fix(server): remove CI-based test exclusions from vitest config

Enable full server test suite (including e2e and integration tests) to
run in CI. Removed conditional exclude logic based on CI env var.

The suite now runs the same tests in CI and locally, maintaining
parallel execution support via forks pool.

packages/server/vitest.config.ts

@@ -1,8 +1,6 @@
 import path from "node:path";
 import { defineConfig } from "vitest/config";
 
-const isCI = process.env.CI === "true";
-
 export default defineConfig({
   resolve: {
     alias: {
@@ -22,18 +20,6 @@ export default defineConfig({
         maxForks: 4,
       },
     },
-    // Skip e2e and integration tests in CI - they require real agent binaries or cross-package imports
-    exclude: isCI
-      ? [
-          "**/*.e2e.test.ts",
-          "**/opencode-agent.test.ts",
-          "**/codex-mcp-agent.test.ts",
-          "**/claude-agent.test.ts",
-          "**/claude-agent-commands.test.ts",
-          "**/worktree.test.ts",
-          "**/terminal-manager.test.ts",
-          "**/node_modules/**",
-        ]
-      : ["**/node_modules/**"],
+    exclude: ["**/node_modules/**"],
   },
 });