Changeset 0.23.1 (#154)

server/database/migrations/sqlite/016_v023_multiuser.sql

@@ -0,0 +1,23 @@
+-- ==========================================
+-- Chat Switchboard — 006 Multi-User: DMs + Channels (SQLite)
+-- ==========================================
+-- SQLite does not support ALTER CONSTRAINT or DROP CONSTRAINT.
+-- The type check is enforced by application logic for SQLite.
+-- ==========================================
+
+-- ── ai_mode ──────────────────────────────────────────────────────────
+-- SQLite ignores CHECK constraints on existing rows; we add the column
+-- and rely on app-layer validation for the enum values.
+ALTER TABLE channels ADD COLUMN ai_mode TEXT NOT NULL DEFAULT 'auto';
+
+-- ── topic ─────────────────────────────────────────────────────────────
+ALTER TABLE channels ADD COLUMN topic TEXT;
+
+-- ── Presence ──────────────────────────────────────────────────────────
+CREATE TABLE IF NOT EXISTS user_presence (
+    user_id     TEXT PRIMARY KEY REFERENCES users(id) ON DELETE CASCADE,
+    last_seen   DATETIME NOT NULL DEFAULT (datetime('now')),
+    status      TEXT NOT NULL DEFAULT 'online'
+);
+
+CREATE INDEX IF NOT EXISTS idx_user_presence_last_seen ON user_presence(last_seen DESC);