site: founding post, headline post layout, masonry grid, source links

- New "Why this exists" post; masthead "founded" links to it
- Post template: serif headline + date in masthead, "Filed under {category}" in footer
- Drop counts from footer Collections list
- Masonry component for home + sources grid; source badges link to /sources/#slug
- Theme toggle (settings page + cog) with dark-mode-aware tokens
- Six new themed find lists; cluster-finds skill

src/content/posts/2026-05-03-why-this-exists.mdx

@@ -0,0 +1,19 @@
+---
+title: "Why this exists"
+date: 2026-05-03
+category: meta
+tags: [meta, founding]
+description: "A note on why I started Unique — a small log of delightful, unique things to make life a little more pleasant."
+---
+
+I kept losing them.
+
+The clever little tool a friend mentioned in passing. The strange website I bookmarked at midnight and never found again. The kitchen gadget that turned out to be quietly perfect. The app that fixed something I didn't realize was broken.
+
+I'd find something delightful, smile at it for a moment, and then watch it slip back into the internet, indistinguishable from everything else. A few weeks later I'd be half-remembering a name, half-describing a thing, opening twelve tabs to chase a feeling.
+
+So this site is the fix. A small, slow log of things that made life a little more pleasant — products, apps, phenomena, oddities. Nothing comprehensive, nothing exhaustive. Just the ones worth keeping.
+
+I'm building it for myself first. If it's useful to you too, that's a bonus.
+
+Welcome.