Rename the claude provider to anthropic with an ant: prefix

The provider is Anthropic; Claude is its model family. Models now take
the ant: prefix (e.g. ant:claude-opus-5-5), the provider value sent to
the proxy is "anthropic", and the key lives in anthropic_api_key /
USER.apiKeyAnthropic. No fallback for the old names.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/parts/modals.html

@@ -99,13 +99,13 @@
   <div class="px-4 py-3 border-b text-sm font-semibold flex items-center justify-between"><span>Model name</span><button type="button" onclick="modelHelp.close()" class="p-1 rounded hover:bg-gray-100" aria-label="Close"><svg viewBox="0 0 24 24" class="h-5 w-5" fill="none" stroke="currentColor" stroke-width="2"><path stroke-linecap="round" stroke-linejoin="round" d="M6 18L18 6M6 6l12 12"/></svg></button></div>
   <div class="p-4 space-y-3 text-sm text-gray-700 [&_code]:text-xs [&_code]:bg-gray-100 [&_code]:rounded [&_code]:px-1 [&_code]:py-0.5 [&_a]:underline [&_a]:text-gray-900">
     <p>The <b>Provider</b> selected in <b>Account Settings → General</b> is used, unless the model name starts with one of these prefixes:</p>
-    <div class="grid grid-cols-[auto_1fr] gap-x-3 gap-y-1"><code>or:</code><span>OpenRouter</span><code>oai:</code><span>OpenAI</span><code>g:</code><span>Google</span><code>cla:</code><span>Claude</span></div>
+    <div class="grid grid-cols-[auto_1fr] gap-x-3 gap-y-1"><code>or:</code><span>OpenRouter</span><code>oai:</code><span>OpenAI</span><code>g:</code><span>Google</span><code>ant:</code><span>Anthropic</span></div>
     <p>After the prefix, write the model slug exactly the way that provider's API expects it:</p>
     <div class="space-y-2">
       <div><div class="font-medium">OpenRouter <span class="font-normal text-gray-400">· vendor/model</span></div><code>or:anthropic/claude-opus-5.5</code><div class="text-xs text-gray-500 mt-0.5">Browse slugs at <a href="https://openrouter.ai/models" target="_blank" rel="noopener">openrouter.ai/models</a></div></div>
       <div><div class="font-medium">OpenAI</div><code>oai:gpt-6-sol</code><div class="text-xs text-gray-500 mt-0.5"><a href="https://platform.openai.com/docs/models" target="_blank" rel="noopener">OpenAI models</a></div></div>
       <div><div class="font-medium">Google</div><code>g:gemini-3.8-flash</code><div class="text-xs text-gray-500 mt-0.5"><a href="https://ai.google.dev/gemini-api/docs/models" target="_blank" rel="noopener">Gemini models</a></div></div>
-      <div><div class="font-medium">Claude</div><code>cla:claude-opus-5-5</code><div class="text-xs text-gray-500 mt-0.5"><a href="https://docs.anthropic.com/en/docs/about-claude/models" target="_blank" rel="noopener">Claude models</a></div></div>
+      <div><div class="font-medium">Anthropic</div><code>ant:claude-opus-5-5</code><div class="text-xs text-gray-500 mt-0.5"><a href="https://docs.anthropic.com/en/docs/about-claude/models" target="_blank" rel="noopener">Claude models</a></div></div>
     </div>
     <p class="text-xs text-gray-500">Tip: add <code>:online</code> to the end to enable web search, e.g. <code>g:gemini-3.8-flash:online</code>.</p>
   </div>
@@ -118,11 +118,11 @@
       <form id="accountSettingsForm" class="flex flex-col min-h-0 text-sm">
         <div class="border-b flex text-xs font-medium"><button type="button" id="accountTabGeneral" class="flex-1 py-2 px-3 text-center border-b-2 border-black">General</button><button type="button" id="accountTabAPI" class="flex-1 py-2 px-3 text-center border-b-2 border-transparent hover:border-gray-300">API</button><button type="button" id="accountTabUser" class="flex-1 py-2 px-3 text-center border-b-2 border-transparent hover:border-gray-300">User</button></div>
         <div id="accountPanelGeneral" class="p-4 space-y-4 overflow-y-auto">
-          <div><label class="block text-gray-700 font-medium mb-1">Provider</label><select id="set_provider" class="w-full rounded-xl border border-gray-300 px-3 py-2"><option value="openrouter">OpenRouter</option><option value="openai">OpenAI</option><option value="google">Google</option><option value="claude">Claude</option></select><p class="mt-1 text-xs text-gray-500">Or you can prefix model names with or:, oai:, g:, or cla: to override.</p></div>
+          <div><label class="block text-gray-700 font-medium mb-1">Provider</label><select id="set_provider" class="w-full rounded-xl border border-gray-300 px-3 py-2"><option value="openrouter">OpenRouter</option><option value="openai">OpenAI</option><option value="google">Google</option><option value="anthropic">Anthropic</option></select><p class="mt-1 text-xs text-gray-500">Or you can prefix model names with or:, oai:, g:, or ant: to override.</p></div>
           <div><label class="block text-gray-700 font-medium mb-1">Master Prompt</label><textarea id="set_master_prompt" rows="6" class="w-full rounded-xl border border-gray-300 px-3 py-2" placeholder="Applies to all sunes on this device"></textarea><p class="mt-1 text-xs text-gray-500">Stored locally.</p></div>
           <div><label class="block text-gray-700 font-medium mb-1">Model preference for titles</label><input id="set_title_model" type="text" class="w-full rounded-xl border border-gray-300 px-3 py-2" placeholder="or:google/gemma-3-12b-it"/><p class="mt-1 text-xs text-gray-500">Used for auto-generating thread titles.</p></div>
         </div>
-        <div id="accountPanelAPI" class="p-4 overflow-y-auto hidden"><div class="grid grid-cols-2 gap-x-4 gap-y-4"><div><label class="block text-gray-700 font-medium mb-1">OpenRouter Key</label><div class="relative"><input id="set_api_key_or" type="password" class="w-full rounded-xl border border-gray-300 px-3 py-2 pr-10" placeholder="sk-or-..."><button type="button" data-reveal-for="set_api_key_or" class="absolute inset-y-0 right-0 px-3 flex items-center text-gray-400 hover:text-gray-600"><i data-lucide="eye" class="h-4 w-4"></i></button></div><p class="mt-1 text-xs text-gray-500">Use: <code>USER.apiKeyOpenRouter</code></p></div><div><label class="block text-gray-700 font-medium mb-1">OpenAI Key</label><div class="relative"><input id="set_api_key_oai" type="password" class="w-full rounded-xl border border-gray-300 px-3 py-2 pr-10" placeholder="sk-..."><button type="button" data-reveal-for="set_api_key_oai" class="absolute inset-y-0 right-0 px-3 flex items-center text-gray-400 hover:text-gray-600"><i data-lucide="eye" class="h-4 w-4"></i></button></div><p class="mt-1 text-xs text-gray-500">Use: <code>USER.apiKeyOpenAI</code></p></div><div><label class="block text-gray-700 font-medium mb-1">Google Key</label><div class="relative"><input id="set_api_key_g" type="password" class="w-full rounded-xl border border-gray-300 px-3 py-2 pr-10" placeholder="AIza..."><button type="button" data-reveal-for="set_api_key_g" class="absolute inset-y-0 right-0 px-3 flex items-center text-gray-400 hover:text-gray-600"><i data-lucide="eye" class="h-4 w-4"></i></button></div><p class="mt-1 text-xs text-gray-500">Gemini/Studio. Use: <code>USER.apiKeyGoogle</code></p></div><div><label class="block text-gray-700 font-medium mb-1">Claude Key</label><div class="relative"><input id="set_api_key_claude" type="password" class="w-full rounded-xl border border-gray-300 px-3 py-2 pr-10" placeholder="sk-ant-..."><button type="button" data-reveal-for="set_api_key_claude" class="absolute inset-y-0 right-0 px-3 flex items-center text-gray-400 hover:text-gray-600"><i data-lucide="eye" class="h-4 w-4"></i></button></div><p class="mt-1 text-xs text-gray-500">Use: <code>USER.apiKeyClaude</code></p></div><div><label class="block text-gray-700 font-medium mb-1">Cloudflare Token</label><div class="relative"><input id="set_api_key_cf" type="password" class="w-full rounded-xl border border-gray-300 px-3 py-2 pr-10" placeholder="..."><button type="button" data-reveal-for="set_api_key_cf" class="absolute inset-y-0 right-0 px-3 flex items-center text-gray-400 hover:text-gray-600"><i data-lucide="eye" class="h-4 w-4"></i></button></div><p class="mt-1 text-xs text-gray-500">Not used. Use: <code>USER.apiKeyCloudflare</code></p></div><div><label class="block text-gray-700 font-medium mb-1">Custom Key 1</label><div class="relative"><input id="set_api_key_custom1" type="password" class="w-full rounded-xl border border-gray-300 px-3 py-2 pr-10" placeholder="..."><button type="button" data-reveal-for="set_api_key_custom1" class="absolute inset-y-0 right-0 px-3 flex items-center text-gray-400 hover:text-gray-600"><i data-lucide="eye" class="h-4 w-4"></i></button></div><p class="mt-1 text-xs text-gray-500">Use: <code>USER.customKey1</code></p></div><div><label class="block text-gray-700 font-medium mb-1">Github Token</label><div class="relative"><input id="set_gh_token" type="password" class="w-full rounded-xl border border-gray-300 px-3 py-2 pr-10" placeholder="ghp_..."><button type="button" data-reveal-for="set_gh_token" class="absolute inset-y-0 right-0 px-3 flex items-center text-gray-400 hover:text-gray-600"><i data-lucide="eye" class="h-4 w-4"></i></button></div><p class="mt-1 text-xs text-gray-500">Use: <code>USER.githubToken</code></p></div></div></div>
+        <div id="accountPanelAPI" class="p-4 overflow-y-auto hidden"><div class="grid grid-cols-2 gap-x-4 gap-y-4"><div><label class="block text-gray-700 font-medium mb-1">OpenRouter Key</label><div class="relative"><input id="set_api_key_or" type="password" class="w-full rounded-xl border border-gray-300 px-3 py-2 pr-10" placeholder="sk-or-..."><button type="button" data-reveal-for="set_api_key_or" class="absolute inset-y-0 right-0 px-3 flex items-center text-gray-400 hover:text-gray-600"><i data-lucide="eye" class="h-4 w-4"></i></button></div><p class="mt-1 text-xs text-gray-500">Use: <code>USER.apiKeyOpenRouter</code></p></div><div><label class="block text-gray-700 font-medium mb-1">OpenAI Key</label><div class="relative"><input id="set_api_key_oai" type="password" class="w-full rounded-xl border border-gray-300 px-3 py-2 pr-10" placeholder="sk-..."><button type="button" data-reveal-for="set_api_key_oai" class="absolute inset-y-0 right-0 px-3 flex items-center text-gray-400 hover:text-gray-600"><i data-lucide="eye" class="h-4 w-4"></i></button></div><p class="mt-1 text-xs text-gray-500">Use: <code>USER.apiKeyOpenAI</code></p></div><div><label class="block text-gray-700 font-medium mb-1">Google Key</label><div class="relative"><input id="set_api_key_g" type="password" class="w-full rounded-xl border border-gray-300 px-3 py-2 pr-10" placeholder="AIza..."><button type="button" data-reveal-for="set_api_key_g" class="absolute inset-y-0 right-0 px-3 flex items-center text-gray-400 hover:text-gray-600"><i data-lucide="eye" class="h-4 w-4"></i></button></div><p class="mt-1 text-xs text-gray-500">Gemini/Studio. Use: <code>USER.apiKeyGoogle</code></p></div><div><label class="block text-gray-700 font-medium mb-1">Anthropic Key</label><div class="relative"><input id="set_api_key_ant" type="password" class="w-full rounded-xl border border-gray-300 px-3 py-2 pr-10" placeholder="sk-ant-..."><button type="button" data-reveal-for="set_api_key_ant" class="absolute inset-y-0 right-0 px-3 flex items-center text-gray-400 hover:text-gray-600"><i data-lucide="eye" class="h-4 w-4"></i></button></div><p class="mt-1 text-xs text-gray-500">Use: <code>USER.apiKeyAnthropic</code></p></div><div><label class="block text-gray-700 font-medium mb-1">Cloudflare Token</label><div class="relative"><input id="set_api_key_cf" type="password" class="w-full rounded-xl border border-gray-300 px-3 py-2 pr-10" placeholder="..."><button type="button" data-reveal-for="set_api_key_cf" class="absolute inset-y-0 right-0 px-3 flex items-center text-gray-400 hover:text-gray-600"><i data-lucide="eye" class="h-4 w-4"></i></button></div><p class="mt-1 text-xs text-gray-500">Not used. Use: <code>USER.apiKeyCloudflare</code></p></div><div><label class="block text-gray-700 font-medium mb-1">Custom Key 1</label><div class="relative"><input id="set_api_key_custom1" type="password" class="w-full rounded-xl border border-gray-300 px-3 py-2 pr-10" placeholder="..."><button type="button" data-reveal-for="set_api_key_custom1" class="absolute inset-y-0 right-0 px-3 flex items-center text-gray-400 hover:text-gray-600"><i data-lucide="eye" class="h-4 w-4"></i></button></div><p class="mt-1 text-xs text-gray-500">Use: <code>USER.customKey1</code></p></div><div><label class="block text-gray-700 font-medium mb-1">Github Token</label><div class="relative"><input id="set_gh_token" type="password" class="w-full rounded-xl border border-gray-300 px-3 py-2 pr-10" placeholder="ghp_..."><button type="button" data-reveal-for="set_gh_token" class="absolute inset-y-0 right-0 px-3 flex items-center text-gray-400 hover:text-gray-600"><i data-lucide="eye" class="h-4 w-4"></i></button></div><p class="mt-1 text-xs text-gray-500">Use: <code>USER.githubToken</code></p></div></div></div>
         <div id="accountPanelUser" class="p-4 space-y-4 overflow-y-auto hidden">
           <div class="flex items-center gap-4">
             <div class="relative"><img id="userAvatarPreview" class="h-16 w-16 rounded-full object-cover bg-gray-200"><button type="button" id="setUserAvatarBtn" class="absolute bottom-0 right-0 h-6 w-6 rounded-full bg-white border border-gray-300 flex items-center justify-center hover:bg-gray-100" aria-label="Edit photo"><i data-lucide="edit-3" class="h-3 w-3"></i></button></div>