Update Prism branding assets

- replace app logo with final selected Prism lockup and icon
- update sidebar to use lockup asset
- add canonical logo files for future mockups and branding

4 files changed, 2 insertions, 6 deletions

diff --git a/app.py b/app.py
index 0090405..d719b7a 100644
--- a/app.py
+++ b/app.py
@@ -73,12 +73,8 @@ if "ticker" not in st.session_state:
 # ── Sidebar ──────────────────────────────────────────────────────────────────
 
 with st.sidebar:
-    col_logo, col_title = st.columns([1, 2])
-    with col_logo:
-        st.image("assets/logo.png", width=60)
-    with col_title:
-        st.markdown("### Prism")
-        st.caption("Financial Analysis Dashboard")
+    st.image("assets/logo-lockup.png", use_container_width=True)
+    st.caption("Financial Analysis Dashboard")
     st.divider()
 
     with st.form("ticker_search_form", clear_on_submit=False):
diff --git a/assets/logo-icon.png b/assets/logo-icon.png
new file mode 100644
index 0000000..9ade177
--- /dev/null
+++ b/assets/logo-icon.png
diff --git a/assets/logo-lockup.png b/assets/logo-lockup.png
new file mode 100644
index 0000000..0b92b97
--- /dev/null
+++ b/assets/logo-lockup.png
diff --git a/assets/logo.png b/assets/logo.png
index 1305c3e..9ade177 100644
--- a/assets/logo.png
+++ b/assets/logo.png