fix: repair conversion_crash for feedback 41d6c497

[mdtoword-repair-agent]

Summary

Automated backend repair for conversion_crash feedback 41d6c497.

Deterministic verification

• Baseline failure reproduced: True
• Target test passed: True
• Full backend tests: 55 tests, 0 failures, 0 errors, 0 skipped
• DOCX checks: assert_minimum_math_count
• Changed files: backend/app/normalizer.py, backend/tests/fixtures/feedback/test_feedback_41d6c497_aligned_notag.md, backend/tests/test_feedback_regressions.py

Review metadata

• Risk: medium
• Extension sync required: False
• Graph / Policy: agent-graph-v8 / publication-policy-v6
• Prompts: gate=gate-v7, generate_fix=fix-generation-v3, generate_test=test-generation-v4, plan_reproduction=reproduction-plan-v3
• Provider / Model: openai_compatible / deepseek-ai/DeepSeek-V4-Flash
• Usage: 5 model calls, 20 tool calls, 48146 tokens, estimated cost 0
• Trace: https://jp.cloud.langfuse.com/project/cmsnbl616001kad0inny8xs95/traces/66cdeacf2b10f29b55baae3188109998
• Base SHA: 26b84f794754c70e104b3101dd28b011e620470e
• Validated patch SHA-256: 545904a6c8fd042bb98fdaca10558028921c21623c8f29737d04119e105650ac

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Project	Deployment	Actions	Updated (UTC)
md-to-word	Ready	Preview	Aug 16, 2026 3:10pm