Improve UI text and instructions

- Only include 'Applied:' in preprocessing metadata when filters are actually applied
- Move file upload instructions directly into the file uploader label
- Remove redundant upload message when no file is selected
- Simplify and clean up initial text

app.py

@@ -465,12 +465,10 @@ with main_tab1:
     # File uploader in the left column
     with left_col:
         st.markdown("""
-        Upload an image or PDF file to get started. 
-        
         Using the latest `mistral-ocr-latest` model for advanced document understanding.
         """)
         
-        uploaded_file = st.file_uploader("Choose a file", type=["pdf", "png", "jpg", "jpeg"])
+        uploaded_file = st.file_uploader("Choose a PDF or image file to get started", type=["pdf", "png", "jpg", "jpeg"])
         
         # Removed seed prompt instructions from here, moving to sidebar
 
@@ -937,21 +935,22 @@ with main_tab1:
                     st.image(io.BytesIO(processed_bytes), width=300)
                     
                     # Show preprocessing metadata next to the image
-                    meta_text = "Applied: "
+                    meta_items = []
                     if preprocessing_options.get("document_type", "standard") != "standard":
-                        meta_text += f"Document type ({preprocessing_options['document_type']}), "
+                        meta_items.append(f"Document type ({preprocessing_options['document_type']})")
                     if preprocessing_options.get("grayscale", False):
-                        meta_text += "Grayscale, "
+                        meta_items.append("Grayscale")
                     if preprocessing_options.get("denoise", False):
-                        meta_text += "Denoise, "
+                        meta_items.append("Denoise")
                     if preprocessing_options.get("contrast", 0) != 0:
-                        meta_text += f"Contrast ({preprocessing_options['contrast']}), "
+                        meta_items.append(f"Contrast ({preprocessing_options['contrast']})")
                     if preprocessing_options.get("rotation", 0) != 0:
-                        meta_text += f"Rotation ({preprocessing_options['rotation']}°), "
+                        meta_items.append(f"Rotation ({preprocessing_options['rotation']}°)")
                     
-                    # Remove trailing comma and space
-                    meta_text = meta_text.rstrip(", ")
-                    st.caption(meta_text)
+                    # Only show "Applied:" if there are actual preprocessing steps
+                    if meta_items:
+                        meta_text = "Applied: " + ", ".join(meta_items)
+                        st.caption(meta_text)
                 except Exception as e:
                     st.error(f"Error in preprocessing: {str(e)}")
                     st.info("Try using grayscale preprocessing for PNG images with transparency")
@@ -1582,8 +1581,7 @@ with main_tab1:
             except Exception as e:
                 st.error(f"Error processing document: {str(e)}")
     else:
-        # Display basic info when no file is uploaded
-        st.markdown('<div style="text-align: left; width: auto; display: inline-block;">Upload a document to get started using the file uploader above.</div>', unsafe_allow_html=True)
+        # Empty placeholder - we've moved the upload instruction to the file_uploader
         
         # Show example images in a grid
         st.subheader("Example Documents")