fix: Link2 undefined crash + goal multi-select + custom goal

ChannelView.js:
- Добавлен Link2 в import lucide-react (ReferenceError при открытии канала)
- Отображение goal учитывает множественные значения через split(',')

app/page.js:
- Аналогичный фикс отображения goal (split → map → join)

channels/new/page.js:
- Цель канала: single-select → multi-select (можно выбрать несколько)
- Кастомная цель: поле + кнопка «+», Enter, чипы с удалением
- Сохраняется как CSV строка (goal: goals.join(','))

DB:
- channels.goal varchar(50) → varchar(255) для длинных кастомных значений

app/channels/new/page.js

@@ -49,7 +49,8 @@ export default function NewChannelPage() {
   const [name, setName] = useState('');
   const [niche, setNiche] = useState('');
   const [audience, setAudience] = useState('');
-  const [goal, setGoal] = useState('educational');
+  const [goals, setGoals] = useState(['educational']); // multi-select, отправляем как CSV
+  const [customGoal, setCustomGoal] = useState('');   // поле для своей цели
   const [language, setLanguage] = useState('ru');
 
   // Шаг 2 — стиль
@@ -70,7 +71,7 @@ export default function NewChannelPage() {
     setBusy(true);
     setError('');
     const data = {
-      name, niche, audience, goal, language, region: 'ru',
+      name, niche, audience, goal: goals.join(','), language, region: 'ru',
       style: {
         tone, formality, humor,
         post_length: postLength,
@@ -150,22 +151,67 @@ export default function NewChannelPage() {
             />
           </div>
           <div>
-            <label className="label">Цель канала</label>
+            <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">
-              {GOALS.map(g => (
-                <button
-                  key={g.v}
-                  type="button"
-                  onClick={() => setGoal(g.v)}
-                  className={`p-2.5 rounded-lg border text-left transition-colors ${
-                    goal === g.v ? '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>
-              ))}
+              {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>
+            {/* Своя цель */}
+            <div className="flex gap-2 mt-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>
+            {/* Выбранные кастомные цели — чипы */}
+            {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))} className="hover:text-red-400">
+                      <X className="w-3 h-3" />
+                    </button>
+                  </span>
+                ))}
+              </div>
+            )}
           </div>
           <div>
             <label className="label">Язык постов</label>

app/page.js

@@ -68,7 +68,7 @@ export default async function HomePage() {
                     {ch.name}
                   </h3>
                   <span className="text-xs px-2 py-0.5 rounded-full bg-surface2 text-gray-400">
-                    {GOAL_LABELS[ch.goal] || ch.goal}
+                    {(ch.goal || '').split(',').map(g => GOAL_LABELS[g.trim()] || g.trim()).join(' · ')}
                   </span>
                 </div>
                 {ch.niche && (