style(design): consistency sweep + UX upgrades

- Palette: gray/zinc/slate/neutral → stein, red → fire, amber → erde,
  sky → himmel, green → wald
- Footer: replaced raw rgb with stein tokens
- Radius: unified to rounded-xs across cards, buttons, inputs, pagination
- Buttons: .btn-primary/.btn-secondary now font-medium; added secondary
- Card hover: -translate-y-0.5 + shadow + wald-300 border
- Header active link: wald border-bottom + wald-700 text
- Mobile nav: bigger touch targets + wald active accent
- Pagination: prev/next text labels + wald-500 active state with
  separated shape/color classes to avoid Tailwind conflicts
- Lead paragraph: scoped .markdown > p:first-child for top-level
  MarkdownBlock only via [data-block-type="markdown"]
- Section dividers: subtle wald-200 gradient between content rows
- Global focus-visible ring (wald-500)
- Inline hex → palette tokens (Badge amber, Tag custom-color contrast)
- Font weights snapped to design system (300/400/500/600/700)
- transition-all → transition-colors where only color changes
- Removed em-dashes from user-visible templates

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

src/lib/iconify-mdi-subset.generated.json

@@ -81,6 +81,12 @@
     "transmission-tower": {
       "body": "<path fill=\"currentColor\" d=\"m8.28 5.45l-1.78-.9L7.76 2h8.47l1.27 2.55l-1.78.89L15 4H9zM18.62 8h-4.53l-.79-3h-2.6l-.79 3H5.38L4.1 10.55l1.79.89l.73-1.44h10.76l.72 1.45l1.79-.89zm-.85 14H15.7l-.24-.9L12 15.9l-3.47 5.2l-.23.9H6.23l2.89-11h2.07l-.36 1.35L12 14.1l1.16-1.75l-.35-1.35h2.07zm-6.37-7l-.9-1.35l-1.18 4.48zm3.28 3.12l-1.18-4.48l-.9 1.36z\"/>"
     },
+    "database-outline": {
+      "body": "<path fill=\"currentColor\" d=\"M12 3C7.58 3 4 4.79 4 7v10c0 2.21 3.59 4 8 4s8-1.79 8-4V7c0-2.21-3.58-4-8-4m6 14c0 .5-2.13 2-6 2s-6-1.5-6-2v-2.23c1.61.78 3.72 1.23 6 1.23s4.39-.45 6-1.23zm0-4.55c-1.3.95-3.58 1.55-6 1.55s-4.7-.6-6-1.55V9.64c1.47.83 3.61 1.36 6 1.36s4.53-.53 6-1.36zM12 9C8.13 9 6 7.5 6 7s2.13-2 6-2s6 1.5 6 2s-2.13 2-6 2\"/>"
+    },
+    "alert-circle": {
+      "body": "<path fill=\"currentColor\" d=\"M13 13h-2V7h2m0 10h-2v-2h2M12 2A10 10 0 0 0 2 12a10 10 0 0 0 10 10a10 10 0 0 0 10-10A10 10 0 0 0 12 2\"/>"
+    },
     "cloud-off-outline": {
       "body": "<path fill=\"currentColor\" d=\"M19.8 22.6L17.15 20H6.5q-2.3 0-3.9-1.6T1 14.5q0-1.92 1.19-3.42q1.19-1.51 3.06-1.93q.08-.2.15-.39q.1-.19.15-.41L1.4 4.2l1.4-1.4l18.4 18.4M6.5 18h8.65L7.1 9.95q-.05.28-.07.55q-.03.23-.03.5h-.5q-1.45 0-2.47 1.03Q3 13.05 3 14.5T4.03 17q1.02 1 2.47 1m15.1.75l-1.45-1.4q.43-.35.64-.81T21 15.5q0-1.05-.73-1.77q-.72-.73-1.77-.73H17v-2q0-2.07-1.46-3.54Q14.08 6 12 6q-.67 0-1.3.16q-.63.17-1.2.52L8.05 5.23q.88-.6 1.86-.92Q10.9 4 12 4q2.93 0 4.96 2.04Q19 8.07 19 11q1.73.2 2.86 1.5q1.14 1.28 1.14 3q0 1-.37 1.81q-.38.84-1.03 1.44m-6.77-6.72\"/>"
     },