Problem

1. Database config.yaml settings ignored

getDatabaseUrl() and getDatabaseDialect() in @agor/core/db only read from environment variables (AGOR_DB_DIALECT, DATABASE_URL, AGOR_DB_PATH). The database section in ~/.agor/config.yaml is completely ignored, even though AgorDatabaseSettings types are fully defined.

This means users who configure postgres via config.yaml still get SQLite, leading to confusing SQLITE_BUSY errors.

2. Handlebars dynamic import breaks in bundled UI

SessionPanel.tsx uses await import('handlebars') which returns a module namespace object in ESM/Vite, not the Handlebars object. This causes TypeError: Me.registerHelper is not a function when spawning subsessions.

Fix

Database config

• Wire getDatabaseDialect() to read database.dialect from config.yaml (after env vars)
• Wire getDatabaseUrl() to read database.postgresql.url / database.sqlite.path from config.yaml
• Support building PostgreSQL URL from individual host/port/user/password/database fields
• Env vars still take priority over config.yaml

Handlebars

• Replace dynamic await import('handlebars') with static import Handlebars from 'handlebars'
• Pre-compile template at module load, matching ForkSpawnModal pattern

Config.yaml example

database:
  dialect: postgresql
  postgresql:
    url: postgresql://agor:agor@localhost:55432/agor