fix: plate calculator only shown for barbell/trap bar/EZ bar exercises

Author: bndct-devops

TODO.md

@@ -61,6 +61,7 @@
 - **CI: explicit frontend build job** — add `npm ci && npm run build` step before `build-and-push` for faster, cheaper feedback on broken JSX/imports (currently only caught inside the Docker build)
 
 ### UX / missing features
+- **Interactive charts (touch tooltips)** — SVG `onTouchMove`/`onMouseMove` handler computes nearest data point from touch X, renders floating tooltip bubble; covers bodyweight line, weekly volume bars, muscle donut, per-exercise 1RM line; no new dependency needed; pan/zoom out of scope
 - **JSON backup / restore** — full JSON dump of exercises + workouts + sets per profile; CSV export exists but can't be re-imported; needed for migrating between instances
 - **System theme auto-follow** — "System" option in theme picker reads `prefers-color-scheme` and maps to Light/Dark; single media query, no backend change
 - **Exercise picker: body part filter chips** — horizontal scrollable chip row (All / Chest / Back / …) above the list in the add-exercise bottom sheet; reuses existing filter logic from Exercises tab

frontend/src/ActiveWorkoutView.jsx

@@ -560,8 +560,8 @@ export default function ActiveWorkoutView({ workout, exercises, sessionSets, onF
                             onAnimationEnd={() => setLogPulseActive(false)}><Check size={18} strokeWidth={2.5} /></button>
                         </div>
                       )}
-                      {/* Plate calculator */}
-                      {isActive && plateCalc && (() => {
+                      {/* Plate calculator — barbell / trap bar / EZ bar only */}
+                      {isActive && plateCalc && /barbell|trap bar|ez bar/i.test(ex.equipment || '') && (() => {
                         const wKg = parseWeight(weight, unit)
                         if (!wKg || wKg <= 0) return null
                         const BAR_KG = unit === 'lbs' ? 20.4116 : 20