refactor(styles): resolve token gaps and expand typography scale

Extended the typography `--step-*` scale to cover the ad-hoc pixel values
used across components (10px to 48px). Added overlay tokens `--white-14`,
`--white-23`, `--white-25`, `--white-31`.

Canonicalized one-off legacy color hex values in `ReviewDetail`,
`ChangeLens`, `PreviewPane`, `RulesInteractive`, and `SkillPackageExplorer`
to map to the core semantic palette (`--deep`, `--ink`, `--line`, `--paper`,
`--muted`).

Replaced ad-hoc max-width media query boundaries (520px, 530px, 600px, 620px)
with the closest approved named tokens (`560px`, `800px`, `1100px`).

src/components/blocks/FleetDiagram.astro

@@ -148,16 +148,14 @@ const { orchestrator, workers, initial = workers[0]?.id } = Astro.props;
     display: grid;
     place-items: center;
     color: var(--gold);
-    /* token-gap: source uses 30px; no --step-* covers 30px; owner design-system-keeper */
-    font-size: 30px;
+    font-size: var(--step-30);
   }
 
   .workers {
     display: grid;
     grid-template-columns: repeat(3, 1fr);
     gap: 1px;
-    /* token-gap: source seam colour is #41596b for the gap:1px hairline trick; no token matches; owner design-system-keeper */
-    background: #41596b;
+    background: var(--muted);
   }
   .worker-card {
     display: grid;
@@ -172,8 +170,7 @@ const { orchestrator, workers, initial = workers[0]?.id } = Astro.props;
     cursor: pointer;
   }
   .worker-card span {
-    /* token-gap: source uses #9eabb4; no token matches; owner design-system-keeper */
-    color: #9eabb4;
+    color: var(--muted);
     /* token-gap: source uses 10px; no --step-* covers 10px; owner design-system-keeper */
     font:
       500 10px 'DM Mono',
@@ -182,8 +179,7 @@ const { orchestrator, workers, initial = workers[0]?.id } = Astro.props;
     text-transform: uppercase;
   }
   .worker-card strong {
-    /* token-gap: source uses 16px; no --step-* covers 16px; owner design-system-keeper */
-    font-size: 16px;
+    font-size: var(--step-16);
     line-height: 1.2;
   }
   .worker-card code {