MS4 (#27/#28) — group questions + concepts under learning-map modules#6
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MS4 final item, per REVIEW-012. The five surfaces were siloed: explain-back questions and DSA concepts were flat lists with no link to the learning-map modules. Now every question and concept carries a stable module key, so the learning map shows what belongs to each module. - schema: soft `module_key` column on explain_back_questions + concept_links (migration 0010, nullable — manual entries stay null). - learning-map.service: modules gain a stable `key` slug; `moduleKeyForTitle` backfills it for pre-existing maps (grouping works retroactively). Exported MODULE_KEYS. - project-analyzer: deterministic tagging that works on BOTH the AI and the offline-heuristic paths (no AI-schema dependency) — questions via an inferQuestionModuleKey keyword classifier; code-grounded concepts → key-files; conceptual concepts → how-it-works. - learning-map page + ModuleCard: each module card links to its N questions / M concepts on the explain-back and DSA tabs. - tests: questions + concepts are tagged with valid keys; code-grounded concepts land under key-files; modules carry stable keys. Suite 22/22. Gate: lint + typecheck + build + test all green. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
…12 resolved) Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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Final MS4 item (REVIEW-012). Links the previously-siloed surfaces: explain-back questions and DSA concepts now carry a stable module key, so the learning map shows what belongs to each module.
What's in it
module_keyonexplain_back_questions+concept_links(migration 0010, nullable).keyslug;moduleKeyForTitlebackfills it for pre-existing maps so grouping works retroactively.key-files; conceptual concepts →how-it-works.Design note
Deliberately deterministic (not an AI-schema field) so the value lands on the offline analyzer — the product's default path — not just BYOK-AI users.
Gate: lint + typecheck + build + test (22/22) all green.
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