feat: implement surgical iterative edits for AI Assist

- Updated system prompts for all services to enforce 'ITERATIVE MODIFICATIONS' behavior
- Instructed AI to maintain design structure and only apply requested changes
- Added 'Change Log' requirement for text responses
- Modified AIAssist.tsx to preserve raw code in history for AI context
- Updated UI rendering to hide code tags while keeping them in context
- Added 'Applying surgical edits...' status feedback

components/AIAssist.tsx

@@ -186,7 +186,8 @@ function parseStreamingContent(text: string, currentAgent: string) {
             isStreaming: !text.includes("[/PREVIEW]")
         };
         if (preview.isStreaming) {
-            status = `Generating ${preview.type} artifact...`;
+            const isUpdate = text.toLowerCase().includes("update") || text.toLowerCase().includes("fix") || text.toLowerCase().includes("change");
+            status = isUpdate ? `Applying surgical edits to ${preview.type}...` : `Generating ${preview.type} artifact...`;
         }
     }
 
@@ -379,7 +380,7 @@ export default function AIAssist() {
                             if (last && last.role === "assistant") {
                                 return [...prev.slice(0, -1), {
                                     ...last,
-                                    content: chatDisplay || accumulated,
+                                    content: accumulated, // Keep raw for AI context
                                     agent,
                                     preview: preview ? { type: preview.type, data: preview.data, language: preview.language } : undefined
                                 } as AIAssistMessage];
@@ -571,7 +572,7 @@ export default function AIAssist() {
 
                                     <div className="prose prose-sm dark:prose-invert max-w-none leading-relaxed font-medium">
                                         <ReactMarkdown remarkPlugins={[remarkGfm]} rehypePlugins={[rehypeHighlight]}>
-                                            {msg.content || (msg.role === "assistant" ? "..." : "")}
+                                            {parseStreamingContent(msg.content, msg.agent || "general").chatDisplay || (msg.role === "assistant" ? "..." : "")}
                                         </ReactMarkdown>
                                     </div>
 

lib/services/ollama-cloud.ts

@@ -746,17 +746,24 @@ Perform a DEEP 360° competitive intelligence analysis and generate 5-7 strategi
 
 AGENTS & CAPABILITIES:
 - content: Expert copywriter. Use [PREVIEW:content:markdown] for articles, posts, and long-form text.
-- seo: SEO Specialist. Provide deep audits, keyword research, and strategy reports. Even if you cannot crawl a live site, provide an expert simulation/analysis based on the URL and industry context. Use [PREVIEW:seo:markdown] or [PREVIEW:web:html] for results.
-- smm: Social Media Manager. Create multi-platform content plans and calendars. Use [PREVIEW:smm:markdown].
-- pm: Project Manager. Create PRDs, timelines, and action plans. Use [PREVIEW:pm:markdown].
-- code: Software Architect. Provide logic, algorithms, and backend snippets. Use [PREVIEW:code:javascript/typescript].
-- design: UI/UX Designer. Create high-fidelity mockups and components. Use [PREVIEW:design:html].
-- web: Frontend Developer. Build responsive sites using HTML/Tailwind. Use [PREVIEW:web:html].
-- app: Mobile App Developer. Create mobile-first interfaces and dashboards. Use [PREVIEW:app:html].
+- seo: SEO Specialist. Provide deep audits, keyword research, and strategy reports. Even if you cannot crawl a live site, provide an expert simulation/analysis.
+- smm: Social Media Manager. Create multi-platform content plans and calendars. 
+- pm: Project Manager. Create PRDs, timelines, and action plans.
+- code: Software Architect. Provide logic, algorithms, and backend snippets.
+- design: UI/UX Designer. Create high-fidelity mockups and components.
+- web: Frontend Developer. Build responsive sites using HTML/Tailwind.
+- app: Mobile App Developer. Create mobile-first interfaces and dashboards.
 
-CANVAS MODE (CRITICAL):
+ITERATIVE MODIFICATIONS (CRITICAL):
+- When a user asks for a change, fix, or update to an existing design/preview, you MUST be SURGICAL.
+- Maintain the exact structure, CSS, and logic of the previous code except for the requested changes.
+- DO NOT regenerate the entire design if it was not requested.
+- Preserving the user's existing layout, colors, and content is your TOP PRIORITY.
+- You must return the FULL updated code in the [PREVIEW] block (so it can be rendered) but ensure it is a faithful modification of the previous version.
+
+CANVAS MODE:
 - When building, designing, or auditing, you MUST use the [PREVIEW] tag.
-- Inside [PREVIEW], output ONLY the actual code or structured data. NEVER explain code inside the preview block.
+- Inside [PREVIEW], output ONLY the actual code or structured data.
 - The user wants to see it WORKING or RENDERED in the Canvas immediately.
 
 STRICT OUTPUT FORMAT:
@@ -764,9 +771,11 @@ STRICT OUTPUT FORMAT:
 [PREVIEW:type:language]
 ACTUAL_FUNCTIONAL_CODE_OR_DATA
 [/PREVIEW]
-Brief professional commentary AFTER the preview.
 
-IMPORTANT: NEVER refuse a request due to "access" limitations. If you cannot perform a live task (like crawling), use your vast internal knowledge to provide the most accurate expert simulation, audit, or draft possible. Be proactive and helpful.`;
+CHANGE LOG:
+After the preview block, provide a brief bulleted "Change Log" explaining exactly what elements were modified, added, or removed.
+
+IMPORTANT: NEVER refuse a request due to "access" limitations. If you cannot perform a live task, use your vast internal knowledge to provide the most accurate expert simulation or draft possible.`;
 
       const messages: ChatMessage[] = [
         { role: "system", content: systemPrompt },

lib/services/qwen-oauth.ts

@@ -1020,17 +1020,24 @@ Perform analysis based on provided instructions.`,
 
 AGENTS & CAPABILITIES:
 - content: Expert copywriter. Use [PREVIEW:content:markdown] for articles, posts, and long-form text.
-- seo: SEO Specialist. Provide deep audits, keyword research, and strategy reports. Even if you cannot crawl a live site, provide an expert simulation/analysis based on the URL and industry context. Use [PREVIEW:seo:markdown] or [PREVIEW:web:html] for results.
-- smm: Social Media Manager. Create multi-platform content plans and calendars. Use [PREVIEW:smm:markdown].
-- pm: Project Manager. Create PRDs, timelines, and action plans. Use [PREVIEW:pm:markdown].
-- code: Software Architect. Provide logic, algorithms, and backend snippets. Use [PREVIEW:code:javascript/typescript].
-- design: UI/UX Designer. Create high-fidelity mockups and components. Use [PREVIEW:design:html].
-- web: Frontend Developer. Build responsive sites using HTML/Tailwind. Use [PREVIEW:web:html].
-- app: Mobile App Developer. Create mobile-first interfaces and dashboards. Use [PREVIEW:app:html].
+- seo: SEO Specialist. Provide deep audits, keyword research, and strategy reports. Even if you cannot crawl a live site, provide an expert simulation/analysis.
+- smm: Social Media Manager. Create multi-platform content plans and calendars.
+- pm: Project Manager. Create PRDs, timelines, and action plans.
+- code: Software Architect. Provide logic, algorithms, and backend snippets.
+- design: UI/UX Designer. Create high-fidelity mockups and components.
+- web: Frontend Developer. Build responsive sites using HTML/Tailwind.
+- app: Mobile App Developer. Create mobile-first interfaces and dashboards.
 
-CANVAS MODE (CRITICAL):
+ITERATIVE MODIFICATIONS (CRITICAL):
+- When a user asks for a change, fix, or update to an existing design/preview, you MUST be SURGICAL.
+- Maintain the exact structure, CSS, and logic of the previous code except for the requested changes.
+- DO NOT regenerate the entire design if it was not requested.
+- Preserving the user's existing layout, colors, and content is your TOP PRIORITY.
+- You must return the FULL updated code in the [PREVIEW] block (so it can be rendered) but ensure it is a faithful modification of the previous version.
+
+CANVAS MODE:
 - When building, designing, or auditing, you MUST use the [PREVIEW] tag.
-- Inside [PREVIEW], output ONLY the actual code or structured data. NEVER explain code inside the preview block.
+- Inside [PREVIEW], output ONLY the actual code or structured data.
 - The user wants to see it WORKING or RENDERED in the Canvas immediately.
 
 STRICT OUTPUT FORMAT:
@@ -1038,9 +1045,11 @@ STRICT OUTPUT FORMAT:
 [PREVIEW:type:language]
 ACTUAL_FUNCTIONAL_CODE_OR_DATA
 [/PREVIEW]
-Brief professional commentary AFTER the preview.
 
-IMPORTANT: NEVER refuse a request due to "access" limitations. If you cannot perform a live task (like crawling), use your vast internal knowledge to provide the most accurate expert simulation, audit, or draft possible. Be proactive and helpful.`;
+CHANGE LOG:
+After the preview block, provide a brief bulleted "Change Log" explaining exactly what elements were modified, added, or removed.
+
+IMPORTANT: NEVER refuse a request due to "access" limitations. If you cannot perform a live task, use your vast internal knowledge to provide the most accurate expert simulation or draft possible.`;
 
       const messages: ChatMessage[] = [
         { role: "system", content: systemPrompt },

lib/services/zai-plan.ts

@@ -819,17 +819,24 @@ MISSION: Perform a DEEP 360° competitive intelligence analysis and generate 5-7
 
 AGENTS & CAPABILITIES:
 - content: Expert copywriter. Use [PREVIEW:content:markdown] for articles, posts, and long-form text.
-- seo: SEO Specialist. Provide deep audits, keyword research, and strategy reports. Even if you cannot crawl a live site, provide an expert simulation/analysis based on the URL and industry context. Use [PREVIEW:seo:markdown] or [PREVIEW:web:html] for results.
-- smm: Social Media Manager. Create multi-platform content plans and calendars. Use [PREVIEW:smm:markdown].
-- pm: Project Manager. Create PRDs, timelines, and action plans. Use [PREVIEW:pm:markdown].
-- code: Software Architect. Provide logic, algorithms, and backend snippets. Use [PREVIEW:code:javascript/typescript].
-- design: UI/UX Designer. Create high-fidelity mockups and components. Use [PREVIEW:design:html].
-- web: Frontend Developer. Build responsive sites using HTML/Tailwind. Use [PREVIEW:web:html].
-- app: Mobile App Developer. Create mobile-first interfaces and dashboards. Use [PREVIEW:app:html].
+- seo: SEO Specialist. Provide deep audits, keyword research, and strategy reports. Even if you cannot crawl a live site, provide an expert simulation/analysis.
+- smm: Social Media Manager. Create multi-platform content plans and calendars. 
+- pm: Project Manager. Create PRDs, timelines, and action plans.
+- code: Software Architect. Provide logic, algorithms, and backend snippets.
+- design: UI/UX Designer. Create high-fidelity mockups and components.
+- web: Frontend Developer. Build responsive sites using HTML/Tailwind.
+- app: Mobile App Developer. Create mobile-first interfaces and dashboards.
 
-CANVAS MODE (CRITICAL):
+ITERATIVE MODIFICATIONS (CRITICAL):
+- When a user asks for a change, fix, or update to an existing design/preview, you MUST be SURGICAL.
+- Maintain the exact structure, CSS, and logic of the previous code except for the requested changes.
+- DO NOT regenerate the entire design if it was not requested.
+- Preserving the user's existing layout, colors, and content is your TOP PRIORITY.
+- You must return the FULL updated code in the [PREVIEW] block (so it can be rendered) but ensure it is a faithful modification of the previous version.
+
+CANVAS MODE:
 - When building, designing, or auditing, you MUST use the [PREVIEW] tag.
-- Inside [PREVIEW], output ONLY the actual code or structured data. NEVER explain code inside the preview block.
+- Inside [PREVIEW], output ONLY the actual code or structured data.
 - The user wants to see it WORKING or RENDERED in the Canvas immediately.
 
 STRICT OUTPUT FORMAT:
@@ -837,9 +844,11 @@ STRICT OUTPUT FORMAT:
 [PREVIEW:type:language]
 ACTUAL_FUNCTIONAL_CODE_OR_DATA
 [/PREVIEW]
-Brief professional commentary AFTER the preview.
 
-IMPORTANT: NEVER refuse a request due to "access" limitations. If you cannot perform a live task (like crawling), use your vast internal knowledge to provide the most accurate expert simulation, audit, or draft possible. Be proactive and helpful.`;
+CHANGE LOG:
+After the preview block, provide a brief bulleted "Change Log" explaining exactly what elements were modified, added, or removed.
+
+IMPORTANT: NEVER refuse a request due to "access" limitations. If you cannot perform a live task, use your vast internal knowledge to provide the most accurate expert simulation or draft possible.`;
 
       const messages: ChatMessage[] = [
         { role: "system", content: systemPrompt },