feat: adjust LLM parameters and add project name preservation rule for logo generation

Author: arolleaguekeng

api/services/BandIdentity/branding.service.ts

@@ -439,10 +439,10 @@ export class BrandingService extends GenericService {
       provider: LLMProvider.GEMINI,
       modelName: "gemini-2.0-flash",
       llmOptions: {
-        maxOutputTokens: 5000,
-        temperature: 0.7,
+        maxOutputTokens: 3500,
+        temperature: 0.1,
         topP: 0.9,
-        topK: 40,
+        topK: 50,
       },
     });
     const colorsResult: ISectionResult = sectionResults[0];
@@ -627,7 +627,7 @@ export class BrandingService extends GenericService {
       {
         promptConstant: optimizedPrompt,
         stepName: `Logo Concept ${conceptIndex + 1}`,
-        maxOutputTokens: 2000,
+        maxOutputTokens: 3500,
         modelParser: (content) => {
           try {
             // Parse JSON response containing SVG

api/services/BandIdentity/prompts/singleGenerations/00_logo-generation-section.prompt.ts

@@ -43,6 +43,7 @@ LAYOUT INTELLIGENCE:
 - Adjust viewBox dimensions accordingly: horizontal=200x80, vertical=120x120
 - Ensure no overlapping between icon and text elements
 - Maintain professional spacing and visual balance
+- don't change project name. take it from the project description that is provided to you
 
 SVG STRUCTURE EXAMPLE:
 <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 200 80" width="200" height="80">