feat: naomi did too much at once (#53)

- feat: add slash commands
- feat: toggle window always on top
- fix: save settings button closes settings panel
- feat: input history (both text and commands)
- feat: add keyboard shortcuts
- feat: add confirmation modal when closing connected tabs
- fix: better text colours in light mode
- fix: handle multiple tabs requesting permission

Closes #6
Closes #13
Closes #21
Closes #28

Reviewed-on: #53
Co-authored-by: Naomi Carrigan <commits@nhcarrigan.com>
Co-committed-by: Naomi Carrigan <commits@nhcarrigan.com>

src/lib/components/HelpPanel.svelte

@@ -43,14 +43,7 @@
         "🔒 Grant tool permissions as needed for security",
         "📌 Pin important conversations for quick access",
         "🎨 Customize your theme and preferences in Settings",
-      ],
-    },
-    {
-      title: "Keyboard Shortcuts",
-      items: [
-        "Ctrl/Cmd + Enter: Send message",
-        "Ctrl/Cmd + K: Clear chat (when supported)",
-        "Escape: Close modals and panels",
+        "⌨️ Check the keyboard icon for available shortcuts",
       ],
     },
   ];
@@ -72,10 +65,12 @@
     tabindex="-1"
   >
     <div class="flex items-center justify-between p-6 pb-4 border-b border-[var(--border-color)]">
-      <h2 id="help-title" class="text-xl font-semibold text-gray-100">How to Use Hikari Desktop</h2>
+      <h2 id="help-title" class="text-xl font-semibold text-[var(--text-primary)]">
+        How to Use Hikari Desktop
+      </h2>
       <button
         onclick={onClose}
-        class="p-1 text-gray-500 hover:text-gray-300 transition-colors"
+        class="p-1 text-[var(--text-secondary)] hover:text-[var(--text-primary)] transition-colors"
         aria-label="Close"
       >
         <svg class="w-5 h-5" fill="none" stroke="currentColor" viewBox="0 0 24 24">
@@ -92,8 +87,8 @@
     <div class="overflow-y-auto flex-1 p-6 space-y-6">
       {#each sections as section (section.title)}
         <div>
-          <h3 class="font-medium text-gray-200 mb-3">{section.title}</h3>
-          <ul class="space-y-2 text-sm text-gray-400">
+          <h3 class="font-medium text-[var(--text-primary)] mb-3">{section.title}</h3>
+          <ul class="space-y-2 text-sm text-[var(--text-secondary)]">
             {#each section.items as item (item)}
               <li class="flex items-start">
                 <span class="text-[var(--accent-primary)] mr-2 mt-0.5">•</span>
@@ -105,7 +100,7 @@
       {/each}
 
       <div class="pt-4 border-t border-[var(--border-color)]">
-        <p class="text-sm text-gray-500">
+        <p class="text-sm text-[var(--text-tertiary)]">
           <strong>Need more help?</strong> Join our Discord community for support and updates!
         </p>
       </div>