feat(tracking): Meta Pixel behind cookie consent

- Meta Pixel (2453598878495749) loads only after the visitor clicks Accept;
  choice stored in localStorage (ibo-consent).
- Decline after a previous Accept clears _fbp/_fbc and reloads.
- "Cookie settings" link in the footer reopens the banner.
- Privacy page: removed "no tracking cookies", added Meta Pixel section.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

scripts/backfill.mjs

@@ -0,0 +1,32 @@
+// Engangsjobb: skapa -s (800px) och -m (1600px) for redan synkade portfolio-bilder.
+// Kallan ar den befintliga 3000px-filen i repot - ingen ny nedladdning fran Immich.
+import fs from "node:fs";
+import path from "node:path";
+import sharp from "sharp";
+
+const DIR = "src/assets/images/portfolio";
+const SIZES = [{ suffix: "-s", dim: 800 }, { suffix: "-m", dim: 1600 }];
+const QUALITY = 88;
+
+const files = fs.readdirSync(DIR).filter(
+  (f) => /^immich-[0-9a-f-]{36}-/i.test(f) && /\.jpg$/i.test(f) && !/-[sm]\.jpg$/i.test(f)
+);
+console.log(`hittade ${files.length} large-bilder`);
+
+let skapade = 0, hoppade = 0;
+for (const f of files) {
+  const src = path.join(DIR, f);
+  const base = src.replace(/\.jpg$/i, "");
+  for (const { suffix, dim } of SIZES) {
+    const dest = `${base}${suffix}.jpg`;
+    if (fs.existsSync(dest)) { hoppade++; continue; }
+    await sharp(src)
+      .rotate()
+      .resize(dim, dim, { fit: "inside", withoutEnlargement: true })
+      .withMetadata()
+      .jpeg({ quality: QUALITY })
+      .toFile(dest);
+    skapade++;
+  }
+}
+console.log(`klart: ${skapade} skapade, ${hoppade} fanns redan`);