headquarter/openspec/changes/archive/2025-05-18-user-config-management/proposal.md

Why

Users need to store preferences and settings (theme, editor, git identity) that persist across sessions.

What Changes

• Add UserConfig model for JSONB key-value storage
• Add API endpoints for get/update user config
• Add frontend settings page
• Apply theme preference in frontend

Capabilities

New Capabilities

• user-config-management: Store and manage user preferences

Modified Capabilities

• user-profile: Include config in profile responses

Impact

• New database model and migration
• New API endpoints under /users/me/config
• New frontend settings page
• Theme application in AppShell