wohnungen: drive list info from LLM JSON, tidy header

- Each row's info line now uses the enrichment JSON (rooms, size_sqm,
  rent_total/rent_cold, wbs_required/wbs_type). When enrichment is still
  running we show "Infos werden abgerufen…", on failure "Fehler beim
  Abrufen der Infos"; the scraper fields are no longer rendered in the list
- Move the admin backfill button to the header row as a compact
  "Anreichern (N)" that only appears when there's pending/failed work,
  so it's findable right next to "X gefunden"
- Countdown wobble: new .countdown class forces tabular-nums + 4.2em
  min-width, so neighbours stop shifting every second
- Dot spacing: pull "·" out into its own .sep span so flex gap applies
  on both sides symmetrically

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

web/templates/base.html

@@ -48,6 +48,12 @@
                  transition: border-color .15s, box-shadow .15s; }
         .input:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(47,138,224,.18); }
         .chip { padding: .2rem .7rem; border-radius: 999px; font-size: .75rem; font-weight: 500; display: inline-block; }
+        /* Countdown — tabular digits + fixed width so the text doesn't wobble
+           while the seconds tick down (3 → 10 → 59 → 1 min). */
+        .countdown { font-variant-numeric: tabular-nums; display: inline-block;
+                     min-width: 4.2em; text-align: left; }
+        /* Neutral separator in flex rows so the '·' has equal gap on both sides. */
+        .sep { color: var(--muted); user-select: none; }
         .chip-ok   { background: #e4f6ec; color: #1f8a4a; border: 1px solid #b7e4c7; }
         .chip-warn { background: #fff4dd; color: #a36a1f; border: 1px solid #f5d48b; }
         .chip-bad  { background: #fde6e9; color: #b8404e; border: 1px solid #f5b5bf; }