v1.8.0 — In-game power-ups, native-language tutoring, service hardening

[InfinityZero3000]

Summary

Batch release v1.8.0 spanning all four services. Reviewed for correctness/logic and verified against the local test suites (backend pytest, flutter analyze+test, admin build+vitest, AI focused tests).

AI service

• Native-language tutoring: native_language (ISO 639-1) threaded through the lexi-chat request, idempotency hash, and all orchestrator calls (primary/retry/stream) via iso_to_language_name.
• STT: drop filler-only utterances and dedup leading repeated n-grams (Moonshine hallucination artifact).
• Groq key pool: round-robin fallback over all GROQ_API_KEYS when the Redis pool isn't initialized.
• TRACE-CAG refinements + benchmark fixes; tracecag service packaging docs.

Backend

• Game power-ups: 10 new consumable shop items + idempotent alembic upsert migration; _handle_instant_game_powerup echoes the effects payload (no server state); cosmetics rejected from the use endpoint.
• Idempotent daily-challenge claims via ChallengeRewardClaim unique index + single transaction (add_gems(commit=False)).
• Admin shop CRUD moved to JSON body (ShopItemAdminCreate/Update) with effects/icon_url.
• Services package: achievement checker split into its own module with lazy __getattr__ (backward compatible).
• Schemas migrated to Pydantic v2 (ConfigDict/field_validator) + guard test.
• quota_manager: UTC-keyed quotas + input validation.

Admin

• Shop CRUD sends JSON body with effects/icon_url; item-type list + quick-create templates mirror the backend catalog; en/vi i18n.

Flutter

• In-game power-up tray wired into all 6 mini-games; native-language chat plumbing; league ceremony redesign; gamification entity/provider updates.

Test fixes included

• test_admin_rbac_security.py: create-shop test now sends a JSON body to match the new contract.
• test_dependency_constraints.py: synced expected torch/moonshine/sherpa pins to the already-merged Dependabot bumps (was pre-existing red on dev).

Verification

• Backend: 1221 passed (Postgres 16).
• Flutter: analyze clean + full test suite green.
• Admin: build/typecheck + vitest green.
• AI: focused STT + TRACE-CAG suites green (146 + 82 + dependency constraints).

Note: base dev was 10 commits behind local dev, so this PR also carries those previously-committed dev commits.

🤖 Generated with Claude Code

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2 Skipped Deployments

Project	Deployment	Actions	Updated (UTC)
lexilingo-admin	Ignored		Jul 6, 2026 11:57am
lexilingo-app	Ignored		Jul 6, 2026 11:57am

[github-actions]

❌ PR-Agent failed to apply 'local' repo settings

The configuration file needs to be a valid TOML, please fix it.

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