chore: polish demo and SQL editor UI

Remove debug click counters from the SQL editor, align README examples
with the current demo, and document Marimo auth tokens for shared hosts.

Author: eddietejeda

README.md

@@ -81,14 +81,16 @@ See `examples/demo.py` for a full runnable notebook flow.
 
 ## Examples
 
-- `examples/demo.py` — end-to-end browser + editor + result rendering flow.
+- `examples/demo.py` — tabbed explorer with workspace selection, connection health, recent results (selectable table), run history, and a native `mo.sql` cell.
 
-Run:
+Run locally (single-user machine):
 
 ```bash
 uv run marimo edit examples/demo.py --no-token
 ```
 
+On a **shared or networked host**, omit `--no-token` and use the access token printed in the terminal URL. Without it, anyone who can reach the Marimo port can run queries against your Hotdata workspace.
+
 ## Layout
 
 This repo is intentionally thin: **API client, env helpers, and result models** live in **hotdata-runtime**; **hotdata-marimo** only adds Marimo widgets (`sql_editor`, `table_browser`, `display` for tables/status/history, `workspace_selector`). Import `HotdataClient` / `QueryResult` / `from_env` from **`hotdata_marimo`** or directly from **`hotdata_runtime`**.

examples/demo.py

@@ -46,6 +46,9 @@ def _(mo):
     mo.md(r"""
     ## HotData explorer
     Use the tabs below to switch between workspaces, connection status, recent results, and run history.
+
+    On a shared or networked host, run Marimo **without** `--no-token` and open the printed URL
+    with its access token so only you can use this notebook.
     """)
     return
 
@@ -70,7 +73,7 @@ def _(history, mo, recent_tab, status, workspace):
 @app.cell
 def _(client, mo):
     _df = mo.sql(
-        f"""
+        """
         SELECT 1 AS example_value
         """,
         engine=client

hotdata_marimo/sql_editor.py

@@ -56,11 +56,6 @@ def ui(self):
         return mo.vstack(
             [
                 self.sql,
-                mo.md(
-                    f"_Run clicks: {self.run.value} · "
-                    f"Rerun clicks: {self.rerun.value} · "
-                    f"Clear clicks: {self.clear.value}_"
-                ),
                 mo.hstack(
                     [
                         self.run,