docs: add EAGLE-design-handoff.md to main

chore(screenshots): add demo transcript and test screenshots from E2E runs

feat(docs): workspace DOCX/PDF export, auto-save sessionStorage, demo Step 5 with real S3 data

feat(skill): add repo-keyed config to mvp1-eval skill

test(demo): add demo transcript screenshots from acquisition intake flow

refactor(prompt): slim supervisor system prompt from 27K to 9K chars

feat(skill): add Langfuse trace report suite to mvp1-eval

fix+feat(tests+skill): fix 3 test flakes, add mvp1-eval skill

Merge remote-tracking branch 'upstream/report/acquisition-package-eval-2026-03-16'

docs(report): acquisition package eval — 111 tests, Hub drift analysis, SSE wiring context

docs+fix(reports+ui+tools): dev activity report, API endpoints doc, README update, chat layout fix, think tool

feat(langfuse+traces+tools): OTEL exporter refactor, trace enrichment, native tool factories

chore(experts): self-improve frontend, backend, sse, git expertise after session

feat(arch+ui): regenerate all 9 excalidraw diagrams, Package tab, and route additions

chore: add implementation specs and tsconfig build cache