fix(dashboard): DPP tags properly dynamic based on user target exam

backend/fix_ions.py

@@ -0,0 +1,59 @@
+import sys
+sys.path.append('/app')
+from sqlmodel import Session, select
+from database import engine
+import models
+
+def fix_text(text):
+    if not text: return text
+    
+    # Fix NO3- where 3 is on the next line
+    text = text.replace('NO−\n3', '$NO_3^-$')
+    text = text.replace('NO-\n3', '$NO_3^-$')
+    
+    text = text.replace('CO2−\n3', '$CO_3^{2-}$')
+    text = text.replace('CO2-\n3', '$CO_3^{2-}$')
+    
+    text = text.replace('SO2−\n4', '$SO_4^{2-}$')
+    text = text.replace('SO2-\n4', '$SO_4^{2-}$')
+    
+    text = text.replace('PO3−\n4', '$PO_4^{3-}$')
+    text = text.replace('PO3-\n4', '$PO_4^{3-}$')
+    
+    # Also generic charges if they are on same line
+    text = text.replace('NO3-', '$NO_3^-$')
+    text = text.replace('CO32-', '$CO_3^{2-}$')
+    text = text.replace('SO42-', '$SO_4^{2-}$')
+    text = text.replace('PO43-', '$PO_4^{3-}$')
+    text = text.replace('O2-', '$O^{2-}$')
+    text = text.replace('F-', '$F^-$')
+    text = text.replace('Cl-', '$Cl^-$')
+    text = text.replace('Br-', '$Br^-$')
+    text = text.replace('I-', '$I^-$')
+    text = text.replace('Na+', '$Na^+$')
+    text = text.replace('K+', '$K^+$')
+    text = text.replace('Ca2+', '$Ca^{2+}$')
+    text = text.replace('Mg2+', '$Mg^{2+}$')
+    text = text.replace('Fe2+', '$Fe^{2+}$')
+    text = text.replace('Fe3+', '$Fe^{3+}$')
+    text = text.replace('Cu2+', '$Cu^{2+}$')
+    text = text.replace('Al3+', '$Al^{3+}$')
+    
+    # Check if we have O3 (ozone) that wasn't replaced
+    text = text.replace('O3', '$O_3$')
+
+    return text
+
+with Session(engine) as session:
+    questions = session.exec(select(models.Question)).all()
+    count = 0
+    for q in questions:
+        old_text = q.question_text
+        new_text = fix_text(old_text)
+        if old_text != new_text:
+            q.question_text = new_text
+            session.add(q)
+            count += 1
+            print(f'Updated Q {q.id}')
+    session.commit()
+    print(f'Successfully updated {count} questions for ions.')