Update src/streamlit_app.py

src/streamlit_app.py

@@ -236,7 +236,7 @@ model = KNeighborsRegressor(n_neighbors=5, weights="distance")
 model.fit(X_scaled, y)
 
 # ---------------------------
-# PRESET CALLBACKS (use session_state)
+# PRESET CALLBACKS + TOASTS
 # ---------------------------
 def preset_daily():
     s = st.session_state
@@ -260,6 +260,7 @@ def preset_daily():
     s.fuel = "87"
     s.altitude = 200
     s.traction_mode = "Daily"
+    st.toast("Loaded Daily Driver preset 🚙")
 
 def preset_street():
     s = st.session_state
@@ -283,6 +284,7 @@ def preset_street():
     s.fuel = "93"
     s.altitude = 150
     s.traction_mode = "Spirited"
+    st.toast("Loaded Street Fun preset 🌃")
 
 def preset_drag():
     s = st.session_state
@@ -306,6 +308,7 @@ def preset_drag():
     s.fuel = "E85 / Race Blend"
     s.altitude = 100
     s.traction_mode = "Track / Drag"
+    st.toast("Loaded Drag Strip preset 🏁")
 
 def preset_max():
     s = st.session_state
@@ -329,6 +332,7 @@ def preset_max():
     s.fuel = "E85 / Race Blend"
     s.altitude = 0
     s.traction_mode = "Track / Drag"
+    st.toast("Loaded Max Attack preset 🔥")
 
 # ---------------------------
 # HERO
@@ -383,7 +387,7 @@ with left:
     st.markdown('<div class="glass">', unsafe_allow_html=True)
     st.subheader("🎛️ Tune Your Build")
 
-    # Preset buttons
+    # Preset buttons with toasts
     bcol1, bcol2, bcol3, bcol4 = st.columns(4)
     bcol1.button("🚙 Daily Driver", on_click=preset_daily)
     bcol2.button("🌃 Street Fun", on_click=preset_street)
@@ -584,6 +588,11 @@ new_hp = max(base_hp + pred_total_gain, 40.0)
 effective_weight = weight_kg * (1 - weight_reduction / 100.0)
 hp_per_ton = new_hp / (effective_weight / 1000.0)
 
+# 0–100 km/h & 1/4-mile simple estimates (rule-of-thumb)
+zero_to_100 = max(2.8, 12 - (hp_per_ton - 80) / 20)   # lower is faster
+quarter_mile = max(9.0, 18 - (hp_per_ton - 80) / 15)  # lower is faster
+
+# hype + verdict
 hype_raw = np.clip(pred_total_gain / 120 * 100, 0, 100)
 hype_level = int(hype_raw)
 
@@ -596,6 +605,22 @@ elif hype_level < 70:
 else:
     verdict = "Full send, tyres cry for mercy 🏁"
 
+# Scenario hint (simple rule-based label)
+if induction == "None":
+    if base_hp < 180:
+        extra_hint = "+60–80 hp"
+    elif base_hp < 320:
+        extra_hint = "+80–110 hp"
+    else:
+        extra_hint = "+100–150 hp"
+    scenario_hint = f"Try adding a **Turbo** + **Stage 1 tune** on {fuel} for around {extra_hint} more."
+elif tune in ["None", "Mild Street"]:
+    scenario_hint = "Bump to **Stage 2** tune and a slightly higher boost target for a big jump."
+elif fuel != "E85 / Race Blend":
+    scenario_hint = "Switching to **E85 / race blend** with proper tuning could unlock extra timing and power."
+else:
+    scenario_hint = "You’re near kill mode already – consider better tyres, brakes and cooling instead of more power. 😉"
+
 # compute base angle for rev gauge (-90deg to +90deg)
 angle_deg = -90 + (hype_level / 100.0) * 180
 
@@ -609,7 +634,7 @@ with right:
     m2.metric("New Output", f"{new_hp:.1f} HP")
     m3.metric("HP per Ton", f"{hp_per_ton:.1f}")
 
-    # Animated rev limiter gauge
+    # Rev limiter gauge
     st.markdown('<div class="meter-label">Rev Limiter Vibes</div>', unsafe_allow_html=True)
     st.markdown(
         f"""
@@ -625,9 +650,22 @@ with right:
         unsafe_allow_html=True
     )
 
+    # Hype meter + scenario label
     st.markdown('<div class="meter-label">Hype Meter (relative craziness of this build)</div>', unsafe_allow_html=True)
     st.progress(hype_level)
     st.markdown(f"**Verdict:** {verdict}")
+    st.markdown(f"💡 **Hint:** {scenario_hint}")
+
+    # Acceleration estimates
+    st.markdown(
+        f"""
+        <div style="margin-top:6px;margin-bottom:4px;">
+            <span class="chip">0–100 km/h ≈ {zero_to_100:.1f} s</span>
+            <span class="chip">¼ mile ≈ {quarter_mile:.1f} s</span>
+        </div>
+        """,
+        unsafe_allow_html=True
+    )
 
     st.markdown("")
     st.bar_chart(
@@ -694,7 +732,9 @@ with right:
 st.markdown(
     """
     <div style="text-align:center;margin-top:10px;" class="muted">
-        Presets + rev limiter + neon dyno… if this doesn’t make people go mad, we can push it even further. 🔧🔥
+        For truly crazy UI (SVG rev gauges, 3D cars, cinema animations), 
+        this logic can be plugged into a React/Next.js front-end with Framer Motion, 
+        keeping Python as the ML API. For Streamlit though… this is already pretty wild. 🔧🔥
     </div>
     """,
     unsafe_allow_html=True