feat(settings): AI model profiles management — native llama.cpp + custom OpenAI-compatible providers, default model selection, connection test

worker.js

@@ -70,16 +70,51 @@ function createEntryAutoChecker({ pool, getSetting, logAudit, aiUrl, defaultProm
     }
   }
 
+  async function resolveActiveProfile() {
+    try {
+      const active = await getSetting('ai_active_profile', 'native');
+      if (active && active !== 'native') {
+        const raw = await getSetting('ai_profiles', '[]');
+        const list = JSON.parse(raw || '[]');
+        if (Array.isArray(list)) {
+          return list.find(p => p && p.id === active && p.base_url && p.model) || null;
+        }
+      }
+    } catch (e) {}
+    return null;
+  }
+
+  function normalizeOpenAiBase(base) {
+    let b = String(base || '').trim().replace(/\/+$/, '');
+    if (!/^https?:\/\//i.test(b)) return null;
+    if (!/\/v1$/i.test(b)) b += '/v1';
+    return b;
+  }
+
   async function callModel(text, systemPrompt) {
+    const profile = await resolveActiveProfile();
+    const headers = { 'Content-Type': 'application/json' };
+    let url;
+    let model;
+    if (profile) {
+      const base = normalizeOpenAiBase(profile.base_url);
+      if (!base) throw new Error('Некорректный base_url профиля ИИ');
+      url = `${base}/chat/completions`;
+      model = profile.model;
+      if (profile.api_key) headers.Authorization = `Bearer ${profile.api_key}`;
+    } else {
+      url = `${AI_URL.replace(/\/+$/, '')}/v1/chat/completions`;
+      model = MODEL;
+    }
     const controller = new AbortController();
     const timer = setTimeout(() => controller.abort(), REQUEST_TIMEOUT_MS);
     try {
-      const res = await fetch(`${AI_URL}/v1/chat/completions`, {
+      const res = await fetch(url, {
         method: 'POST',
-        headers: { 'Content-Type': 'application/json' },
+        headers,
         signal: controller.signal,
         body: JSON.stringify({
-          model: MODEL,
+          model,
           messages: [
             { role: 'system', content: systemPrompt },
             { role: 'user', content: text },