Fix test assertions broken by Chinese translation of source strings

[Copilot]

After translating CLI output strings to Chinese, 16 test assertions across 4 files failed because they still expected English strings.

Updated assertions

• test/core/init.test.ts — error regexes for "no tools detected" and "invalid profile"
• test/core/artifact-graph/instruction-loader.test.ts — artifact-not-found error substring
• test/commands/config-profile.test.ts — workflow diff labels
• test/commands/artifact-workflow.test.ts — 11 assertions: error messages, section headers, status strings

// Before
expect(output).toContain("Schema 'unknown' not found");
expect(result.stdout).toContain('## Apply: apply-change');
expect(result.stdout).toContain('Blocked');
expect(diff.lines).toEqual(['workflows: removed sync']);

// After
expect(output).toContain("未找到架构 'unknown'");
expect(result.stdout).toContain('## 应用： apply-change');
expect(result.stdout).toContain('被阻塞');
expect(diff.lines).toEqual(['工作流：已移除 sync']);

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