MAINT-11 round 2: disable the cycle buttons that cannot work

Stop cycle is disabled on a battery that is not cycling. Start cycle is
disabled while any battery cycles and on a switched-off battery. Page only;
the add-on still refuses each of these. DECISIONS notes the one-battery case.

Co-Authored-By: Claude <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Bdqr7PiaHcBnzPituu2yTC

goodwe_controller/DECISIONS/MAINT-11-cycle-per-battery.md

@@ -32,3 +32,6 @@ queues by waiting time, so nothing is lost.
   (SAFETY-73); its drain waits. The per-battery start does the same.
 - A start on the battery that is already cycling is refused as "busy", where
   the bare button restarts its drain. The bare button is unchanged.
+- At one battery, a request that names the battery uses the new path, so a
+  second start is refused instead of restarting the drain. Nothing sends a name
+  at one battery, and the bare request is unchanged.

goodwe_controller/app/static/app.js

@@ -352,15 +352,22 @@
     finally { packBusy = false; }
     await refresh(true);
   }
+  // A button that cannot work is disabled (the add-on still refuses it): Stop
+  // needs this battery cycling; Start needs no battery cycling and this one on.
+  function cycleState(b) {
+    const cycling = (x) => x.maintenance !== "idle";
+    return { start: !S.batteries.some(cycling) && b.use !== false, abort: cycling(b) };
+  }
   function cycleButtons(b, i) {
+    const can = cycleState(b);
     const ask1 = (key, what) => () => {
       const w = t("batteries.cycle." + key);
       ask({ name: say(w.name, { name: b.name }), description: say(w.description, { name: b.name }), yes: w.yes },
           () => cycleAct(what, b));
     };
     return h("div", { class: "cyc", style: "display:flex;gap:8px;flex-wrap:wrap;margin-top:10px" },
-      h("button", { type: "button", class: "btn", id: "bcs-" + i, onclick: ask1("start_dialog", "maint_start") }, t("batteries.cycle.start")),
+      h("button", { type: "button", class: "btn", id: "bcs-" + i, disabled: !can.start, onclick: ask1("start_dialog", "maint_start") }, t("batteries.cycle.start")),
-      h("button", { type: "button", class: "btn danger", id: "bca-" + i, onclick: ask1("abort_dialog", "maint_abort") }, t("batteries.cycle.abort")));
+      h("button", { type: "button", class: "btn danger", id: "bca-" + i, disabled: !can.abort, onclick: ask1("abort_dialog", "maint_abort") }, t("batteries.cycle.abort")));
   }
   function onSwitch(b, i, where, lid) {
     const sw = h("button", { type: "button", class: "switch", role: "switch", id: "bsw-" + where + i,

goodwe_controller/test_maint11.py

@@ -365,6 +365,15 @@ check("both buttons post the battery's name and ask first",
 check("a refusal is shown in the page's language, by its code",
       'const own = j.code && t("batteries.cycle." + j.code);' in JS
       and 'toast(own ? say(own.description' in JS)
+check("Stop is disabled on a battery that is not cycling",
+      'abort: cycling(b) };' in JS and "disabled: !can.abort" in JS)
+check("Start is disabled while any battery cycles",
+      "start: !S.batteries.some(cycling) && " in JS
+      and "disabled: !can.start" in JS)
+check("Start is disabled on a switched-off battery (use false, modes on)",
+      "&& b.use !== false, abort" in JS)
+check("a battery counts as cycling when its phase is not idle",
+      'cycling = (x) => x.maintenance !== "idle"' in JS)
 check("the old header buttons still post a bare request",
       'ask("maint_start", () => simple("maint_start"))' in JS
       and "body: JSON.stringify({ action: what }) });" in JS)