fix: pin new capture to top of Just Added feed regardless of server clock skew

fix: delete button in detail view, persist AgentGuess IDs across refresh

fix: exclude failed captures from graph view

feat: show error messages when AI model unavailable in BRIEF and ASK

fix: BRIEF today timezone, exclude failed captures from digest

feat: show error toast when capture processing fails

fix: recover AgentGuess on page refresh

fix: delete button on failed capture cards

feat: better ASK suggestions matching seed content

fix: review queue requires recall_question, delete only removes UI on success

fix: embed device=cpu, VL model class, file input reset

fix: rebuild static with _app assets dir, remove old assets/

feat: sync all features from local-guide — BRIEF synthesis, REVIEW, weekly thread, unified lm.py, new frontend build

feat: add backend, frontend, seed data, and HF Spaces wiring