docs(uiux): UIUX 设计方案大改 + 5 份作业指导书对齐 + 开发任务文档

- UIUX 文档：填充 19 个缺口（多主体画像/健康度/AI+看板/增长域/洞察域/创始人端/OODA/助推/商密）
- UIUX 文档：插入 6 个新章节（十四~十九），旧章节重编号为二十~三十一，更新目录和交叉引用
- 作业指导书 x5：导航改为 6 域分组，新增 Context Bar/工作模式/Insight Rail/决策线程/多工作区等 UI 概念
- 新建 docs/2-task-uiux.md：50 个代码落地开发任务，按 P0-P6 分优先级 + 8 Sprint 规划
- 后端/前端：大量新增模型、路由、组件（来自之前 Phase 开发）

backend/app/models/__init__.py

@@ -3,20 +3,83 @@
 导入所有模型以便 Alembic 自动发现。
 """
 
+from app.models.aar import AARRecord
+from app.models.agent_execution import AgentExecution
+from app.models.agreement import InvestmentAgreement
 from app.models.audit import AuditLog
+from app.models.board import BoardMeeting
 from app.models.company import Company
+from app.models.customer_plan import CustomerAcquisitionPlan
+from app.models.data_source import DataSource
+from app.models.decision_sentinel import DecisionSentinel
+from app.models.digital_twin import DigitalTwinModel
+from app.models.exit_prediction import ExitPrediction
+from app.models.financial_data import FinancialData
 from app.models.health_score import HealthScore
+from app.models.hypothesis import Hypothesis
+from app.models.inquiry import InquiryList
+from app.models.intervention import InterventionEvent, InterventionResult
+from app.models.knowledge import KnowledgeChunk
+from app.models.knowledge_graph import KnowledgeNode
+from app.models.major_event import MajorEvent
+from app.models.milestone import MilestoneTree
+from app.models.nudge import NudgeRecord
+from app.models.okr import OKR
+from app.models.peer_circle import PeerLearningCircle
+from app.models.portfolio_simulation import MonteCarloSimulation, PortfolioRebalancing
+from app.models.pre_mortem import PreMortemRecord, RedTeamRecord
+from app.models.product_diagnostic import ProductDiagnostic
+from app.models.profile import FirmProfile, FundProfile, ManagerProfile
 from app.models.report import MonthlyReport
 from app.models.risk import RiskEvent
+from app.models.synergy import SynergyOpportunity
+from app.models.talent import TalentProfile, TeamMember
+from app.models.task import Comment, Task
 from app.models.tenant import Tenant
 from app.models.user import User
+from app.models.weak_signal import WeakSignal
 
 __all__ = [
+    "AARRecord",
+    "AgentExecution",
     "AuditLog",
+    "BoardMeeting",
+    "Comment",
     "Company",
+    "CustomerAcquisitionPlan",
+    "DataSource",
+    "DecisionSentinel",
+    "DigitalTwinModel",
+    "ExitPrediction",
+    "FinancialData",
+    "FirmProfile",
+    "FundProfile",
     "HealthScore",
+    "Hypothesis",
+    "InquiryList",
+    "InterventionEvent",
+    "InterventionResult",
+    "InvestmentAgreement",
+    "KnowledgeChunk",
+    "KnowledgeNode",
+    "MajorEvent",
+    "ManagerProfile",
+    "MilestoneTree",
+    "MonteCarloSimulation",
     "MonthlyReport",
+    "NudgeRecord",
+    "OKR",
+    "PeerLearningCircle",
+    "PortfolioRebalancing",
+    "PreMortemRecord",
+    "ProductDiagnostic",
+    "RedTeamRecord",
     "RiskEvent",
+    "SynergyOpportunity",
+    "TalentProfile",
+    "Task",
+    "TeamMember",
     "Tenant",
     "User",
+    "WeakSignal",
 ]