analytical-viz: restore Apply memory-min button

An "Apply memory-min" button was removed when the 3 latency-optimal
buttons were added. Consequence: after clicking any latency-optimal
button, the sidebar sliders drift from the memory-min caption and
there was no way to sync them back without restarting the app or
manually adjusting each slider.

Restore the button, positioned below the caption and above the 3
latency-optimal buttons. Clicking it snaps cp/tp/pp/dp/cp_placement
to what the caption shows and clears _pl_active_scope to "full" so
the Physical Layout tab stops filtering.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

tests/analytical_visualization/app.py

@@ -185,6 +185,18 @@ with st.sidebar.expander("Parallelism", expanded=True):
         f"{_default_suggestion.pes_used} PEs "
         f"(cp_placement={_default_suggestion.cp_placement})"
     )
+    # Memory-min apply — snap sliders back to what the caption says.
+    if st.button("Apply memory-min", width='stretch',
+                  key="_sb_apply_memmin",
+                  help="Set sliders to the memory-min config shown above "
+                       "(smallest deployment that fits)."):
+        st.session_state["cp"] = _snap(_default_suggestion.cp, _CP_OPTS)
+        st.session_state["tp"] = _snap(_default_suggestion.tp, _TP_OPTS)
+        st.session_state["pp"] = _snap(_default_suggestion.pp, _PP_OPTS)
+        st.session_state["dp"] = 1
+        st.session_state["cp_placement"] = _default_suggestion.cp_placement
+        st.session_state["_pl_active_scope"] = "full"
+        st.rerun()
     # Three latency-optimal apply buttons — pick a scope, load the
     # latency-min Pareto config into the sidebar sliders.
     from tests.analytical_visualization.auto_explore import (