fix: position copy button top-right and always visible in code blocks

- Override EC's large --button-spacing for untitled terminal frames,
  which was pushing the copy button into/past the bottom of short blocks
- Directly set inset-block-start and inset-inline-end on .copy for all
  untitled frames (0.5rem each) so the button sits cleanly inside the
  top-right corner regardless of frame type
- Always show the button at 0.4 opacity via @media(hover:hover) override
  so users can discover it without having to hover first; EC's existing
  higher-specificity rules step it up to 0.75 on frame hover and 1.0
  on button hover

Co-Authored-By: Oz <oz-agent@warp.dev>

Author: dannyneira

src/styles/warp-components.css

@@ -209,6 +209,17 @@ pre.astro-code,
   border-color: rgba(0, 0, 0, 0.12);
 }
 
+/* Always show copy button at reduced opacity so it's discoverable without
+   hovering. EC hides it with opacity:0 in @media(hover:hover) by default;
+   override to 0.4 so the button is subtly visible at all times, progressing
+   to 0.75 on frame hover and 1.0 when hovering the button itself (both via
+   higher-specificity EC rules that win over this one). */
+@media (hover: hover) {
+  .expressive-code .copy button {
+    opacity: 0.4;
+  }
+}
+
 /* Inline code — same optical size as fenced blocks (0.9375em / 15px) so
    prose, callouts, and code blocks share one type scale.
 
@@ -247,6 +258,17 @@ pre.astro-code,
   display: none;
 }
 
+/* For untitled frames of any type, directly override the copy button's
+   inset-block-start. EC's .is-terminal frames get a large --button-spacing
+   to clear the titlebar we hide; bypassing that variable with an explicit
+   0.5rem offset places the button cleanly inside the top-right corner of
+   every untitled block. Titled frames are unaffected — their button
+   continues to sit below the visible title bar via EC's default spacing. */
+.expressive-code .frame:not(.has-title) .copy {
+  inset-block-start: 0.5rem;
+  inset-inline-end: 0.5rem;
+}
+
 /* Code blocks inside asides: keep the standalone padding rhythm so a code
    block looks identical inside or outside a callout. Pull a small block
    margin so the card sits flush within the callout's tinted area. */