feat: add mobile search button and allow Tailscale hosts

- Replace `MobileFAB` with `SearchTrigger` in floating controls
- Show search button on touch devices (opens omnibar)
- Allow `.ts.net` hosts via `VITE_ALLOWED_HOSTS` env var

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: ryan-williams

www/src/components/ThemeToggle.tsx

@@ -1,6 +1,7 @@
 import { useState, useEffect, useRef } from 'react'
-import { FaGithub, FaKeyboard } from 'react-icons/fa'
+import { FaGithub, FaKeyboard, FaSearch } from 'react-icons/fa'
 import { MdBrightnessAuto, MdLightMode, MdDarkMode } from 'react-icons/md'
+import { SearchTrigger } from 'use-kbd'
 import { useTheme } from '../contexts/ThemeContext'
 
 interface ThemeToggleProps {
@@ -90,15 +91,21 @@ export function ThemeToggle({ onOpenShortcuts }: ThemeToggleProps) {
         >
           <FaGithub />
         </a>
-        {canHover && onOpenShortcuts && (
-          <button
-            className="shortcuts-button"
-            onClick={onOpenShortcuts}
-            title="Keyboard shortcuts (?)"
-            aria-label="Show keyboard shortcuts"
-          >
-            <FaKeyboard />
-          </button>
+        {canHover ? (
+          onOpenShortcuts && (
+            <button
+              className="shortcuts-button"
+              onClick={onOpenShortcuts}
+              title="Keyboard shortcuts (?)"
+              aria-label="Show keyboard shortcuts"
+            >
+              <FaKeyboard />
+            </button>
+          )
+        ) : (
+          <SearchTrigger className="search-button" ariaLabel="Search actions">
+            <FaSearch />
+          </SearchTrigger>
         )}
         <button
           className="theme-toggle"

www/src/styles/_theme-toggle.scss

@@ -28,6 +28,7 @@
 
   .github-link,
   .shortcuts-button,
+  .search-button,
   .theme-toggle {
     width: 3rem;
     height: 3rem;
@@ -49,7 +50,8 @@
   }
 
   .github-link,
-  .shortcuts-button {
+  .shortcuts-button,
+  .search-button {
     color: var(--text-primary);
     text-decoration: none;
 
@@ -80,6 +82,7 @@
 
     .github-link,
     .shortcuts-button,
+    .search-button,
     .theme-toggle {
       width: 2.5rem;
       height: 2.5rem;

www/vite.config.ts

@@ -1,13 +1,14 @@
 import react from '@vitejs/plugin-react'
 import { defineConfig } from 'vite'
 
+const allowedHosts = process.env.VITE_ALLOWED_HOSTS?.split(',') ?? []
+
 // https://vite.dev/config/
 export default defineConfig({
   plugins: [react()],
   server: {
     port: 5150,
-    // Allow Docker container to access dev server
-    allowedHosts: ['host.docker.internal'],
+    allowedHosts: ['host.docker.internal', ...allowedHosts],
   },
   resolve: {
     alias: {