Changed
- Documentation synced with changelog v0.45.0–v0.55.16:
SPEC.mdaddsoidc_sub/oidc_providercolumns to the Users table and documents the SSO login flow (Authorization Code + PKCE, nonce) and failed-login warning logging;docs/installation.mdaddsTRUST_PROXYto the Server section,DATA_DIR/BACKUP_DIRto the Database section, a new SSO/OIDC env-var section, a new Automated Backups env-var section, and a legacy note on the Apple CalDAV single-account variables;README.mdadds SSO/OpenID Connect to the Design & Technology section;docs/index.htmlupdates the version badge and footer to v0.55.16 and corrects the birthday feature description to mention customizable reminders;docs/install.htmlupdates the Calendar Sync optional card to reflect multi-account CalDAV/CardDAV, adds an SSO/OIDC optional card, updates the Automated Backups card to describe the built-in scheduler, and keeps EN and DE i18n strings in sync.