Update app.py

app.py

@@ -9,8 +9,8 @@ from reportlab.lib.pagesizes import A4
 genai.configure(api_key=os.getenv("GEMINI_API_KEY"))
 
 # ---------- PROMPTS ----------
-TRANSCRIPTION_PROMPT = """ ... """  # unchanged
-GRADING_PROMPT = """ ... """        # unchanged
+TRANSCRIPTION_PROMPT = """ Persona: You are an expert transcriptionist specializing in scientific and mathematical documents. Your primary goal is to convert handwritten mathematical work into a perfectly formatted, machine-readable Markdown document using LaTeX for all mathematical notation. Rules: - Transcribe exactly what is written, do not correct errors. - Use $...$ for inline math, $$...$$ for block math. - Ignore struck-through text. - Preserve structure: bold for Q numbers (**1.**), step-by-step math with \\begin{align*}. - If a symbol is ambiguous, mark as [x?]. Output must be a clean Markdown string. """ 
+GRADING_PROMPT = """ You are an official examiner. Grade the student transcription using the question paper and the official marking scheme. Rules: 1. Apply marks exactly as per the markscheme (M1, A1, etc.). 2. M marks must be earned before A marks. 3. Justify each awarded or withheld mark with clear reasoning. 4. Classify all errors as Conceptual Error, Silly Mistake, or None. 5. Follow dependency between M and A strictly. 6. Do not give marks outside the markscheme. Output must be a structured grading report with reasoning. """
 
 # ---------- HELPER: Save to PDF ----------
 def save_as_pdf(text, filename="output.pdf"):