feat: v0.1.1 迭代——人设外键重构、Chat UI优化、意识节点防幻觉、日志双视图

1. 人设外键重构：persona_template 成为 system_prompt 唯一权威来源，
   agent/系统节点通过 persona_id FK 引用，含数据迁移脚本
2. Chat UI：去掉底部AI提示、加号改为弹出菜单、新建对话乐观跳转
3. 意识节点：无可用worker时禁止编造agent_id，只能自行完成或拒绝
4. 日志页面：双tab布局（系统日志 + 工作流日志列表选择）
5. 其他：SSE流式聊天、对话删除/重命名、standalone模式修复

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

alembic/versions/2026_06_04_0003-0006_simplify_persona_template.py

@@ -0,0 +1,34 @@
+"""simplify persona_template to name + system_prompt
+
+Revision ID: 0006
+Revises: 0005
+Create Date: 2026-06-04
+"""
+
+from alembic import op
+import sqlalchemy as sa
+
+revision = "0006"
+down_revision = "0005"
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    op.drop_column("persona_template", "description")
+    op.drop_column("persona_template", "agent_type")
+    op.drop_column("persona_template", "provider_title")
+    op.drop_column("persona_template", "model_id")
+    op.drop_column("persona_template", "tools")
+    op.drop_column("persona_template", "tags")
+    op.drop_column("persona_template", "is_builtin")
+
+
+def downgrade() -> None:
+    op.add_column("persona_template", sa.Column("description", sa.Text(), nullable=False, server_default=""))
+    op.add_column("persona_template", sa.Column("agent_type", sa.String(32), nullable=False, server_default="ordinary"))
+    op.add_column("persona_template", sa.Column("provider_title", sa.String(50), nullable=True))
+    op.add_column("persona_template", sa.Column("model_id", sa.String(100), nullable=True))
+    op.add_column("persona_template", sa.Column("tools", sa.JSON(), server_default="[]"))
+    op.add_column("persona_template", sa.Column("tags", sa.JSON(), server_default="[]"))
+    op.add_column("persona_template", sa.Column("is_builtin", sa.Boolean(), nullable=False, server_default="false"))