chore(build): drop redundant tailwindcss direct dependency

@tailwindcss/node already depends on tailwindcss at the same exact
version (4.3.3), so a top-level entry would only risk a second copy
resolving in the build process. The one-copy pin the native-binding
rule requires is now held solely by @tailwindcss/node's exact
dependency; update the tailwind.css comment to match.

package.json

@@ -149,7 +149,6 @@
     "react-dom": "^18.3.1",
     "shiki": "^4.3.1",
     "simple-icons": "16.32.0",
-    "tailwindcss": "4.3.3",
     "tsdown": "^0.23.0",
     "typescript": "^7.0.2",
     "vitest": "^4.1.11",

pnpm-lock.yaml

@@ -141,9 +141,6 @@ importers:
       simple-icons:
         specifier: 16.32.0
         version: 16.32.0
-      tailwindcss:
-        specifier: 4.3.3
-        version: 4.3.3
       tsdown:
         specifier: ^0.23.0
         version: 0.23.0(typescript@7.0.2)

src/client/styles/tailwind.css

@@ -14,9 +14,10 @@
  * - dsh styles itself through CSS modules and `--ds-*`/`--dsw-*` tokens, so generic names like
  *   `flex`/`gap-2` cannot collide; the flat `lc-*` namespace is the plugin's own chrome.
  *
- * tailwindcss / @tailwindcss/node / @tailwindcss/oxide are pinned to one exact version (as is
- * lightningcss): the config process loads this compiler alongside lightningcss's native binding, and
- * two copies of any native set in that realm break the napi calls.
+ * @tailwindcss/node / @tailwindcss/oxide are pinned to one exact version (as is lightningcss): the
+ * config process loads this compiler alongside lightningcss's native binding, and two copies of any
+ * native set in that realm break the napi calls. `tailwindcss` itself is not a direct dependency —
+ * @tailwindcss/node pulls it at that same exact version, so the pin holds with no second entry.
  */
 @theme static {
   --spacing: 4px;