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src/lib/utils/prompt-builder.ts

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+/**
+ * Gemini için Fotoğrafçılık Taslağı (JSON Blueprint)
+ * Bu yapı modeli profesyonel bir fotoğrafçı gibi düşünmeye zorlar.
+ * Client-side güvenlidir.
+ */
+export const buildPhotorealisticPrompt = (corePrompt: string): string => {
+  const blueprint = {
+    subject_context: corePrompt,
+    style: {
+      direction: 'Professional Lifestyle Photography / Authentic Brand Content',
+      aesthetic: 'Modern, bright, engaging, premium but approachable',
+      lighting: 'Natural ambient daylight mixed with soft studio fill, warm tones',
+    },
+    camera_settings: {
+      sensor: 'Full-frame Digital Sensor (Sony Alpha / Canon R5)',
+      lens: '35mm or 50mm Prime (Standard Social Media View)',
+      depth_of_field: 'Moderate depth of field (sharp subject, slightly softened background)',
+      shutter: '1/125s natural motion freeze',
+    },
+    composition_rules: {
+      framing: 'Rule of thirds, center-weighted for social media engagement',
+      angle: 'Eye-level or 45-degree isometric (depending on subject)',
+      aspect_ratio_fit: 'Optimized for Instagram/LinkedIn',
+    },
+    quality_assurance: {
+      clarity: 'Perfect Focus',
+      noise_level: 'Minimal natural grain allowed for authenticity',
+      texture_detail: 'High fidelity materials',
+      render_engine: 'Photorealistic Photography Style (Not CGI looking)',
+    },
+    prohibited_elements: ['text watermarks', 'blurry', 'distorted', 'ugly', 'low resolution'],
+  };
+
+  return JSON.stringify(blueprint, null, 2);
+};