Remove Antigravity slash command limitation note

Slash commands do work in Antigravity, so the asterisk and tooltip
warning on the Antigravity badge were incorrect. Removes both.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

public/css/main.css

@@ -2319,13 +2319,6 @@ code {
   opacity: 1;
 }
 
-/* Allow wider tooltips to wrap */
-.install-provider-badge.has-tooltip::after {
-  white-space: normal;
-  width: 220px;
-  text-align: center;
-}
-
 /* Hero logo icon wrapper */
 .hero-logo-icon {
   display: inline-flex;

public/index.html

@@ -280,9 +280,9 @@
             <img src="assets/github-logo.png" alt="VS Code Copilot" width="20" height="20" loading="lazy">
             <span>Copilot</span>
           </div>
-          <div class="install-provider-badge has-tooltip" data-tooltip="Antigravity doesn't support slash commands. Skills are auto-activated based on context, or you can ask the agent to use a skill by name.">
+          <div class="install-provider-badge">
             <img src="assets/antigravity-logo.png" alt="Antigravity" width="20" height="20" loading="lazy">
-            <span>Antigravity*</span>
+            <span>Antigravity</span>
           </div>
           <div class="install-provider-badge">
             <img src="assets/kiro-logo.png" alt="Kiro" width="20" height="20" loading="lazy">