UX-13 P1 review: Home draws only what the cycle would do

- Trade blocks: none on a battery with no room, no sale at a negative price
  or while the emptiest battery is at arbitrage's floor, nothing when a
  level is unknown. A give after a charge may use what the charge put in.
- The refusal line names the real reason: prices not published vs gap.
- The plan's peak line uses the guard's ceiling (this month's peak once
  above the cap), as the peak card does.
- House below zero: 0 W inside the idle band, no figure beyond it.
- Price bars are "Low price" / "High price": the add-on trades in one hour.
- Control toggle: one request in flight at a time.
- test_home: the new cases; the house-sign mutation now goes red.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

goodwe_controller/app/ui_text/en.json

@@ -42,8 +42,8 @@
     "plan": {
       "name": "Today's plan",
       "description": "Point at a bar or a block for details, or tap it on a phone.",
-      "cheap": "Cheap hour",
-      "dear": "Expensive hour",
+      "cheap": "Low price",
+      "dear": "High price",
       "estimate": "Estimate",
       "grid": "Charges from the grid",
       "give": "Gives power",
@@ -53,8 +53,8 @@
       "now": "now",
       "time_to": "to",
       "per_kwh": "per kWh",
-      "cheap_tip": "a cheap hour",
-      "dear_tip": "an expensive hour",
+      "cheap_tip": "low for today",
+      "dear_tip": "high for today",
       "estimate_tip": "estimate from yesterday",
       "none_tip": "No price known",
       "no_prices": {"description": "No prices for today, so the chart shows only the plan."},