feat(projects): explicit organization (executor) selector

Backend:
- POST /api/projects accepts optional organizationId; default = active org
- GET /api/projects (list) and GET /:id include organization {id,name,shortName}
- /:id and /:id/documents no longer filter by active org — direct link works
  across organizations; UI offers to switch active to project's org

Frontend:
- Project create modal: «Фирма (исполнитель)» dropdown, default = active
- Projects list shows «Фирма» column when user has >1 organization
- ProjectEdit shows org-banner with project's organization;
  if active org differs, banner has «переключить активную на эту →» button
- ProjectEdit fetches BankAccounts from project's org (not active)
- Bumped clients fetch limit to 1000 to match API max

Org of an existing project cannot be changed (would orphan documents/lines);
to switch fenced — create new project under desired org.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

apps/web/src/pages/ProjectEdit.tsx

@@ -37,14 +37,14 @@ export function ProjectEditPage() {
   const [saving, setSaving] = useState(false);
   const [savedAt, setSavedAt] = useState<Date | null>(null);
   const [error, setError] = useState<string | null>(null);
-  const [orgId, setOrgId] = useState<string | null>(null);
+  const [activeOrgId, setActiveOrgId] = useState<string | null>(null);
 
   useEffect(() => {
     if (!id) return;
     void Promise.all([
       api.get<Project>(`/api/projects/${id}`),
       api.get<{ items: DocumentSummary[] }>(`/api/projects/${id}/documents`),
-      api.get<{ items: Client[] }>('/api/clients?limit=500'),
+      api.get<{ items: Client[] }>('/api/clients?limit=1000'),
       api.get<{ items: DocumentTemplate[] }>('/api/templates'),
       api.get<{ id: string }>('/api/active-organization'),
     ])
@@ -54,13 +54,26 @@ export function ProjectEditPage() {
         setDocs(ds.items);
         setClients(cs.items);
         setTemplates(ts.items);
-        setOrgId(ao.id);
-        const ba = await api.get<{ items: BankAccount[] }>(`/api/organizations/${ao.id}/bank-accounts`);
+        setActiveOrgId(ao.id);
+        // Банк-счета и шаблоны проекта берём из ФИРМЫ ПРОЕКТА, а не из активной.
+        const ba = await api.get<{ items: BankAccount[] }>(
+          `/api/organizations/${p.organizationId}/bank-accounts`,
+        );
         setBankAccounts(ba.items);
       })
       .catch((e) => setError(String(e)));
   }, [id]);
 
+  async function switchToProjectOrg() {
+    if (!project) return;
+    try {
+      await api.post('/api/active-organization', { id: project.organizationId });
+      window.location.reload();
+    } catch (e) {
+      setError(String(e));
+    }
+  }
+
   async function save() {
     if (!id || !draft) return;
     setSaving(true);
@@ -94,6 +107,8 @@ export function ProjectEditPage() {
   if (error && !project) return <main className="content"><div className="error-text">{error}</div></main>;
   if (!project) return <main className="content"><p className="hint">Загрузка…</p></main>;
 
+  const isCrossOrg = activeOrgId && project.organizationId && activeOrgId !== project.organizationId;
+
   return (
     <main className="content">
       <header className="page-head">
@@ -101,6 +116,16 @@ export function ProjectEditPage() {
         <Button onClick={() => navigate('/projects')}>← К проектам</Button>
       </header>
 
+      <div className="org-banner">
+        <span className="hint">Фирма-исполнитель:</span>
+        <b>{project.organization?.shortName || project.organization?.name || '—'}</b>
+        {isCrossOrg ? (
+          <Button variant="ghost" onClick={switchToProjectOrg}>
+            переключить активную на эту →
+          </Button>
+        ) : null}
+      </div>
+
       <section className="form-grid">
         <Field
           label="Название"