fix(ev): show pilot current in charging warnings

.changeset/ev-warning-pilot.md

@@ -0,0 +1,5 @@
+---
+"ftw": patch
+---
+
+Show requested current, charger pilot current and measured power in EV charging warnings when fresh pilot data is available.

web/chart-palette.test.mjs

@@ -33,6 +33,7 @@ async function drawHistory(days) {
   const legend = { innerHTML: "" };
   const els = { "energy-history-chart": canvas, "energy-history-legend": legend };
   const context = {
+    URLSearchParams,
     document: { getElementById: (id) => els[id] || null },
     window: {
       devicePixelRatio: 1,

web/control-feedback.js

@@ -111,9 +111,9 @@ function sentence(row) {
     case 'load_balancer_limit': return `${row.make ? `${row.make} limits the charger to ${amps(row.limit_a)} (its load balancing)`
       : `The charger’s load balancing limits it to ${amps(row.limit_a)}`}. FTW asked for ${amps(row.requested_a)}; the car takes ${controlPower(actual)}.`;
     case 'one_phase': return `The car charges on ${row.charging_phase || 'one phase'} only${num(row.charging_phase_max_w) ? `, at most ${controlPower(row.charging_phase_max_w)}` : ''}. FTW plans with what it takes.`;
-    case 'power_below_target': case 'power_above_target': return `Asked for ${target(row)}, delivering ${controlPower(actual)}.`;
+    case 'power_below_target': case 'power_above_target': return evPowerWarning(row) || `Asked for ${target(row)}, delivering ${controlPower(actual)}.`;
     case 'power_wrong_direction': return `Asked for ${target(row)}, but it is ${doing(row, actual)} ${controlPower(actual)}.`;
-    case 'no_power_response': return `Asked for ${target(row)}, but it delivers no power.`;
+    case 'no_power_response': return evPowerWarning(row) || `Asked for ${target(row)}, but it delivers no power.`;
     case 'power_while_idle': return `Asked to stay idle, but it is ${doing(row, actual)} ${controlPower(actual)}.`;
     case 'setpoint_changed': return `The ${name} reports a target of ${controlFlow(row, row.readback_w)}, not the ${target(row)} FTW sent.`;
     case 'device_fault': return row.device_reason ? `The ${name} reports a fault: ${row.device_reason}.` : `The ${name} reports a fault that stops control.`;
@@ -134,6 +134,14 @@ function sentence(row) {
   }
 }
 
+function evPowerWarning(row) {
+  if (row.kind !== 'ev' || !row.readings_fresh ||
+      !num(row.requested_a) || !num(row.pilot_a) || !num(row.actual_w)) return '';
+  const request = `FTW asked for ${amps(row.requested_a)}`;
+  const pilot = `the charger signalled ${amps(row.pilot_a)} to the car`;
+  return `${request} and ${pilot}. Measured charging: ${controlPower(row.actual_w)}.`;
+}
+
 function nextStep(row) {
   const name = noun(row);
   switch (row.reason) {

web/control-feedback.test.mjs

@@ -236,3 +236,16 @@ test('the plan and what happens now, in words', () => {
   assert.equal(planNowWords({...morning, why: 'other'}).why, 'FTW follows what the home and the sun do now, not the forecast.');
   assert.equal(planNowWords({...morning, planned_battery_w: -3000, battery_w: -1000, why: 'less_home'}).then, 'The battery gives only what the home needs.');
 });
+
+test('EV warnings show fresh pilot evidence with the measured charging power', () => {
+  const ev = row({kind: 'ev', status: 'not_following', severity: 'warning',
+    requested_a: 15, sent_w: 10350, pilot_a: 11, actual_w: 7489, reason: 'power_below_target'});
+  assert.equal(controlStatus(ev).text,
+    'FTW asked for 15 A and the charger signalled 11 A to the car. Measured charging: 7.5 kW.');
+  const stopped = {...ev, pilot_a: 12, actual_w: 0, reason: 'no_power_response'};
+  assert.equal(controlStatus(stopped).text,
+    'FTW asked for 15 A and the charger signalled 12 A to the car. Measured charging: 0 W.');
+  assert.equal(controlStatus(stopped).tone, 'warning');
+  assert.doesNotMatch(controlStatus({...stopped, readings_fresh: false}).text, /signalled/);
+  assert.doesNotMatch(controlStatus({...stopped, pilot_a: null}).text, /signalled/);
+});

web/style.css

@@ -191,7 +191,7 @@ header h1 {
 .energy-history-ev-cost span { color: var(--text-dim); font-size: 0.78rem; }
 .energy-history-ev-cost strong { font-size: 1.05rem; }
 .energy-history-ev-cost small { color: var(--text-dim); font-size: 0.7rem; }
-.energy-history-ev-cost .incomplete { color: var(--warning, #f59e0b); }
+.energy-history-ev-cost .incomplete { color: var(--alarm); }
 @media (max-width: 720px) {
   .energy-history-ev-cost { grid-template-columns: 1fr; }
 }