fix(crm): inquiry detail polish, EOI preview mime, EOI next-step, documenso v1 banner

- inquiries: format triage badges with labels (Open/Assigned/Converted/Dismissed),
  surface the lead's free-text message for every kind, and gate the raw-payload
  tab to super admins (was exposing raw JSON to all users)
- file preview: fall back to the server-resolved mime (getPreviewUrl already
  returns it) so files whose stored name lacks a .pdf extension — e.g.
  migration-backfilled signed EOIs — render instead of "preview not supported"
- interest overview: a signed EOI left at stage=eoi no longer shows as
  "NEXT STEP"; completion ordering rolls the next step to Reservation (display
  only, no pipeline_stage change)
- documenso admin: warning banner discouraging the deprecated v1 API + what
  breaks on it

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

src/app/(dashboard)/[portSlug]/admin/documenso/page.tsx

@@ -7,6 +7,7 @@ import { TemplateSyncButton } from '@/components/admin/documenso/template-sync-b
 import { WebhookHealthCard } from '@/components/admin/documenso/webhook-health-card';
 import { PageHeader } from '@/components/shared/page-header';
 import { Card, CardContent, CardHeader, CardTitle } from '@/components/ui/card';
+import { WarningCallout } from '@/components/ui/warning-callout';
 
 // All field arrays removed - every Documenso setting now flows through
 // `RegistryDrivenForm`, which surfaces the env-fallback / port / global
@@ -22,6 +23,35 @@ export default function DocumensoSettingsPage() {
         description="API credentials, signer identities, templates, and signing behaviour for every document the CRM puts out for signature (EOI, reservation, contract, custom uploads). Use the test-connection button to verify a saved configuration before relying on it."
       />
 
+      <WarningCallout title="Use Documenso v2, not v1 (v1 API is deprecated)">
+        <p>
+          The CRM&apos;s signing features are built for Documenso 2.x (v2). Set the API version
+          below to <strong>v1</strong> only if this port still points at a Documenso 1.13.x server.
+          Be aware these CRM functions <strong>do not work (or run degraded)</strong> on v1:
+        </p>
+        <ul className="ms-4 mt-1 list-disc space-y-1">
+          <li>
+            <strong>Editing an envelope after it is created</strong> (title, subject, redirect URL):
+            hard-fails, because v1 has no <code>/envelope/update</code> endpoint.
+          </li>
+          <li>
+            <strong>Upload-and-send contracts / reservations</strong> fall back to v1&apos;s
+            per-field placement: page size is assumed to be A4, and rich field metadata (required
+            flags, NUMBER min/max, CHECKBOX / DROPDOWN / RADIO option lists) is dropped.
+          </li>
+          <li>
+            <strong>One-call send with per-recipient signing links</strong>,{' '}
+            <strong>sequential signing enforcement</strong>, and the{' '}
+            <strong>v2 webhook events</strong> (recipient viewed / signed, declined, reminder sent)
+            are unavailable or ignored on v1.
+          </li>
+        </ul>
+        <p className="mt-1">
+          Recommended: upgrade the Documenso server to 2.x, then set the API version to v2 and run
+          the test-connection button to confirm.
+        </p>
+      </WarningCallout>
+
       <Card>
         <CardHeader>
           <CardTitle className="flex items-center gap-2 text-base">