v6.4.0

What's Changed

• Remove the App Builder feature by @apocas in #188
• chore(deps): bump echarts from 6.0.0 to 6.1.0 in /frontend by @dependabot[bot] in #187
• chore(deps): bump soupsieve from 2.8.3 to 2.8.4 by @dependabot[bot] in #189
• chore(deps): bump mcp from 1.27.0 to 1.28.1 by @dependabot[bot] in #193
• chore(deps): bump websocket-driver from 0.7.4 to 0.7.5 in /frontend by @dependabot[bot] in #192
• chore(deps-dev): bump transformers from 4.56.2 to 5.5.0 by @dependabot[bot] in #190
• chore(deps): bump axios from 1.16.0 to 1.18.1 in /frontend by @dependabot[bot] in #194
• chore(deps): bump body-parser from 1.20.5 to 1.20.6 in /mobile by @dependabot[bot] in #195
• chore(deps): bump fast-uri from 3.1.2 to 3.1.4 in /mobile by @dependabot[bot] in #196
• chore(deps): bump pyasn1 from 0.6.3 to 0.6.4 by @dependabot[bot] in #198
• chore(deps): bump pypdf from 6.13.3 to 6.14.2 by @dependabot[bot] in #199
• chore(deps): bump httplib2 from 0.31.2 to 0.32.0 by @dependabot[bot] in #200
• chore(deps): bump setuptools from 82.0.1 to 83.0.0 by @dependabot[bot] in #197
• Speed up test suite: share one app startup across all test modules by @apocas in #202
• Speed up test suite 4x; add ruff, backend+frontend test coverage by @apocas in #203
• Frontend test suite (Jest + Testing Library) with coverage by @apocas in #204
• Test coverage expansion: backend 48→62%, frontend 0.9→50%; 13 bug fixes + 8 new bugs documented by @apocas in #205
• Test coverage: backend 48→77%, frontend 19→50%; 17 bugs fixed by @apocas in #206
• Claude/faster tests qwkuwz by @apocas in #207
• chore(deps): bump nltk from 3.9.4 to 3.10.0 by @dependabot[bot] in #201

Full Changelog: v6.3.28...v6.4.0