fixes: image-url proxy + raw-publish fallback on rewrite failure

1. Clean image URLs
   Article HTML was leaking the full Supabase Storage URL:
     https://supabase.onsethost.com/storage/v1/object/public/distribute-media/<uuid>/<file>
   Now rewritten on render to:
     /img/distribute-media/<uuid>/<file>
   Served by new /img/[...path] route handler that proxies to Supabase
   with 24h public cache + 7d SWR. Better SEO (first-party images) and
   stops leaking the storage host into article markup.

2. Stuck PR submissions
   When the rewrite pipeline fails (Ollama 503 / bad model output), the
   submission used to sit forever in ai_original_submissions without
   becoming a public wp_imported_posts row. PR firms got "delivered"
   status with no visible article anywhere.

   /api/ai/submit now calls publishRawFallback() if rewriteSubmission
   returns anything other than 'succeeded'. The fallback inserts a
   wp_imported_posts row containing the raw HTML body with a visible
   "Distributed as a press release — staff editorial rewrite pending"
   banner at the top, so the article surfaces immediately. A future
   retry job can swap in the rewritten content when Ollama recovers.

src/app/api/ai/submit/route.ts

@@ -1,6 +1,7 @@
 import { NextRequest, NextResponse } from "next/server";
 import { ingestRawSubmission, rewriteSubmission } from "@/lib/ai/rewrite-pipeline";
 import { findViolations } from "@/lib/disallowed-phrases-guard";
+import { publishRawFallback } from "@/lib/ai/publish-raw-fallback";
 
 export const runtime = "nodejs";
 export const maxDuration = 300;
@@ -117,7 +118,24 @@ export async function POST(req: NextRequest) {
     const submissionId = await ingestRawSubmission(payload);
     const outcome = await rewriteSubmission({ submissionId, personaSlug: payload.personaSlug });
 
-    return NextResponse.json({ ok: true, submissionId, outcome });
+    // If the rewrite failed (Ollama 503 / model output bad), publish the raw
+    // press release with a "rewrite pending" notice so the submission is at
+    // least visible. Without this, PR-firm submissions disappear when Ollama
+    // is saturated.
+    let fallback: { wp_id: number; wp_slug: string } | null = null;
+    if (outcome.status !== "succeeded") {
+      const meta: any = payload.metadata || {};
+      fallback = await publishRawFallback({
+        submissionId,
+        rawTitle: payload.rawTitle,
+        rawHtml: payload.rawHtml || null,
+        rawContent: payload.rawContent,
+        contributorName: payload.contributorName || null,
+        featuredImageUrl: typeof meta.featured_image_url === "string" ? meta.featured_image_url : null,
+      });
+    }
+
+    return NextResponse.json({ ok: true, submissionId, outcome, raw_fallback: fallback });
   } catch (err: any) {
     return NextResponse.json({ error: err.message || String(err) }, { status: 500 });
   }