feat: AI photo enhancement (Real-ESRGAN container) + restore original

- new photo-ai service: FastAPI + Real-ESRGAN x2plus on CPU, internal only
- async job queue in server (POST enhance-ai / GET status), 5min timeout, sequential processing
- keep original photo backup (entries.photo_original_path, uploads/.originals), restore-original endpoint
- UI: AI button and restore-original button in enhance modal
- db: photo_original_path column (init.sql, migration.sql, runtime ensure)

public/journal.html

@@ -187,6 +187,8 @@
       <div class="settings-field"><label>Резкость <span id="enhanceSharpVal">0%</span></label><input type="range" id="enhanceSharp" min="0" max="100" value="0"></div>
     </div>
     <div class="card-foot" style="justify-content:flex-end;gap:8px;margin-top:6px">
+      <button type="button" class="btn-primary ghost" id="enhanceRestoreBtn" style="display:none" title="Вернуть исходную фотографию">↩ Вернуть оригинал</button>
+      <button type="button" class="btn-primary ghost" id="enhanceAiBtn" style="display:none" title="ИИ-восстановление (Real-ESRGAN)">🤖 ИИ</button>
       <button type="button" class="btn-primary ghost" id="enhanceAutoBtn" title="Подобрать настройки автоматически">✨ Авто</button>
       <button type="button" class="btn-primary ghost" id="enhanceCancelBtn">Оставить как есть</button>
       <button type="button" class="btn-primary" id="enhanceSaveBtn">Применить</button>

public/js/journal.js

@@ -424,6 +424,8 @@ let enhanceTimer = null;
 let enhanceSaving = false;
 let enhanceEngine = 'auto';
 let enhanceEngineLoaded = false;
+let photoAiEnabled = false;
+let photoAiPollTimer = null;
 
 async function loadEnhanceEngine() {
   if (enhanceEngineLoaded) return;
@@ -432,9 +434,79 @@ async function loadEnhanceEngine() {
     const r = await fetch(`${API}/api/public-settings`);
     const f = await r.json();
     if (['auto', 'server', 'client'].includes(f.photo_enhance_engine)) enhanceEngine = f.photo_enhance_engine;
+    photoAiEnabled = f.photo_ai_enabled === 'true';
   } catch (e) {}
 }
 
+async function runPhotoAi() {
+  if (!enhanceEntryId || enhanceSaving) return;
+  const entryId = enhanceEntryId;
+  if (!confirm('ИИ-восстановление фото (Real-ESRGAN). Может занять до минуты на CPU. Продолжить?')) return;
+  enhanceSaving = true;
+  const btn = document.getElementById('enhanceAiBtn');
+  btn.disabled = true;
+  const loading = document.getElementById('enhanceLoading');
+  const canvas = document.getElementById('enhanceCanvas');
+  try {
+    const res = await fetch(`${API}/api/entries/${enhanceEntryId}/photo/enhance-ai`, { method: 'POST', headers: hdr() });
+    if (!res.ok) {
+      const err = await res.json().catch(() => ({}));
+      throw new Error(err.error || 'Ошибка запуска ИИ');
+    }
+    const { jobId } = await res.json();
+    canvas.style.display = 'none';
+    loading.style.display = '';
+    loading.textContent = 'ИИ обрабатывает фото... (может занять до минуты)';
+    btn.textContent = '⏳ ИИ...';
+    const result = await new Promise((resolve, reject) => {
+      photoAiPollTimer = setInterval(async () => {
+        try {
+          const r = await fetch(`${API}/api/entries/${enhanceEntryId}/photo/enhance-ai/${jobId}`, { headers: hdr() });
+          if (!r.ok) throw new Error('Ошибка опроса статуса');
+          const s = await r.json();
+          if (s.status === 'done') { clearInterval(photoAiPollTimer); resolve(s); }
+          else if (s.status === 'error') { clearInterval(photoAiPollTimer); reject(new Error(s.error || 'Ошибка ИИ')); }
+        } catch (e) { clearInterval(photoAiPollTimer); reject(e); }
+      }, 2000);
+    });
+    showToast('Фото восстановлено ИИ');
+    closeEnhance();
+    refreshEntryCard(entryId);
+  } catch (e) {
+    loading.style.display = 'none';
+    canvas.style.display = 'block';
+    alert(e.message);
+  } finally {
+    enhanceSaving = false;
+    btn.disabled = false;
+    btn.textContent = '🤖 ИИ';
+  }
+}
+
+async function restoreOriginal() {
+  if (!enhanceEntryId || enhanceSaving) return;
+  if (!confirm('Вернуть исходную фотографию? Текущая улучшенная версия будет удалена.')) return;
+  enhanceSaving = true;
+  const btn = document.getElementById('enhanceRestoreBtn');
+  btn.disabled = true;
+  try {
+    const res = await fetch(`${API}/api/entries/${enhanceEntryId}/photo/restore-original`, { method: 'POST', headers: hdr() });
+    if (!res.ok) {
+      const err = await res.json().catch(() => ({}));
+      throw new Error(err.error || 'Ошибка восстановления');
+    }
+    const savedId = enhanceEntryId;
+    showToast('Оригинал возвращён');
+    closeEnhance();
+    refreshEntryCard(savedId);
+  } catch (e) {
+    alert(e.message);
+  } finally {
+    enhanceSaving = false;
+    btn.disabled = false;
+  }
+}
+
 function openEnhance(id) {
   const e = currentEntries.find(x => x.id === id);
   if (!e) return;
@@ -452,6 +524,10 @@ function openEnhance(id) {
   document.getElementById('enhanceSharpVal').textContent = '0%';
   const orig = document.getElementById('enhanceOrig');
   orig.src = `${API}${mp}`;
+  document.getElementById('enhanceRestoreBtn').style.display = e.photo_original_path ? '' : 'none';
+  loadEnhanceEngine().then(() => {
+    document.getElementById('enhanceAiBtn').style.display = photoAiEnabled ? '' : 'none';
+  });
   const canvas = document.getElementById('enhanceCanvas');
   canvas.style.display = 'none';
   const loading = document.getElementById('enhanceLoading');
@@ -1052,6 +1128,8 @@ document.getElementById('editPhotoPreview').addEventListener('click', e => {
 document.getElementById('aiCorrectBtn').addEventListener('click', aiCorrect);
 document.getElementById('enhanceCancelBtn').addEventListener('click', closeEnhance);
 document.getElementById('enhanceAutoBtn').addEventListener('click', autoEnhance);
+document.getElementById('enhanceAiBtn').addEventListener('click', runPhotoAi);
+document.getElementById('enhanceRestoreBtn').addEventListener('click', restoreOriginal);
 document.getElementById('enhanceSaveBtn').addEventListener('click', saveEnhance);
 document.getElementById('enhanceModal').addEventListener('click', e => { if (e.target === e.currentTarget) closeEnhance(); });
 document.getElementById('enhanceBrightness').addEventListener('input', scheduleEnhancePreview);