fix(approve modal): break infinite loop from openNonce in effect deps

The ApproveAndSendDialog had a useEffect whose deps array included
`openNonce` — a state counter the effect itself incremented:

    useEffect(() => {
      if (!open) return;
      setOpenNonce((n) => n + 1);   // updates openNonce
      // ... seed defaults ...
    }, [open, openNonce, ...]);    // openNonce is in deps

This produced Maximum update depth exceeded: the effect fires → state
updates → deps change → effect re-fires → loop, until React pulls the
plug.

The intent was 'seed once per open cycle, not on every claimerName /
repEmail update' (so async lookups arriving after the modal opened
didn't clobber operator edits). The state-counter approach was the
wrong mechanism for that — mutating a dep from inside the effect
*is* the loop.

Fix: replace openNonce (state) with seededFor (ref). A ref mutation
doesn't trigger re-render, so the loop is impossible. We still depend
on [open, quote.id] in the effect, and the ref's purpose is purely
'has this (open, quote.id) cycle been seeded yet?'. Reset to null on
open=false so the next open seeds fresh.

Dropped claimerName / repEmail from the deps too — they were the
reason openNonce existed in the first place (don't re-seed when they
update), and the ref now enforces that without the side-effect trap.

Tests: 229/230 vitest (the 1 failure is the pre-existing attachments
off-by-one, unrelated to this change).

src/app/(app)/quotes/[id]/page.tsx

@@ -3065,15 +3065,23 @@ function ApproveAndSendDialog({
   /* eslint-enable react-hooks/set-state-in-effect */
 
   // Initial form state — set when the modal opens, persisted when it
-  // submits. We use a single open-counter so the effect runs ONCE per
-  // open and not on every quote re-render.
+  // submits. We seed ONCE per open cycle (not on every claimerName /
+  // repEmail update) so async lookups that arrive after the modal
+  // opens don't clobber the operator's in-progress edits.
   const [sendEmail, setSendEmail] = useState(true);
   const [cc, setCc] = useState("");
   const [bcc, setBcc] = useState("");
   const [subject, setSubject] = useState("");
   const [message, setMessage] = useState("");
   const [attachAuthLetters, setAttachAuthLetters] = useState(true);
-  const [openNonce, setOpenNonce] = useState(0);
+  // Tracks which (open, quote.id) cycle the form has been seeded for.
+  // Reset to null whenever `open` is false so the next open seeds
+  // fresh. We use a ref (not state) because mutating it shouldn't
+  // re-trigger this effect — and critically, we don't include it in
+  // the deps array (an earlier version used `openNonce` as a state
+  // counter, but incrementing a state value inside an effect that's
+  // dep'd on it produced an infinite loop).
+  const seededFor = useRef<string | null>(null);
   // Track which attachments the operator wants to send. We pre-check
   // all of them (PDF + every outbound file); unchecking removes from
   // the outbound set.
@@ -3081,13 +3089,18 @@ function ApproveAndSendDialog({
 
   /* eslint-disable react-hooks/set-state-in-effect, react-hooks/exhaustive-deps */
   useEffect(() => {
-    if (!open) return;
-    setOpenNonce((n) => n + 1);
+    if (!open) {
+      // Reset the seed marker so the next open seeds fresh defaults.
+      seededFor.current = null;
+      return;
+    }
+    // Seed exactly once per (open, quote.id) cycle. Subsequent prop
+    // updates (claimerName arriving async, repEmail refreshing, etc.)
+    // intentionally do NOT re-seed — the operator's edits win.
+    if (seededFor.current === quote.id) return;
+    seededFor.current = quote.id;
     // Seed defaults from the quote (persisted overrides win, then
-    // fall back to customer/rep-derived values). We intentionally
-    // don't depend on every `quote.*` field — we want to seed once
-    // when the modal opens, not re-clobber the operator's edits
-    // when something else updates the quote row.
+    // fall back to customer/rep-derived values).
     const customer = quote.expand?.customer;
     const buyerEmail = (customer?.buyer_email || "").trim();
     setCc(quote.email_cc || buyerEmail);
@@ -3107,7 +3120,7 @@ function ApproveAndSendDialog({
     );
     setAttachAuthLetters(quote.attach_auth_letters !== false);
     setSendEmail(true);
-  }, [open, openNonce, quote.id, claimerName, repEmail]);
+  }, [open, quote.id]);
   /* eslint-enable react-hooks/set-state-in-effect, react-hooks/exhaustive-deps */
 
   // Pre-select all outbound attachments when they change. We only