fix: raise synthesis max_tokens to 64000 and surface truncation explicitly

fix: keep fail-closed per fact but stop zero-verified synthesis from emptying the whole brief

feat: merge Company Overview generation into single synthesis call

feat: multi-provider LLM support, prominent chat, design pass, and new analytics

feat: embed synthesis language in brief dict

chore: checkpoint sidebar nav + i18n work-in-progress before Decision Stack redesign

fix: harden _extract_json — use raw_decode to ignore trailing JSON objects and prose

feat: Analyst Edge layer — deterministic text delta signals (Phase 0+1)

fix: insert stub ToolMessages when round cap hit mid-tool-call

fix: retry on overloaded_error + friendlier API error messages

fix: background generation, parallel tools, prompt caching, Tavily cache

deploy: Primer app for HF Spaces — clean orphan history