fix(article): remove drop-cap + match link color/font to body text

Two complaints on /news/[slug]:
- the oversized first-letter drop-cap looked editorial-magazine, not in
  spec — first paragraph should start as normal prose
- inline links rendered near-white against the white page because
  Tailwind Typography's prose-a variable was overriding the (no-!important)
  brand-blue rule, leaving ghost links unreadable

Drop the ::first-letter rule entirely. Force link color to #1e293b body,
font-family to inherit, and decoration color to currentColor so the
underline is the only visual link cue (still WCAG-distinguishable
without relying on color). Hover keeps brand blue.

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

src/styles/tailwind.css

@@ -1606,16 +1606,6 @@ a.company-mention:hover {
   line-height: 1.6;
   color: #1e293b;
 }
-.bb-article-prose p:first-of-type::first-letter {
-  float: left;
-  font-family: var(--font-sans), sans-serif;
-  font-size: 64px;
-  line-height: 0.95;
-  font-weight: 700;
-  color: #0F172A;
-  padding: 6px 10px 0 0;
-  margin-top: 4px;
-}
 .bb-article-prose h2 {
   font-family: var(--font-sans), sans-serif;
   font-size: 28px;
@@ -1652,16 +1642,22 @@ a.company-mention:hover {
   margin-right: 0.15em;
   opacity: 0.55;
 }
+/* Inline article links: same color + font as body so they don't look like
+   pale ghost links against the white page. Underline is the only visual
+   cue that distinguishes a link from prose — required for accessibility
+   (links must be identifiable by more than color alone). !important
+   defeats Tailwind Typography's `prose-a` variable which otherwise wins. */
 .bb-article-prose a {
-  color: #1D4ED8;
+  color: #1e293b !important;
+  font-family: inherit !important;
   text-decoration: underline;
-  text-decoration-color: rgba(0, 212, 255, 0.5);
+  text-decoration-color: currentColor;
   text-underline-offset: 3px;
   text-decoration-thickness: 1px;
   transition: color 120ms ease, text-decoration-color 120ms ease;
 }
 .bb-article-prose a:hover {
-  color: #1D4ED8;
+  color: #1D4ED8 !important;
   text-decoration-color: #1D4ED8;
 }
 .bb-article-prose figure {