Set DTL as default camera view and remove blank option

- Remove blank option from camera view selection
- Set 'Down the Line (DTL)' as the default selection (index=0)
- Remove red asterisk since selection is no longer required
- Update label to indicate DTL is automatically set
- Streamline user experience by eliminating manual camera view selection

app/streamlit_app.py

@@ -1518,21 +1518,17 @@ def render_step_1():
     """Step 1: Upload Swing Video"""
     st.markdown('<h2 style="color: #0B3B0B; font-family: Georgia, serif;">Step 1: Upload Your Video</h2>', unsafe_allow_html=True)
     
-    # Camera view selection - Front Facing disabled for now
-    st.markdown("### 📹 Select Camera View <span style='color: red;'>*</span>", unsafe_allow_html=True)
+    # Camera view selection - DTL only, set as default
+    st.markdown("### 📹 Camera View", unsafe_allow_html=True)
     camera_view = st.radio(
-        "Choose the camera angle of your video:",
-        options=["", "Down the Line (DTL)"],  # Front Facing option temporarily disabled
-        index=0,  # Default to empty selection
+        "Camera angle (automatically set to Down the Line):",
+        options=["Down the Line (DTL)"],  # Only DTL option, Front Facing disabled
+        index=0,  # Default to DTL
         key="camera_view",
         horizontal=True,
         help="DTL: Camera positioned behind/in front of golfer along target line. (Front Facing view temporarily disabled)"
     )
     
-    # Show validation message if no camera view selected
-    if not camera_view or camera_view == "":
-        st.warning("⚠️ Please select a camera view to continue.")
-    
     # Club selection (always show)
     st.markdown("### ⛳ Club Type")
     club_type = st.radio(