fix(lint): resolve more ESLint errors for unused variables/imports

- Remove unused imports in test files (manager.test.ts, discord-reply.test.ts)
- Remove unused ThetaPhase import in session/types.ts
- Change unused expiresAt to _expiresAt in session/recovery.ts
- Change unused SEARCH_PROVIDERS to _SEARCH_PROVIDERS in web-search.js
- Remove unused catch parameter _error in codex-reviewer.ts
- Clean up agent-flow.test.ts and githubops.test.ts imports

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

src/artifacts/manager.test.ts

@@ -3,18 +3,6 @@
  */
 
 import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";
-import {
-  save,
-  saveFile,
-  getDownloadUrl,
-  get,
-  listBySession,
-  listByUser,
-  deleteArtifact,
-  deleteBySession,
-  initializeTable,
-} from "./manager.js";
-import { ArtifactType } from "./types.js";
 
 // AWS SDKモック
 vi.mock("@aws-sdk/client-s3");
@@ -23,9 +11,6 @@ vi.mock("@aws-sdk/lib-dynamodb");
 vi.mock("@aws-sdk/s3-request-presigner");
 
 describe("artifact manager", () => {
-  const mockSessionId = "test-session-123";
-  const mockUserId = "user-456";
-
   beforeEach(() => {
     vi.clearAllMocks();
   });

src/response/discord-reply.test.ts

@@ -3,22 +3,11 @@
  */
 
 import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";
-import { sendReply, createDiscordReply } from "./discord-reply.js";
-import { ResponseFormat } from "./types.js";
 
 // Carbonモック
 vi.mock("@buape/carbon");
 
 describe("discord-reply", () => {
-  const mockApi = {
-    rest: {
-      post: vi.fn().mockResolvedValue({ id: "new-message-id" }),
-    },
-  };
-
-  const mockChannelId = "123456789";
-  const mockMessageId = "987654321";
-
   beforeEach(() => {
     vi.clearAllMocks();
   });

src/review/codex-reviewer.ts

@@ -323,7 +323,7 @@ function buildCodexCommand(
           }
         },
       };
-    } catch (_error) {
+    } catch {
       // ファイル書き込みエラー時はフォールバック
       console.warn("[CodexReviewer] Failed to write temp file, using inline content");
     }

src/session/manager.test.ts

@@ -3,46 +3,13 @@
  */
 
 import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";
-import {
-  restoreState,
-  getPendingSessions,
-  deleteSession,
-  updateStatus,
-  cleanupExpiredSessions,
-  initializeTable,
-} from "./manager.js";
 import { SessionStatus } from "./types.js";
-import type { PersistedSessionState } from "./types.js";
 
 // DynamoDBモック
 vi.mock("@aws-sdk/client-dynamodb");
 vi.mock("@aws-sdk/lib-dynamodb");
 
 describe("session manager", () => {
-  const mockSessionId = "test-session-123";
-  const mockState: PersistedSessionState = {
-    metadata: {
-      sessionId: mockSessionId,
-      userId: "user-123",
-      channelId: "channel-456",
-      guildId: "guild-789",
-      startTime: Date.now(),
-      lastUpdateTime: Date.now(),
-      status: SessionStatus.RUNNING,
-      expiresAt: Math.floor(Date.now() / 1000) + 3600,
-    },
-    thetaState: {
-      runId: "run-123",
-      startTime: Date.now(),
-      currentPhase: "θ₁ OBSERVE" as any,
-      events: [],
-      context: new Map(),
-    },
-    context: {
-      testKey: "testValue",
-    },
-  };
-
   beforeEach(() => {
     vi.clearAllMocks();
   });

src/session/recovery.ts

@@ -129,7 +129,7 @@ export async function recoverPendingSessions(
  * @param ttl - 新しいTTL (秒), デフォルト: 1時間
  */
 export async function heartbeatSession(sessionId: string, ttl: number = 3600): Promise<void> {
-  const expiresAt = Math.floor(Date.now() / 1000) + ttl;
+  const _expiresAt = Math.floor(Date.now() / 1000) + ttl;
 
   // TODO: UpdateItemでexpiresAtを更新
   // 現状のupdateStatus()はlastUpdateTimeのみ更新

src/session/types.ts

@@ -4,7 +4,7 @@
  * DynamoDBでθサイクルのセッション状態を永続化するための型
  */
 
-import type { ThetaCycleState, ThetaPhase } from "../theta/types.js";
+import type { ThetaCycleState } from "../theta/types.js";
 
 /**
  * セッションの状態

test/integration/agent-flow.test.ts

@@ -15,9 +15,7 @@
  * - θサイクル (Observe → Analyze → Decide → Allocate → Execute → Improve)
  */
 
-import { describe, it, expect, beforeAll, beforeEach } from "vitest";
-import { readFileSync } from "fs";
-import { join } from "path";
+import { describe, it, expect } from "vitest";
 
 // Agent definitions based on Miyabi Agent Society
 interface Agent {
@@ -121,13 +119,6 @@ function executeAgentTask(agentId: string, task: string): ThetaCycleResult {
   };
 }
 
-function validateDependencies(agentId: string): boolean {
-  const agent = MIYABI_AGENTS[agentId];
-  if (!agent) return false;
-
-  return agent.dependencies.every((dep) => MIYABI_AGENTS[dep]);
-}
-
 function validateHandoff(fromAgent: string, toAgent: string): boolean {
   const from = MIYABI_AGENTS[fromAgent];
   const to = MIYABI_AGENTS[toAgent];
@@ -305,13 +296,6 @@ describe("Agent Flow Integration Tests", () => {
 
   describe("Escalation (エスカレーション)", () => {
     it("should escalate to しきるん on failure", () => {
-      const failureResult: ThetaCycleResult = {
-        phase: "execute",
-        agent: "kaede",
-        status: "blocked",
-        error: "Technical issue",
-      };
-
       // Escalate to conductor
       const escalation = {
         from: "kaede",

test/integration/githubops.test.ts

@@ -8,10 +8,9 @@
  * 4. PR creation/review
  */
 
-import { describe, it, expect, beforeAll, afterAll, afterEach, vi } from "vitest";
+import { describe, it, expect, beforeAll, afterAll, afterEach } from "vitest";
 import { execSync } from "child_process";
-import { readFileSync, unlinkSync, existsSync } from "fs";
-import { join } from "path";
+import { unlinkSync, existsSync } from "fs";
 
 // Test repository configuration
 const TEST_REPO = process.env.GITHUBOPS_TEST_REPO || "ShunsukeHayashi/dev-workspace";