add index as selectable column

app.py

@@ -48,6 +48,7 @@ PARQUET_EMB_COL = "tx1-70m"
 # helper to read AnnData header
 def read_anndata_header(fileobj):
     adata = sc.read_h5ad(fileobj.name, backed="r")
+    adata.var = adata.var.reset_index(drop=False)
     layers = list(adata.layers.keys())
     var_cols = list(adata.var.columns)
     obs_cols = list(adata.obs.columns)
@@ -154,6 +155,7 @@ def _embed(adata_bytes, layer_name, feature_col, use_symbols, progress):
 
         # load into memory, subsetting if needed
         adata = adata_backed[:limit, :].to_memory()
+        adata.var = adata.var.reset_index(drop=False)
         try:
             adata_backed.file.close()
         except Exception:
@@ -407,23 +409,22 @@ def run_pipeline(fileobj, layer_choice, var_choice, obs_choice, use_symbols, pro
 
 # specify app layout
 css = """
-h1 {text-align: center;}
 div#tahoe-logo {
-    margin-top: 20px;
-    margin-bottom: 20px;
+    margin-top: 10px;
+    margin-bottom: 10px;
 }
-#logo-dark {display: none;}
+#logo-light {display: none;}
 @media (prefers-color-scheme: dark) {
-  #logo-light {display: none;}
-  #logo-dark {display: block;}
+  #logo-dark {display: none;}
+  #logo-light {display: block;}
 }
 """
 with gr.Blocks(title=APP_TITLE, css=css) as demo:
 
     # header
     with gr.Row(elem_id="tahoe-logo", equal_height=True):
-        light_logo = gr.Image(
-            value="tahoe-navy-logo.png",
+        logo_light = gr.Image(
+            value="tahoe-white-logo.png",
             height=50,
             show_label=False,
             container=False,
@@ -434,8 +435,8 @@ with gr.Blocks(title=APP_TITLE, css=css) as demo:
             show_download_button=False,
             scale=0
         )
-        dark_logo = gr.Image(
-            value="tahoe-white-logo.png",
+        logo_dark = gr.Image(
+            value="tahoe-navy-logo.png",
             height=50,
             show_label=False,
             container=False,