feat(Index.tsx): add user prompt setting for AI tag generation

src/pages/Index.tsx

@@ -116,11 +116,10 @@ Focus on:
 
 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.
+Keep tags concise, use lowercase, and separate words with hyphens if needed.`);
+  const [userPrompt, setUserPrompt] = useState(`Generate tags for this journal entry:
 
-Available variables:
-- $current: The current note content
-- $previous: Previous notes with dates, separated by "--------------------"`);
+$current`);
   const [contextSize, setContextSize] = useState(3);
 
   const { resolvedTheme, setTheme } = useTheme();
@@ -313,19 +312,17 @@ Available variables:
   // Generate tags using Ollama
   const generateTags = async (content: string, noteIndex?: number): Promise<string[]> => {
     try {
-            // Get context from surrounding notes
+            // Get context from previous notes only
       let previousNotes = '';
       if (noteIndex !== undefined && noteCache.length > 0) {
         const contextNotes = [];
         const start = Math.max(0, noteIndex - contextSize);
-        const end = Math.min(noteCache.length, noteIndex + contextSize + 1);
+        const end = noteIndex; // Only previous notes, not future ones
 
         for (let i = start; i < end; i++) {
-          if (i !== noteIndex) {
-            const note = noteCache[i];
-            const date = new Date(note.epochTime).toLocaleDateString();
-            contextNotes.push(`[${date}] ${note.content}`);
-          }
+          const note = noteCache[i];
+          const date = new Date(note.epochTime).toLocaleDateString();
+          contextNotes.push(`[${date}] ${note.content}`);
         }
 
         if (contextNotes.length > 0) {
@@ -333,15 +330,11 @@ Available variables:
         }
       }
 
-      // Replace variables in system prompt
-      let processedSystemPrompt = systemPrompt
+      // Replace variables in user prompt only (system prompt should be instructions, not content)
+      let processedUserPrompt = userPrompt
         .replace(/\$current/g, content)
         .replace(/\$previous/g, previousNotes);
 
-      const userPrompt = `Generate tags for this journal entry:
-
-${content}`;
-
       const response = await fetchWithTiming(`${ollamaEndpoint}/api/generate`, {
         method: 'POST',
         headers: {
@@ -349,8 +342,8 @@ ${content}`;
         },
         body: JSON.stringify({
           model: ollamaModel,
-          system: processedSystemPrompt,
-          prompt: userPrompt,
+          system: systemPrompt,
+          prompt: processedUserPrompt,
           stream: false,
           keep_alive: ollamaKeepAlive,
           temperature: ollamaTemperature,
@@ -1549,6 +1542,7 @@ ${content}`;
         await loadFontSizeSetting();
         await loadAutoGenerateTagsSetting();
         await loadSystemPromptSetting();
+        await loadUserPromptSetting();
         await loadContextSizeSetting();
         await loadIncludeTagsSetting();
         await loadAllOllamaSettings();
@@ -1670,6 +1664,33 @@ ${content}`;
     }
   };
 
+  // Load user prompt setting
+  const loadUserPromptSetting = async () => {
+    try {
+      const response = await fetchWithTiming(`${MEILISEARCH_ENDPOINT}/indexes/${SETTINGS_INDEX}/search`, {
+        method: 'POST',
+        headers: {
+          'Content-Type': 'application/json',
+          'Authorization': `Bearer ${MEILISEARCH_API_KEY}`,
+        },
+        body: JSON.stringify({
+          q: 'userPrompt',
+          filter: 'key = "userPrompt"',
+          limit: 1,
+        }),
+      }, 'Load User Prompt Setting');
+
+      if (response.ok) {
+        const data = await response.json();
+        if (data.hits.length > 0) {
+          setUserPrompt(data.hits[0].value);
+        }
+      }
+    } catch (error) {
+      console.error('Error loading user prompt setting:', error);
+    }
+  };
+
   // Load context size setting
   const loadContextSizeSetting = async () => {
     try {
@@ -1951,6 +1972,43 @@ ${content}`;
     }
   };
 
+  // Save user prompt setting
+  const saveUserPromptSetting = async (newPrompt: string) => {
+    try {
+      const document = {
+        key: 'userPrompt',
+        value: newPrompt,
+        updatedAt: new Date().getTime(),
+      };
+
+      const response = await fetchWithTiming(`${MEILISEARCH_ENDPOINT}/indexes/${SETTINGS_INDEX}/documents`, {
+        method: 'POST',
+        headers: {
+          'Content-Type': 'application/json',
+          'Authorization': `Bearer ${MEILISEARCH_API_KEY}`,
+        },
+        body: JSON.stringify(document),
+      }, 'Save User Prompt Setting');
+
+      if (response.status !== 202) {
+        throw new Error('Failed to save user prompt setting');
+      }
+
+      setUserPrompt(newPrompt);
+      toast({
+        title: "User prompt updated",
+        description: "User prompt has been saved.",
+      });
+    } catch (error) {
+      console.error('Error saving user prompt setting:', error);
+      toast({
+        title: "Error",
+        description: "Failed to save user prompt setting.",
+        variant: "destructive",
+      });
+    }
+  };
+
   // Save context size setting
   const saveContextSizeSetting = async (newSize: number) => {
     try {
@@ -2655,6 +2713,22 @@ ${content}`;
                     This prompt tells the AI how to generate tags for your notes
                   </p>
                 </div>
+
+                <div>
+                  <label className={`${getTextClass('xl')} font-medium mb-2 block`}>
+                    User Prompt
+                  </label>
+                  <Textarea
+                    value={userPrompt}
+                    onChange={(e) => setUserPrompt(e.target.value)}
+                    onBlur={() => saveUserPromptSetting(userPrompt)}
+                    className={`min-h-32 ${getTextClass('base')}`}
+                    placeholder="Enter the user prompt for tag generation..."
+                  />
+                  <p className={`${getTextClass('base')} text-muted-foreground mt-2`}>
+                    This prompt is sent to the AI with $current and $previous variables
+                  </p>
+                </div>
               </div>
             </div>