Add AI feature images to generated posts

app/controllers/AdminController.asp

@@ -207,9 +207,9 @@ Class AdminController_Class
         End If
         On Error GoTo 0
 
-        Dim generatedSummary, generatedBody
+        Dim generatedSummary, generatedBody, generatedImagePrompt, generatedImageHtml
         On Error Resume Next
-        GeneratePostContentFromAI post, generatedSummary, generatedBody
+        GeneratePostContentFromAI post, generatedSummary, generatedBody, generatedImagePrompt
         If Err.Number <> 0 Then
             Flash().AddError "AI content generation failed: " & Err.Description
             Err.Clear
@@ -225,8 +225,10 @@ Class AdminController_Class
             Exit Sub
         End If
 
+        generatedImageHtml = BuildGeneratedImageHtml(generatedImagePrompt, post.Title, generatedSummary)
+
         post.Summary = generatedSummary
-        post.Body = generatedBody
+        post.Body = generatedImageHtml & generatedBody
         post.UpdatedDate = Now()
 
         PostsRepository().Update post
@@ -234,7 +236,7 @@ Class AdminController_Class
         Response.Redirect PostEditUrl(post.PostID)
     End Sub
 
-    Private Sub GeneratePostContentFromAI(ByRef post, ByRef generatedSummary, ByRef generatedBody)
+    Private Sub GeneratePostContentFromAI(ByRef post, ByRef generatedSummary, ByRef generatedBody, ByRef generatedImagePrompt)
         Dim apiKey : apiKey = Trim(CStr(GetSecureSetting("AbacusApiKey", "ABACUS_API_KEY")))
         If Len(apiKey) = 0 Then
             Err.Raise 1, "AdminController.GeneratePostContentFromAI", "Abacus API key is not configured."
@@ -248,9 +250,10 @@ Class AdminController_Class
         If Len(modelName) = 0 Or LCase(modelName) = "nothing" Then modelName = "route-llm"
 
         Dim systemPrompt, userPrompt, payload, responseText, parsed, choices, choice, message, content, contentJson
-        systemPrompt = "You write clear, engaging blog post content for a classic ASP blog. Return only valid JSON with two keys: summary and body. Summary must be 1 to 2 sentences. Body must be 3 to 5 short paragraphs separated by blank lines. Do not use markdown fences, bullets, or code blocks."
+        systemPrompt = "You write clear, engaging blog post content for a classic ASP blog. Return only valid JSON with three keys: summary, image_prompt, and body. Summary must be 1 to 2 sentences. image_prompt must be a concise visual description suitable for an AI image generator and should not mention markdown. Body must be 3 to 5 short paragraphs of HTML with simple semantic tags like p, strong, em, ul, ol, and h2. Do not use markdown fences or code blocks."
 
-        userPrompt = BuildGenerationPrompt(post)
+        userPrompt = BuildGenerationPrompt(post) & vbCrLf & vbCrLf & _
+                     "Also return an image_prompt field that describes a magazine-style feature image for this post."
 
         payload = "{""model"":""" & JsonEscape(modelName) & """,""messages"":[{""role"":""system"",""content"":""" & JsonEscape(systemPrompt) & """},{""role"":""user"",""content"":""" & JsonEscape(userPrompt) & """}],""temperature"":0.7}"
 
@@ -286,6 +289,7 @@ Class AdminController_Class
 
         If parsed.data.Exists("summary") Then generatedSummary = Trim(CStr(parsed.data.Item("summary")))
         If parsed.data.Exists("body") Then generatedBody = Trim(CStr(parsed.data.Item("body")))
+        If parsed.data.Exists("image_prompt") Then generatedImagePrompt = Trim(CStr(parsed.data.Item("image_prompt")))
     End Sub
 
     Private Sub UpdateCommentApproval(ByVal id, ByVal isApproved, ByVal successMessage)
@@ -323,6 +327,25 @@ Class AdminController_Class
         HttpPostJson = http.responseText
     End Function
 
+    Private Function BuildGeneratedImageHtml(ByVal imagePrompt, ByVal titleText, ByVal summaryText)
+        Dim promptText, altText, imageUrl
+        promptText = Trim(CStr(imagePrompt))
+
+        If Len(promptText) = 0 Then
+            BuildGeneratedImageHtml = ""
+            Exit Function
+        End If
+
+        altText = Trim(CStr(summaryText))
+        If Len(altText) = 0 Then altText = Trim(CStr(titleText))
+        If Len(altText) = 0 Then altText = "Feature image"
+
+        imageUrl = AiImageUrl(promptText)
+        BuildGeneratedImageHtml = "<figure class=""post-feature-image mb-4"">" & _
+                                  "<img class=""img-fluid rounded-4"" src=""" & Server.HTMLEncode(imageUrl) & """ alt=""" & Server.HTMLEncode(altText) & """ />" & _
+                                  "</figure>"
+    End Function
+
     Private Function ExtractJsonObject(ByVal text)
         Dim startPos, endPos
         startPos = InStr(text, "{")