Remove recordings feature, replay sessions directly, bump to 0.6.0

Recordings were just a thin named pointer over an already-captured
session's events, so the whole separate feature (recordings table, API
routes, pages, UI) is gone: any completed session can now be named and
replayed directly. Replaying no longer creates a session or duplicates
events of its own - it just bumps the source session's playCount/lastPlayedAt.

Also renames play_sessions/playSession(s) to sessions/session(s) throughout
the schema, queries, API routes, and UI for consistency, and updates the
README to match the new flow.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

lib/db/queries/sessions.ts

@@ -0,0 +1,178 @@
+import { desc, eq, sql } from "drizzle-orm";
+import { db } from "@/lib/db/client";
+import { sessions, sessionDevices, devices } from "@/lib/db/schema";
+import { upsertDeviceByBleName } from "./devices";
+import { getEventsForSession } from "./session-events";
+import type { DeviceCapabilities } from "@/lib/db/schema";
+import type { ReplayDeviceSlot } from "@/lib/buttplug/types";
+import { PAGE_SIZE, type Page } from "@/lib/pagination";
+
+export interface StartSessionDeviceInput {
+  slotLabel: string;
+  bleName: string;
+  deviceClass?: string | null;
+  capabilities?: DeviceCapabilities;
+}
+
+export interface StartSessionInput {
+  name?: string;
+  devices: StartSessionDeviceInput[];
+}
+
+/**
+ * Starts a live control session. Replaying an existing session does NOT go
+ * through here - it just plays back the source session's already-recorded
+ * events against newly-mapped devices (see components/sessions/ReplayPlayer)
+ * and bumps the source's playCount/lastPlayedAt (incrementSessionPlayCount)
+ * without creating a session or duplicate events of its own.
+ */
+export async function startSession(input: StartSessionInput) {
+  const now = Date.now();
+
+  const [session] = await db
+    .insert(sessions)
+    .values({
+      kind: "live",
+      name: input.name,
+      status: "active",
+      startedAt: now,
+    })
+    .returning();
+
+  const sessionDeviceRows = [];
+  for (const d of input.devices) {
+    const device = await upsertDeviceByBleName({
+      bleName: d.bleName,
+      deviceClass: d.deviceClass,
+      capabilities: d.capabilities,
+    });
+    const [sessionDevice] = await db
+      .insert(sessionDevices)
+      .values({
+        sessionId: session.id,
+        deviceId: device.id,
+        slotLabel: d.slotLabel,
+        connectedAt: now,
+      })
+      .returning();
+    sessionDeviceRows.push(sessionDevice);
+  }
+
+  return { session, sessionDevices: sessionDeviceRows };
+}
+
+export async function endSession(
+  id: number,
+  input: { status: "completed" | "aborted" },
+) {
+  const [existing] = await db.select().from(sessions).where(eq(sessions.id, id));
+  if (!existing) return undefined;
+
+  const endedAt = Date.now();
+  const durationMs = endedAt - existing.startedAt;
+
+  await db
+    .update(sessionDevices)
+    .set({ disconnectedAt: endedAt })
+    .where(eq(sessionDevices.sessionId, id));
+
+  const [updated] = await db
+    .update(sessions)
+    .set({ endedAt, durationMs, status: input.status })
+    .where(eq(sessions.id, id))
+    .returning();
+  return updated;
+}
+
+export async function listSessions() {
+  return db.select().from(sessions).orderBy(sessions.startedAt);
+}
+
+export async function listSessionsPage(page: number, pageSize = PAGE_SIZE): Promise<Page<typeof sessions.$inferSelect>> {
+  const [{ count }] = await db.select({ count: sql<number>`count(*)` }).from(sessions);
+  const items = await db
+    .select()
+    .from(sessions)
+    .orderBy(desc(sessions.startedAt))
+    .limit(pageSize)
+    .offset((page - 1) * pageSize);
+  return { items, page, pageSize, total: count };
+}
+
+/** Lightweight name-only lookup for page titles - avoids getSessionDetail's device join. */
+export async function getSessionName(id: number): Promise<string | null | undefined> {
+  const [row] = await db.select({ name: sessions.name }).from(sessions).where(eq(sessions.id, id));
+  return row?.name;
+}
+
+export async function getSessionDetail(id: number) {
+  const [session] = await db.select().from(sessions).where(eq(sessions.id, id));
+  if (!session) return undefined;
+
+  const sessionDeviceRows = await db
+    .select({
+      id: sessionDevices.id,
+      slotLabel: sessionDevices.slotLabel,
+      connectedAt: sessionDevices.connectedAt,
+      disconnectedAt: sessionDevices.disconnectedAt,
+      deviceId: devices.id,
+      deviceDisplayName: devices.displayName,
+      deviceBleName: devices.bleName,
+    })
+    .from(sessionDevices)
+    .innerJoin(devices, eq(sessionDevices.deviceId, devices.id))
+    .where(eq(sessionDevices.sessionId, id));
+
+  const replayedFromName = session.replayedSessionId ? await getSessionName(session.replayedSessionId) : undefined;
+
+  return { session, devices: sessionDeviceRows, replayedFromName };
+}
+
+/** Snapshot of a session's devices, shaped for the replay device-remap UI - computed live
+ *  from session_devices/devices, not a frozen copy (see ReplayDeviceSlot). */
+export async function getSessionForReplay(id: number) {
+  const [session] = await db.select().from(sessions).where(eq(sessions.id, id));
+  if (!session) return undefined;
+
+  const deviceSlotRows = await db
+    .select({
+      sessionDeviceId: sessionDevices.id,
+      slotLabel: sessionDevices.slotLabel,
+      bleName: devices.bleName,
+      deviceClass: devices.deviceClass,
+      capabilities: devices.capabilities,
+    })
+    .from(sessionDevices)
+    .innerJoin(devices, eq(sessionDevices.deviceId, devices.id))
+    .where(eq(sessionDevices.sessionId, id));
+
+  const deviceSlots: ReplayDeviceSlot[] = deviceSlotRows.map((row) => ({
+    slotLabel: row.slotLabel,
+    recordedBleName: row.bleName,
+    deviceClass: row.deviceClass,
+    capabilities: row.capabilities,
+    sourceSessionDeviceId: row.sessionDeviceId,
+  }));
+
+  const events = await getEventsForSession(id);
+
+  return { session, deviceSlots, events };
+}
+
+export async function renameSession(id: number, input: { name?: string; description?: string }) {
+  const [updated] = await db.update(sessions).set(input).where(eq(sessions.id, id)).returning();
+  return updated;
+}
+
+export async function incrementSessionPlayCount(id: number, playedAt: number): Promise<void> {
+  const [existing] = await db.select().from(sessions).where(eq(sessions.id, id));
+  if (!existing) return;
+  await db
+    .update(sessions)
+    .set({ playCount: existing.playCount + 1, lastPlayedAt: playedAt })
+    .where(eq(sessions.id, id));
+}
+
+export async function deleteSession(id: number) {
+  await db.delete(sessions).where(eq(sessions.id, id));
+}