apply new sheet prefix T3

app.py

@@ -34,7 +34,7 @@ def load_and_preview(file, n):
             xls = pd.ExcelFile(filename)
             rows = []
             for sheet in xls.sheet_names:
-                if sheet.startswith("T3_"):
+                if sheet.startswith("T3"):
                     df = pd.read_excel(xls, sheet_name=sheet, header=None)
                     h0 = df.iloc[1].ffill()
                     h1 = df.iloc[2].fillna("")
@@ -54,7 +54,7 @@ def load_and_preview(file, n):
                     raw["er_dec"]    = raw["er_hex"].apply(hex_to_int)
                     raw["power_meas"] = pd.to_numeric(raw["EA-4000 Power"], errors="coerce")
                     raw["er_meas"]    = pd.to_numeric(raw["EA-4000 ER"],    errors="coerce")
-                    raw["Device"]     = sheet.replace("T3_", "")
+                    raw["Device"]     = sheet.replace("T3", "")
                     valid = raw[raw["power_meas"].notna()]
 
                     rows.append(valid[[
@@ -62,7 +62,7 @@ def load_and_preview(file, n):
                         "power_dec","er_dec","power_meas","er_meas"
                     ]])
             if not rows:
-                raise ValueError("No valid sheets (prefix 'T3_') found in Excel file.")
+                raise ValueError("No valid sheets (prefix 'T3') found in Excel file.")
             data_df = pd.concat(rows, ignore_index=True)
         elif ext == '.csv':
             # CSV format (exported)