Switch to using custom svg sparkline for exercise graphs on person view, this isnt a proper implementation as it separate requests for each exercise selected (Want to get rid of dependency on plotly)

db.py

@@ -464,7 +464,7 @@ class DataBase():
             'SELECT exercise_id, name FROM exercise')
         return exercises
     
-    def get_exercise_progress_for_user(self, person_id, exercise_id):
+    def get_exercise_progress_for_user(self, person_id, exercise_id, min_date=None, max_date=None):
         # Execute SQL query to fetch topset data for a specific person and exercise
         topsets = self.execute("""
             SELECT 
@@ -479,10 +479,13 @@ class DataBase():
             JOIN 
                 workout W ON T.workout_id = W.workout_id
             WHERE
-                W.person_id = %s AND E.exercise_id = %s
+                W.person_id = %s 
+                AND E.exercise_id = %s AND
+                (%s IS NULL OR W.start_date >= %s) AND
+                (%s IS NULL OR W.start_date <= %s)
             ORDER BY 
                 W.start_date;
-        """, [person_id, exercise_id])
+        """, [person_id, exercise_id, min_date, min_date, max_date, max_date])
 
         # Return None if no topsets found
         if not topsets:
@@ -500,9 +503,9 @@ class DataBase():
         
         # Calculate viewBox dimensions
         date_range = max_date - min_date
-        e1rm_range = max_e1rm - min_e1rm
-        reps_range = max_reps - min_reps
-        weight_range = max_weight - min_weight
+        e1rm_range = (max_e1rm - min_e1rm) or 1
+        reps_range = (max_reps - min_reps) or 1
+        weight_range = (max_weight - min_weight) or 1
         vb_width, vb_height = date_range.days, e1rm_range
         vb_width *= 200 / vb_width  # Scale to 200px width
         vb_height *= 75 / vb_height  # Scale to 75px height