fix: goal+language in ChannelEdit, metrics 500 (await params)

ChannelEdit.js:
- Добавлены goal (multi-select + кастомные, как в форме создания)
- Добавлен language (select: ru/en/uk/kk)
- Импортированы Plus, X иконки и GOALS константа

app/api/metrics/channel/[channelId]/route.js:
app/api/metrics/best-time/[channelId]/route.js:
- await params (Next.js 16 требует), иначе 500

components/ChannelEdit.js

@@ -2,7 +2,15 @@
 import { useState } from 'react';
 import { useRouter } from 'next/navigation';
 import Link from 'next/link';
-import { ArrowLeft, Save, Trash2, Loader2, Image as ImageIcon, Type, Palette } from 'lucide-react';
+import { ArrowLeft, Save, Trash2, Loader2, Image as ImageIcon, Type, Palette, Plus, X } from 'lucide-react';
+
+const GOALS = [
+  { v: 'educational',   label: 'Обучение',      desc: 'Объясняем, разбираем' },
+  { v: 'news',          label: 'Новости',        desc: 'Что произошло' },
+  { v: 'entertainment', label: 'Развлечение',    desc: 'Лёгкий контент, мемы' },
+  { v: 'expert',        label: 'Экспертный',     desc: 'Глубокий анализ, инсайты' },
+  { v: 'sales',         label: 'Продажи',        desc: 'Подвести к покупке' },
+];
 
 const TONES = [
   { v: 'friendly', label: 'Дружелюбный' },
@@ -66,6 +74,11 @@ export default function ChannelEdit({ channel }) {
   const [name, setName] = useState(channel.name || '');
   const [niche, setNiche] = useState(channel.niche || '');
   const [audience, setAudience] = useState(channel.audience || '');
+  const [goals, setGoals] = useState(
+    channel.goal ? channel.goal.split(',').map(g => g.trim()).filter(Boolean) : ['educational']
+  );
+  const [customGoal, setCustomGoal] = useState('');
+  const [language, setLanguage] = useState(channel.language || 'ru');
   const [tone, setTone] = useState(style.tone || 'friendly');
   const [formality, setFormality] = useState(style.formality || 'informal');
   const [humor, setHumor] = useState(style.humor || 'moderate');
@@ -92,7 +105,7 @@ export default function ChannelEdit({ channel }) {
     setError('');
     try {
       const data = {
-        name, niche, audience,
+        name, niche, audience, goal: goals.join(','), language,
         style: {
           tone, formality, humor,
           post_length: postLength,
@@ -185,6 +198,47 @@ export default function ChannelEdit({ channel }) {
               <label className="label">Аудитория</label>
               <textarea className="input min-h-[70px]" value={audience} onChange={e => setAudience(e.target.value)} />
             </div>
+            <div>
+              <label className="label">Цель канала <span className="text-gray-500 font-normal">(можно несколько)</span></label>
+              <div className="grid grid-cols-2 sm:grid-cols-5 gap-2 mb-2">
+                {GOALS.map(g => {
+                  const on = goals.includes(g.v);
+                  return (
+                    <button key={g.v} type="button"
+                      onClick={() => setGoals(on ? goals.filter(x => x !== g.v) : [...goals, g.v])}
+                      className={`p-2.5 rounded-lg border text-left transition-colors ${on ? 'border-accent bg-accent/10' : 'border-border bg-surface2 hover:border-gray-600'}`}>
+                      <div className="text-sm font-medium">{g.label}</div>
+                      <div className="text-xs text-gray-500 mt-0.5">{g.desc}</div>
+                    </button>
+                  );
+                })}
+              </div>
+              <div className="flex gap-2">
+                <input className="input text-sm flex-1" placeholder="Своя цель — введи и нажми +"
+                  value={customGoal} onChange={e => setCustomGoal(e.target.value)}
+                  onKeyDown={e => { if (e.key === 'Enter') { e.preventDefault(); const v = customGoal.trim(); if (v && !goals.includes(v)) setGoals([...goals, v]); setCustomGoal(''); }}} />
+                <button type="button" onClick={() => { const v = customGoal.trim(); if (v && !goals.includes(v)) setGoals([...goals, v]); setCustomGoal(''); }}
+                  disabled={!customGoal.trim()} className="btn-primary px-3 disabled:opacity-40"><Plus className="w-4 h-4" /></button>
+              </div>
+              {goals.filter(g => !GOALS.find(x => x.v === g)).length > 0 && (
+                <div className="flex flex-wrap gap-1.5 mt-2">
+                  {goals.filter(g => !GOALS.find(x => x.v === g)).map(g => (
+                    <span key={g} className="inline-flex items-center gap-1 px-2 py-0.5 rounded-full bg-accent/15 border border-accent/40 text-xs">
+                      {g}<button type="button" onClick={() => setGoals(goals.filter(x => x !== g))}><X className="w-3 h-3" /></button>
+                    </span>
+                  ))}
+                </div>
+              )}
+            </div>
+            <div>
+              <label className="label">Язык постов</label>
+              <select className="input" value={language} onChange={e => setLanguage(e.target.value)}>
+                <option value="ru">Русский</option>
+                <option value="en">English</option>
+                <option value="uk">Українська</option>
+                <option value="kk">Қазақша</option>
+              </select>
+            </div>
           </div>
 
           <div className="card p-5 space-y-4">