Revise terminal compatibility and update HTML content

- Updated index.html to reflect that ZDTT is now Linux-only, removing references to macOS.
- Modified descriptions and prompts in terminal.py to clarify support for only Debian-based and Arch Linux systems.
- Removed macOS-specific installation instructions and checks from the terminal code.

index.html

@@ -28,10 +28,10 @@
     </nav>
 
     <div class="hero__content">
-      <p class="eyebrow">Linux & macOS terminal</p>
+      <p class="eyebrow">Linux-first terminal</p>
       <h1>ZDTT Terminal</h1>
       <p class="lead">
-        A semi vibe-coded, distro-aware terminal experience for Debian, Arch, and macOS power users.
+        A semi vibe-coded, distro-aware terminal experience for Debian and Arch power users.
         Smart onboarding, plugin support, custom aliases, and a living status bar—no fluff.
       </p>
       <div class="hero__actions">
@@ -50,7 +50,7 @@
       </div>
       <div class="metric">
         <p class="metric__label">Supported families</p>
-        <p class="metric__value">Debian · Arch · macOS</p>
+        <p class="metric__value">Debian · Arch</p>
       </div>
       <div class="metric">
         <p class="metric__label">Extension slots</p>
@@ -64,7 +64,7 @@
       <div class="section__intro">
         <p class="eyebrow">Why ZDTT</p>
         <h2>Built for Linux hackers, tuned for comfort.</h2>
-        <p>ZDTT pairs a friendly onboarding story with serious tooling. No learning cliff, no silent failure when you hop distros or switch to macOS.</p>
+        <p>ZDTT pairs a friendly onboarding story with serious tooling. No learning cliff, no silent failure when you hop distros.</p>
       </div>
       <div class="feature-grid">
         <article class="card">
@@ -114,7 +114,7 @@
         </li>
       </ol>
       <div class="callout">
-        <p><strong>Heads up:</strong> ZDTT supports Linux (Debian/Arch) and macOS. Other systems can continue at your own risk—warnings are built in.</p>
+        <p><strong>Heads up:</strong> ZDTT is Linux-only. Non-Debian/Arch installs can continue at your own risk—warnings are built in.</p>
       </div>
     </section>
 
@@ -165,7 +165,7 @@ Traceback (most recent call last):
   </main>
 
   <footer class="footer">
-    <p>© <span id="year"></span> ZDTT • Built for Debian + Arch + macOS explorers.</p>
+    <p>© <span id="year"></span> ZDTT • Built for Debian + Arch explorers.</p>
     <a href="#top">Back to top ↑</a>
   </footer>