v1.8.0

Provider-agnostic tier model + canonical billing-tier consolidation. 16 commits since v1.7.9.

Breaking

• Provider-agnostic model-tier names (#639). opus/sonnet/haiku → deep/balanced/fast. Legacy names still accepted and normalized via normalizeTier — existing config.json + LYNOX_DEFAULT_TIER/LYNOX_MAX_TIER keep working.
• Billing-tier rename starter → hosted + eu retired (#647). Canonical billing-tier SoT across web-ui/engine/CP; starter/eu accepted as legacy aliases. Managed applies migration 0029_rename_tier_hosted.

Added

• Opt-in chat diagnostics panel — per-message metrics (#643)
• JSON export in thread kebab menu (#636)
• /api/config surfaces effective active provider when env-pinned (#646)

Changed

• Mistral tier refresh (#644): deep=mistral-large-2512, balanced=ministral-14b-2512; magistral dropped (retires 2026-07-31) + Set-Bench fairness pass
• Provider tiles read-only + tailored banner when env-pinned (#645)
• Provider-switch hardening (#641, #642)
• Tightened read_file/http context caps + api_setup source-domain filter (#637)
• Grounding prompt splits knowledge by verification source (#638)

Removed

• Retired pipelineStatusV2 knob (#635)