -251,7 +252,7 @@ Focus on:
 - Problem domains or contexts
 - Key technical terms that someone might search for
 
-Return ONLY a JSON array of strings, no other text. Example: ["golang", "testing", "array-comparison", "cmp-library"]
+Return ONLY a comma-separated list of tags, no other text. Example: golang, testing, array-comparison, cmp-library
 
 Keep tags concise, use lowercase, and separate words with hyphens if needed.`;
 
@@ -273,37 +274,25 @@ ${content}`;
       }, 'Generate Tags');
 
       if (!response.ok) {
-        throw new Error('Failed to generate tags');
+        const errorText = await response.text().catch(() => 'Unknown error');
+        throw new Error(`Ollama API error ${response.status}: ${errorText}`);
       }
 
       const data = await response.json();
       const responseText = data.response?.trim();
       
       if (!responseText) {
-        throw new Error('Empty response from Ollama');
+        throw new Error('Empty response from Ollama - check if model is loaded');
       }
 
-      // Try to parse JSON from the response
-      try {
-        const tags = JSON.parse(responseText);
-        if (Array.isArray(tags) && tags.every(tag => typeof tag === 'string')) {
+      // Parse CSV format from the response
+      const tags = responseText
+        .split(',')
+        .map((tag: string) => tag.trim())
+        .filter((tag: string) => tag.length > 0);
+      
       addDebugInfo(`Generated ${tags.length} tags: ${tags.join(', ')}`);
       return tags;
-        }
-      } catch (parseError) {
-        console.warn('Failed to parse tags as JSON, trying to extract from text:', responseText);
-      }
-
-      // Fallback: try to extract tags from text response
-      const tagMatch = responseText.match(/\[(.*?)\]/);
-      if (tagMatch) {
-        const tags = tagMatch[1]
-          .split(',')
-          .map((tag: string) => tag.trim().replace(/"/g, ''))
-          .filter((tag: string) => tag.length > 0);
-        addDebugInfo(`Extracted ${tags.length} tags from text: ${tags.join(', ')}`);
-        return tags;
-      }
 
       // Last resort: return empty array
       addDebugInfo('Could not extract tags from Ollama response');
@@ -311,13 +300,34 @@ ${content}`;
     } catch (error) {
       console.error('Error generating tags:', error);
       const errorMessage = error instanceof Error ? error.message : 'Unknown error';
-      addDebugInfo(`Tag generation failed: ${errorMessage}`);
       
-      // Check if it's a connection error
-      if (errorMessage.includes('fetch') || errorMessage.includes('network') || errorMessage.includes('ECONNREFUSED')) {
-        addDebugInfo('Ollama appears to be offline. Please ensure Ollama is running on localhost:11434');
+      // More detailed error logging and user notification
+      let userMessage = 'Failed to generate tags';
+      
+      if (error instanceof TypeError && error.message.includes('fetch')) {
+        addDebugInfo('Tag generation failed: Network error - Ollama not reachable at localhost:11434');
+        userMessage = 'Ollama not reachable - check if it\'s running on localhost:11434';
+      } else if (errorMessage.includes('Failed to fetch')) {
+        addDebugInfo('Tag generation failed: Ollama connection refused - check if Ollama is running');
+        userMessage = 'Ollama connection refused - check if Ollama is running';
+      } else if (errorMessage.includes('404')) {
+        addDebugInfo('Tag generation failed: Ollama endpoint not found - check model name');
+        userMessage = 'Model not found - check if llama3.2:3b is installed';
+      } else if (errorMessage.includes('500')) {
+        addDebugInfo('Tag generation failed: Ollama server error - check model is loaded');
+        userMessage = 'Ollama server error - check if model is loaded';
+      } else {
+        addDebugInfo(`Tag generation failed: ${errorMessage}`);
+        userMessage = `Tag generation failed: ${errorMessage}`;
       }
       
+      // Show error to user
+      toast({
+        title: "Tag Generation Failed",
+        description: userMessage,
+        variant: "destructive",
+      });
+      
       return [];
     }
   };
@@ -434,9 +444,9 @@ ${content}`;
       const { mostFrequentLetter, mostFrequentLetterFrequency, letterCount } = calculateLetterFrequency(trimmedContent);
       const now = new Date();
 
-      // Generate tags using Ollama if enabled
-      let tags: string[] = [];
-      if (autoGenerateTags) {
+      // 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...');
         tags = await generateTags(trimmedContent);
       }
@@ -480,6 +490,7 @@ ${content}`;
       setNoteCache(prev => [newNote, ...prev]);
       setPreviousNote(newNote);
       setCurrentNoteIndex(0);
+      setCurrentNoteTags([]);
 
       toast({
         title: "Note saved",
@@ -1696,12 +1707,26 @@ ${content}`;
             ref={previousNoteRef}
             className="flex-1 bg-card rounded-lg border border-border shadow-sm p-6 overflow-auto cursor-pointer select-none"
           >
-            <div className={`${getTextClass('2xl')} text-muted-foreground mb-3 flex justify-between items-center`}>
+            <div className={`${getTextClass('2xl')} text-muted-foreground mb-3 flex items-center gap-4`}>
               <div>
                 Previous Entry {currentNoteIndex > 0 && `(${currentNoteIndex + 1} of ${noteCache.length})`}
                 <span className={`ml-2 ${getTextClass('xl')} text-muted-foreground`}>Scroll to navigate</span>
               </div>
-              {previousNote && !autoGenerateTags && (
+              {previousNote && (
+                <div className="flex-1 flex items-center gap-2">
+                  <span className={`${getTextClass('base')} text-muted-foreground`}>Tags:</span>
+                  <input
+                    type="text"
+                    value={(previousNote.tags || []).join(', ')}
+                    onChange={(e) => {
+                      const tags = e.target.value.split(',').map(tag => tag.trim()).filter(tag => tag.length > 0);
+                      const updatedNote = { ...previousNote, tags };
+                      setPreviousNote(updatedNote);
+                      setIsPreviousNoteModified(true);
+                    }}
+                    className={`flex-1 border-0 bg-transparent ${getTextClass('base')} p-0 outline-none`}
+                  />
+                  {!autoGenerateTags && (
                     <Button
                       onClick={async () => {
                         if (previousNote) {
@@ -1714,26 +1739,19 @@ ${content}`;
                       }}
                       size="sm"
                       variant="outline"
-                  className={`${getTextClass('base')} px-2 py-1`}
+                      className={`${getTextClass('base')} px-2 py-1 h-6`}
                     >
-                  Generate Tags
+                      AI
                     </Button>
                   )}
                 </div>
+              )}
+            </div>
             {previousNote ? (
               <div className="space-y-4 h-[calc(100%-2rem)]">
                 <div className={`${getTextClass('xl')} text-muted-foreground`}>
                   {formatDate(previousNote.epochTime)}
                 </div>
-                {previousNote.tags && previousNote.tags.length > 0 && (
-                  <div className="flex flex-wrap gap-2">
-                    {previousNote.tags.map((tag, index) => (
-                      <Badge key={index} variant="secondary" className={`${getTextClass('base')} px-2 py-1`}>
-                        {tag}
-                      </Badge>
-                    ))}
-                  </div>
-                )}
                 <Textarea
                   value={previousNote.content}
                   onChange={(e) => {
@@ -1745,7 +1763,7 @@ ${content}`;
                     }
                   }}
                   onBlur={handlePreviousNoteBlur}
-                  className={`h-[calc(100%-${previousNote.tags && previousNote.tags.length > 0 ? '6rem' : '3rem'})] border-0 resize-none focus:ring-0 bg-transparent ${getTextClass('2xl')}`}
+                  className={`h-[calc(100%-3rem)] border-0 resize-none focus:ring-0 bg-transparent ${getTextClass('2xl')}`}
                   placeholder="Previous entry content..."
                 />
               </div>
@@ -1758,7 +1776,37 @@ ${content}`;
 
           {/* Current Note - Bottom Half */}
           <div className="flex-1 bg-card rounded-lg border border-border shadow-sm p-6 overflow-hidden">
-            <div className={`${getTextClass('2xl')} text-muted-foreground mb-3`}>Current Entry</div>
+            <div className={`${getTextClass('2xl')} text-muted-foreground mb-3 flex items-center gap-4`}>
+              <div>Current Entry</div>
+              <div className="flex-1 flex items-center gap-2">
+                <span className={`${getTextClass('base')} text-muted-foreground`}>Tags:</span>
+                <input
+                  type="text"
+                  value={currentNoteTags.join(', ')}
+                  onChange={(e) => {
+                    const tags = e.target.value.split(',').map(tag => tag.trim()).filter(tag => tag.length > 0);
+                    setCurrentNoteTags(tags);
+                  }}
+                  className={`flex-1 border-0 bg-transparent ${getTextClass('base')} p-0 outline-none`}
+                />
+                {!autoGenerateTags && (
+                  <Button
+                    onClick={async () => {
+                      if (currentNote.trim()) {
+                        addDebugInfo('Manually generating tags for current note...');
+                        const tags = await generateTags(currentNote);
+                        setCurrentNoteTags(tags);
+                      }
+                    }}
+                    size="sm"
+                    variant="outline"
+                    className={`${getTextClass('base')} px-2 py-1 h-6`}
+                  >
+                    AI
+                  </Button>
+                )}
+              </div>
+            </div>
             <Textarea
               ref={currentNoteRef}
               value={currentNote}
@@ -1812,12 +1860,8 @@ ${content}`;
                       {formatDate(note.epochTime)}
                     </div>
                     {note.tags && note.tags.length > 0 && (
-                      <div className="flex flex-wrap gap-2 mb-3">
-                        {note.tags.map((tag, index) => (
-                          <Badge key={index} variant="secondary" className={`${getTextClass('base')} px-2 py-1`}>
-                            {tag}
-                          </Badge>
-                        ))}
+                      <div className={`${getTextClass('base')} text-muted-foreground mb-3`}>
+                        Tags: {note.tags.join(', ')}
                       </div>
                     )}
                     <div