capabilities: proof-points fill the tall tiles; headers rebalanced to the flagship weight

The hero and full-row tiles stretched to their grid height with nothing
between blurb and chips - reading as missing body. Adds a points field
rendered as accent-dashed proof lines (flagship gets four, observability
three), each grounded in the running estate. Category titles step up to
23px/700 with the flagship at 30px so the hierarchy holds.

src/components/SkillGroup.astro

@@ -25,6 +25,13 @@ const spanClass =
   {group.flag && <p class="tile__flag mono">{group.flag}</p>}
   <h3 class="tile__title">{group.title}</h3>
   <p class="tile__blurb">{group.blurb}</p>
+  {group.points && (
+    <ul class="tile__points" role="list">
+      {group.points.map((point) => (
+        <li>{point}</li>
+      ))}
+    </ul>
+  )}
   <ul class="tile__chips mono" role="list">
     {group.items.map((item) => (
       <li class:list={["chip", group.span === "hero" && "chip--lit"]}>{item}</li>
@@ -97,12 +104,12 @@ const spanClass =
     position: relative;
     margin: 0;
     font-family: var(--font-display);
-    font-size: 19px;
-    font-weight: 600;
+    font-size: 23px;
+    font-weight: 700;
     color: var(--text-strong);
   }
   .tile--hero .tile__title {
-    font-size: 26px;
+    font-size: 30px;
   }
   .tile__blurb {
     position: relative;
@@ -118,6 +125,39 @@ const spanClass =
     max-width: 420px;
   }
 
+  .tile__points {
+    position: relative;
+    list-style: none;
+    display: flex;
+    flex-direction: column;
+    gap: 10px;
+    margin: 6px 0 0;
+    padding: 0;
+    font-size: 13.5px;
+    line-height: 1.55;
+    color: var(--text-dim);
+  }
+  .tile__points li {
+    padding-left: 18px;
+    position: relative;
+    text-wrap: pretty;
+  }
+  .tile__points li::before {
+    content: "";
+    position: absolute;
+    left: 0;
+    top: 0.55em;
+    width: 8px;
+    height: 2px;
+    background: linear-gradient(90deg, var(--accent), var(--accent-2));
+    border-radius: 1px;
+  }
+  .tile--hero .tile__points {
+    font-size: 14.5px;
+    gap: 12px;
+    max-width: 460px;
+  }
+
   .tile__chips {
     position: relative;
     list-style: none;