fix: disable highlight.js on code blocks to preserve prompt color

- Remove language-sh class so highlight.js doesn't override inline styles
- Simplify CSS without !important rules
- Prompt $ now displays correctly in orange

Author: fulsomenko

web/index.html

@@ -28,20 +28,20 @@ <h2>Getting Started</h2>
       <div class="install-methods">
         <div class="install-method">
           <h3>From Crates.io</h3>
-          <pre><code class="code-block language-sh"><span class="prompt" style="color: #c9714a;">$</span> cargo install kanban-cli</code></pre>
+          <pre><code class="code-block"><span class="prompt" style="color: #c9714a;">$</span> cargo install kanban-cli</code></pre>
         </div>
 
         <div class="install-method">
           <h3>Using Nix</h3>
-          <pre><code class="code-block language-sh"><span class="prompt" style="color: #c9714a;">$</span> nix run github:fulsomenko/kanban
+          <pre><code class="code-block"><span class="prompt" style="color: #c9714a;">$</span> nix run github:fulsomenko/kanban
 <span class="prompt" style="color: #c9714a;">$</span> # or
 <span class="prompt" style="color: #c9714a;">$</span> nix run github:nixos/nixpkgs/nixpkgs-unstable#kanban
 </code></pre>
         </div>
 
         <div class="install-method">
           <h3>From Source</h3>
-          <pre><code class="code-block language-sh"><span class="prompt" style="color: #c9714a;">$</span> git clone https://github.com/fulsomenko/kanban
+          <pre><code class="code-block"><span class="prompt" style="color: #c9714a;">$</span> git clone https://github.com/fulsomenko/kanban
 <span class="prompt" style="color: #c9714a;">$</span> cd kanban
 <span class="prompt" style="color: #c9714a;">$</span> cargo install --path crates/kanban-cli</code></pre>
         </div>

web/styles.css

@@ -319,12 +319,8 @@ a:hover {
 }
 
 .prompt {
-  color: #c9714a !important;
-  font-weight: var(--font-weight-semibold) !important;
-}
-
-.code-block .prompt {
-  color: #c9714a !important;
+  color: #c9714a;
+  font-weight: var(--font-weight-semibold);
 }
 
 pre {