refactor(ui): --pill-radius CSS-Variable (Item F)

border-radius: 999px war 15x im CSS dupliziert. Ausgelagert als
:root --pill-radius Variable im globalen :root-Block in +layout.svelte,
Call-Sites auf var(--pill-radius) umgestellt.

Bewusst NICHT angefasst (plan war "nur Werte die mehrfach vorkommen"):
- z-index: 10 Distinct Values in 14 Sites, bilden ein implizites
  Layer-System. Konsolidieren = behavior-change-Risiko ohne konkreten
  Nutzen. Wenn kuenftig einheitliche Modal-/Popover-Layer noetig,
  separate Phase.
- setTimeout(): 3 Sites, jeder mit eigener Semantik (Debounce/Print/
  Spinner). Kein DRY-Nutzen durch Extraktion.

Gate: svelte-check 0 Warnings, 184/184 Tests, Build clean, kein
sichtbarer Unterschied (einzige Aenderung: selber Wert ueber Variable).

Refs docs/superpowers/plans/2026-04-19-post-review-roadmap.md Item F.

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

src/lib/components/ProfileSwitcher.svelte

@@ -99,7 +99,7 @@
     align-items: center;
     gap: 0.4rem;
     padding: 0.5rem 0.9rem;
-    border-radius: 999px;
+    border-radius: var(--pill-radius);
     border: 1px solid #cfd9d1;
     background: white;
     font-size: 0.95rem;

src/lib/components/RecipeView.svelte

@@ -204,7 +204,7 @@
   .pill {
     padding: 0.15rem 0.55rem;
     background: #eaf4ed;
-    border-radius: 999px;
+    border-radius: var(--pill-radius);
     font-size: 0.8rem;
     color: #2b6a3d;
   }

src/lib/components/SyncIndicator.svelte

@@ -77,7 +77,7 @@
     padding: 0.3rem 0.65rem;
     background: white;
     border: 1px solid #cfd9d1;
-    border-radius: 999px;
+    border-radius: var(--pill-radius);
     color: #555;
     font-size: 0.78rem;
     cursor: pointer;

src/lib/components/UpdateToast.svelte

@@ -28,7 +28,7 @@
     padding: 0.6rem 0.85rem 0.6rem 1.1rem;
     background: #1a1a1a;
     color: white;
-    border-radius: 999px;
+    border-radius: var(--pill-radius);
     box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
     z-index: 500;
     max-width: calc(100% - 2rem);
@@ -58,7 +58,7 @@
     background: #2b6a3d;
     color: white;
     border: 0;
-    border-radius: 999px;
+    border-radius: var(--pill-radius);
     font-size: 0.88rem;
     cursor: pointer;
     font-weight: 600;
@@ -75,7 +75,7 @@
     padding: 4px;
     display: inline-flex;
     align-items: center;
-    border-radius: 999px;
+    border-radius: var(--pill-radius);
     flex-shrink: 0;
   }
   .dismiss:hover {

src/routes/+layout.svelte

@@ -386,6 +386,9 @@
 </main>
 
 <style>
+  :global(:root) {
+    --pill-radius: 999px;
+  }
   :global(html, body) {
     margin: 0;
     padding: 0;
@@ -429,7 +432,7 @@
     justify-content: center;
     width: 40px;
     height: 40px;
-    border-radius: 999px;
+    border-radius: var(--pill-radius);
     color: #2b6a3d;
     text-decoration: none;
     flex-shrink: 0;
@@ -621,7 +624,7 @@
     justify-content: center;
     width: 40px;
     height: 40px;
-    border-radius: 999px;
+    border-radius: var(--pill-radius);
     text-decoration: none;
     font-size: 1.15rem;
     position: relative;
@@ -636,7 +639,7 @@
     min-width: 18px;
     height: 18px;
     padding: 0 5px;
-    border-radius: 999px;
+    border-radius: var(--pill-radius);
     background: #c53030;
     color: white;
     font-size: 0.7rem;

src/routes/+page.svelte

@@ -653,7 +653,7 @@
     padding: 0.4rem 0.85rem;
     background: white;
     border: 1px solid #cfd9d1;
-    border-radius: 999px;
+    border-radius: var(--pill-radius);
     color: #2b6a3d;
     font-size: 0.88rem;
     cursor: pointer;
@@ -760,7 +760,7 @@
     right: 0.4rem;
     width: 28px;
     height: 28px;
-    border-radius: 999px;
+    border-radius: var(--pill-radius);
     border: 0;
     background: rgba(255, 255, 255, 0.9);
     color: #444;

src/routes/admin/+layout.svelte

@@ -42,7 +42,7 @@
     padding: 0.5rem 0.95rem 0.5rem 0.8rem;
     background: white;
     border: 1px solid #e4eae7;
-    border-radius: 999px;
+    border-radius: var(--pill-radius);
     text-decoration: none;
     color: #444;
     font-size: 0.95rem;

src/routes/admin/profiles/+page.svelte

@@ -185,7 +185,7 @@
     padding: 0.15rem 0.5rem;
     background: #eaf4ed;
     color: #2b6a3d;
-    border-radius: 999px;
+    border-radius: var(--pill-radius);
     font-size: 0.75rem;
   }
   .actions {

src/routes/recipes/+page.svelte

@@ -441,7 +441,7 @@
     padding: 0.6rem 0.9rem;
     font-size: 0.95rem;
     border: 1px solid #cfd9d1;
-    border-radius: 999px;
+    border-radius: var(--pill-radius);
     background: white;
     min-height: 44px;
   }

src/routes/wishlist/+page.svelte

@@ -185,7 +185,7 @@
     padding: 0.4rem 0.85rem;
     background: white;
     border: 1px solid #cfd9d1;
-    border-radius: 999px;
+    border-radius: var(--pill-radius);
     color: #2b6a3d;
     font-size: 0.88rem;
     cursor: pointer;