fix(api): 修復 10 個 Lint 錯誤 (imports 排序 + unused imports + set comprehension)

- F401: 移除未使用的 imports (TerminalSessionStatus, AutoApproveDecision, TerminalSession)
- I001: 修正 import blocks 排序
- C401: set(generator) → {set comprehension}

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

apps/api/src/api/v1/terminal.py

@@ -32,7 +32,6 @@ from src.models.terminal import (
     TerminalAbortResponse,
     TerminalIntentRequest,
     TerminalIntentResponse,
-    TerminalSessionStatus,
     TerminalStatusResponse,
 )
 from src.services.terminal_service import TerminalService, get_terminal_service

apps/api/src/main.py

@@ -33,9 +33,9 @@ from sentry_sdk.integrations.starlette import StarletteIntegration
 from src.api.v1 import agents as agents_v1  # Phase 9.5: Agent Teams API
 from src.api.v1 import ai as ai_v1
 from src.api.v1 import approvals as approvals_v1
-from src.api.v1 import csrf as csrf_v1  # Phase 20: CSRF Protection
 from src.api.v1 import audit_logs as audit_logs_v1
 from src.api.v1 import auto_repair as auto_repair_v1  # #8: 自動升級決策
+from src.api.v1 import csrf as csrf_v1  # Phase 20: CSRF Protection
 from src.api.v1 import dashboard as dashboard_v1
 from src.api.v1 import errors as errors_v1  # #40: Sentry 錯誤 BFF API
 from src.api.v1 import (
@@ -52,8 +52,8 @@ from src.api.v1 import (
     sentry_webhook as sentry_webhook_v1,  # Phase 10.2.1: Sentry → Telegram
 )
 from src.api.v1 import stats as stats_v1  # Phase 6.5: Statistics Analytics
-from src.api.v1 import terminal as terminal_v1  # Phase 19.1: Omni-Terminal SSE
 from src.api.v1 import telegram as telegram_v1  # Phase 5.4: Telegram Gateway
+from src.api.v1 import terminal as terminal_v1  # Phase 19.1: Omni-Terminal SSE
 from src.api.v1 import timeline as timeline_v1
 from src.api.v1 import webhooks as webhooks_v1
 from src.core.config import settings

apps/api/src/models/terminal.py

@@ -17,7 +17,6 @@ from typing import Any
 
 from pydantic import BaseModel, Field
 
-
 # =============================================================================
 # Enums
 # =============================================================================

apps/api/src/services/__init__.py

@@ -44,6 +44,7 @@ from .graph_rag import (
     create_mock_topology,
     topology_graph,
 )
+
 # ADR-027: Incident-Approval 同步架構 (2026-03-26)
 from .incident_approval_service import (
     IncidentApprovalService,