new logo and better navigation

content/ptxqc_configure.py

@@ -10,4 +10,6 @@
 # Configuration is optional — always offer the link to step 3.
 import streamlit as st
 st.divider()
-st.page_link("content/ptxqc_run.py", label="Next: **3. Create Report**", icon="🚀")
+st.page_link(
+    "content/ptxqc_run.py", label="Next step: **3. Create Report**", icon="➡️"
+)

content/ptxqc_run.py

@@ -10,5 +10,7 @@
 # Once a report exists, link to step 4 to view it.
 if wf.has_report():
     import streamlit as st
-    st.success("✅ Report ready. Next step:")
-    st.page_link("content/ptxqc_results.py", label="**4. Report**", icon="📊")
+    st.success("✅ Report ready.")
+    st.page_link(
+        "content/ptxqc_results.py", label="Next step: **4. Report**", icon="➡️"
+    )

content/ptxqc_upload.py

@@ -10,5 +10,7 @@
 # Step 1 done once data is staged → offer the link to step 2.
 if wf.has_inputs():
     import streamlit as st
-    st.success("✅ Data uploaded. Next step:")
-    st.page_link("content/ptxqc_configure.py", label="**2. Configure**", icon="⚙️")
+    st.success("✅ Data uploaded.")
+    st.page_link(
+        "content/ptxqc_configure.py", label="Next step: **2. Configure**", icon="➡️"
+    )

src/common/common.py

@@ -3,6 +3,7 @@
 import uuid
 import json
 import time
+import base64
 import psutil
 import shutil
 
@@ -565,6 +566,20 @@ def page_setup(page: str = "") -> dict[str, Any]:
     return params
 
 
+@st.cache_data
+def get_ptxqc_logo_data_uri() -> str:
+    """
+    Returns the local PTXQC logo as a base64 data URI for inline HTML embedding,
+    or an empty string if the asset is missing. Inlined because Streamlit does not
+    serve assets/ over HTTP by default.
+    """
+    logo_path = Path("assets", "ptxqc-web-logo-horizontal.svg")
+    if not logo_path.exists():
+        return ""
+    encoded = base64.b64encode(logo_path.read_bytes()).decode()
+    return f"data:image/svg+xml;base64,{encoded}"
+
+
 def render_sidebar(page: str = "") -> None:
     """
     Renders the sidebar on the Streamlit app, which includes the workspace switcher,
@@ -776,13 +791,20 @@ def change_workspace():
                 """
                 <style>
                 .version-box {
-                    border: 1px solid #a4a5ad; 
+                    border: 1px solid #a4a5ad;
                     padding: 10px;
                     border-radius: 0.5rem;
                     text-align: center;
                     display: flex;
+                    flex-direction: column;
                     justify-content: center;
-                    align-items: center; 
+                    align-items: center;
+                    gap: 8px;
+                }
+                .version-box img {
+                    width: 100%;
+                    max-width: 220px;
+                    height: auto;
                 }
                 </style>
                 """,
@@ -792,8 +814,11 @@ def change_workspace():
             meta = get_ptxqc_metadata()
             ver = meta["version"] if meta.get("available") else "unknown"
             app_name = st.session_state.settings["app-name"]
+            logo = get_ptxqc_logo_data_uri()
+            logo_img = f'<img src="{logo}" alt="PTXQC logo">' if logo else ""
             st.markdown(
-                f'<div class="version-box">{app_name} (version {ver})</div>',
+                f'<div class="version-box">{logo_img}'
+                f'<span>{app_name} (version {ver})</span></div>',
                 unsafe_allow_html=True,
             )