feat(aia): Implement Protocol Agent MVP with reusable Agent framework

Sprint 1-3 Completed (Backend + Frontend):

Backend (Sprint 1-2):
- Implement 5-layer Agent framework (Query->Planner->Executor->Tools->Reflection)
- Create agent_schema with 6 tables (agent_definitions, stages, prompts, sessions, traces, reflexion_rules)
- Create protocol_schema with 2 tables (protocol_contexts, protocol_generations)
- Implement Protocol Agent core services (Orchestrator, ContextService, PromptBuilder)
- Integrate LLM service adapter (DeepSeek/Qwen/GPT-5/Claude)
- 6 API endpoints with full authentication
- 10/10 API tests passed

Frontend (Sprint 3):
- Add Protocol Agent entry in AgentHub (indigo theme card)
- Implement ProtocolAgentPage with 3-column layout
- Collapsible sidebar (Gemini style, 48px <-> 280px)
- StatePanel with 5 stage cards (scientific_question, pico, study_design, sample_size, endpoints)
- ChatArea with sync button and action cards integration
- 100% prototype design restoration (608 lines CSS)
- Detailed endpoints structure: baseline, exposure, outcomes, confounders

Features:
- 5-stage dialogue flow for research protocol design
- Conversation-driven interaction with sync-to-protocol button
- Real-time context state management
- One-click protocol generation button (UI ready, backend pending)

Database:
- agent_schema: 6 tables for reusable Agent framework
- protocol_schema: 2 tables for Protocol Agent
- Seed data: 1 agent + 5 stages + 9 prompts + 4 reflexion rules

Code Stats:
- Backend: 13 files, 4338 lines
- Frontend: 14 files, 2071 lines
- Total: 27 files, 6409 lines

Status: MVP core functionality completed, pending frontend-backend integration testing

Next: Sprint 4 - One-click protocol generation + Word export

frontend-v2/src/modules/aia/styles/agent-card.css

@@ -208,6 +208,62 @@
   transform: translate(2px, -2px);
 }
 
+/* === Indigo主题（Protocol Agent 全流程） === */
+.agent-card.theme-indigo {
+  background: linear-gradient(135deg, #EEF2FF 0%, #E0E7FF 100%);
+  border-color: #C7D2FE;
+  border-width: 2px;
+}
+
+.agent-card.theme-indigo:hover {
+  border-color: #6366F1;
+  background: linear-gradient(135deg, #E0E7FF 0%, #C7D2FE 100%);
+  box-shadow: 0 8px 20px rgba(99, 102, 241, 0.2);
+}
+
+.agent-card.theme-indigo .icon-box {
+  background-color: #6366F1;
+  border-color: #4F46E5;
+}
+
+.agent-card.theme-indigo .agent-icon {
+  color: #FFFFFF;
+}
+
+.agent-card.theme-indigo:hover .icon-box {
+  background-color: #4F46E5;
+  border-color: #4338CA;
+  transform: scale(1.08);
+}
+
+.agent-card.theme-indigo .num-watermark {
+  color: #C7D2FE;
+}
+
+.agent-card.theme-indigo:hover .num-watermark {
+  color: #A5B4FC;
+}
+
+/* Protocol Agent 特殊标记 */
+.agent-card.protocol-agent-card {
+  position: relative;
+}
+
+.agent-card.protocol-agent-card::before {
+  content: '测试';
+  position: absolute;
+  top: 8px;
+  right: 8px;
+  font-size: 10px;
+  font-weight: 600;
+  color: #6366F1;
+  background: #E0E7FF;
+  padding: 2px 6px;
+  border-radius: 4px;
+  border: 1px solid #C7D2FE;
+}
+
+
 
 
 

frontend-v2/src/modules/aia/styles/agent-hub.css

@@ -11,6 +11,7 @@
   --brand-teal: #0D9488;
   --brand-purple: #9333EA;
   --brand-yellow: #CA8A04;
+  --brand-indigo: #6366F1;
 }
 
 /* === 整体布局 === */
@@ -182,6 +183,19 @@
   background-color: var(--brand-purple);
 }
 
+.timeline-dot.theme-indigo {
+  background-color: var(--brand-indigo);
+}
+
+/* Protocol Agent 特殊样式 */
+.timeline-dot.protocol-dot {
+  width: 28px;
+  height: 28px;
+  font-size: 14px;
+  background: linear-gradient(135deg, #6366F1 0%, #4F46E5 100%);
+  box-shadow: 0 2px 8px rgba(99, 102, 241, 0.3);
+}
+
 .timeline-line {
   position: absolute;
   top: 28px;
@@ -220,6 +234,31 @@
   border-radius: 4px;
 }
 
+/* Beta徽章（Protocol Agent） */
+.beta-badge {
+  font-size: 10px;
+  font-weight: 500;
+  color: var(--brand-indigo);
+  background-color: #EEF2FF;
+  border: 1px solid #C7D2FE;
+  padding: 2px 8px;
+  border-radius: 4px;
+}
+
+/* Protocol Agent 阶段标题 */
+.protocol-title {
+  color: var(--brand-indigo);
+}
+
+/* Protocol Agent 网格（单列，宽度限制） */
+.protocol-grid {
+  max-width: 340px;
+}
+
+.agents-grid.grid-cols-1 {
+  grid-template-columns: 1fr;
+}
+
 /* === 卡片网格 === */
 .agents-grid {
   display: grid;