feat(hub): add AI coach page with daily summary and chat

Aggregate four-account trades via hub_ai module and /api/hub/trades/today; store sessions in JSON; default OpenAI config matches instances.

Co-authored-by: Cursor <cursoragent@cursor.com>

manual_trading_hub/static/app.css

@@ -3342,3 +3342,132 @@ html[data-theme="light"] button.danger {
   background: rgba(201, 53, 82, 0.1);
   border-color: rgba(201, 53, 82, 0.45);
 }
+
+/* --- Hub AI 教练 --- */
+.ai-layout {
+  display: grid;
+  grid-template-columns: 1fr 1fr;
+  gap: 16px;
+  align-items: start;
+}
+@media (max-width: 960px) {
+  .ai-layout {
+    grid-template-columns: 1fr;
+  }
+}
+.ai-panel {
+  background: var(--panel);
+  border: 1px solid var(--border-soft);
+  border-radius: var(--radius);
+  padding: 14px 16px;
+  min-height: 420px;
+  display: flex;
+  flex-direction: column;
+  gap: 12px;
+}
+.ai-panel-head {
+  display: flex;
+  flex-wrap: wrap;
+  align-items: center;
+  justify-content: space-between;
+  gap: 8px;
+}
+.ai-panel-head h2 {
+  margin: 0;
+  font-size: 1rem;
+  font-family: var(--display);
+  letter-spacing: 0.04em;
+}
+.ai-panel-actions {
+  display: flex;
+  flex-wrap: wrap;
+  align-items: center;
+  gap: 8px;
+}
+.ai-stats-row {
+  display: flex;
+  flex-wrap: wrap;
+  gap: 8px 14px;
+  font-size: 0.82rem;
+  color: var(--muted);
+}
+.ai-stat-chip {
+  padding: 4px 8px;
+  border-radius: 6px;
+  background: var(--inset-surface);
+  border: 1px solid var(--border-soft);
+}
+.ai-stat-chip strong {
+  color: var(--text);
+  margin-right: 4px;
+}
+.ai-md-body {
+  flex: 1;
+  overflow: auto;
+  max-height: min(62vh, 640px);
+  padding: 12px;
+  border-radius: 8px;
+  background: var(--inset-surface);
+  border: 1px solid var(--border-soft);
+  font-size: 0.86rem;
+  line-height: 1.55;
+  color: var(--text);
+}
+.ai-placeholder {
+  color: var(--muted);
+  margin: 0;
+}
+.ai-chat-panel {
+  min-height: 520px;
+}
+.ai-chat-messages {
+  flex: 1;
+  overflow: auto;
+  max-height: min(52vh, 520px);
+  display: flex;
+  flex-direction: column;
+  gap: 10px;
+  padding: 8px 4px;
+}
+.ai-bubble {
+  max-width: 92%;
+  padding: 10px 12px;
+  border-radius: 10px;
+  font-size: 0.88rem;
+  line-height: 1.5;
+  white-space: pre-wrap;
+  word-break: break-word;
+}
+.ai-bubble-user {
+  align-self: flex-end;
+  background: var(--accent-dim);
+  border: 1px solid var(--border);
+}
+.ai-bubble-assistant {
+  align-self: flex-start;
+  background: var(--inset-surface);
+  border: 1px solid var(--border-soft);
+}
+.ai-chat-form {
+  display: grid;
+  grid-template-columns: 1fr auto;
+  gap: 8px;
+  align-items: end;
+}
+.ai-chat-form textarea {
+  width: 100%;
+  resize: vertical;
+  min-height: 72px;
+  padding: 10px 12px;
+  border-radius: 8px;
+  border: 1px solid var(--border-soft);
+  background: var(--inset-surface);
+  color: var(--text);
+  font-family: var(--font);
+  font-size: 0.88rem;
+}
+.ai-chat-form textarea:focus {
+  outline: none;
+  border-color: var(--accent);
+}
+