Refactor API to use nested sessions/devices routers and fix test infrastructure

- Update API contract to use nested router structure for sessions and devices
  (me.sessions.list, me.devices.getInfo, etc.)
- Update frontend Svelte components to use new nested API paths
- Fix test assertion patterns for consistency (remove async () => wrappers)
- Fix test-db.ts findRepoRoot to use existsSync for directory checking
  (Bun.file().exists() returns false for directories)
- Add ESLint config override for test files to handle expect().rejects patterns

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

apps/api-server/src/procedures/me/sessions.ts

@@ -11,7 +11,7 @@ import { authMiddleware, os } from "../base.js";
  * - Returns all sessions for the current user
  * - Includes isCurrent flag to identify active session
  */
-export const listSessions = os.me.listSessions
+export const listSessions = os.me.sessions.list
   .use(authMiddleware)
   .handler(async ({ context }) => {
     const sessions = await context.db
@@ -42,7 +42,7 @@ export const listSessions = os.me.listSessions
  * @throws NOT_FOUND if session doesn't exist
  * @throws BAD_REQUEST if trying to revoke current session
  */
-export const revokeSession = os.me.revokeSession
+export const revokeSession = os.me.sessions.revoke
   .use(authMiddleware)
   .handler(async ({ input, context }) => {
     const { sessionId } = input;
@@ -65,6 +65,8 @@ export const revokeSession = os.me.revokeSession
     if (!result.numUpdatedRows || result.numUpdatedRows === 0n) {
       throw new ORPCError("NOT_FOUND", { message: "Session not found" });
     }
+
+    return { success: true };
   });
 
 /**
@@ -72,7 +74,7 @@ export const revokeSession = os.me.revokeSession
  * - Requires authentication
  * - Revokes all sessions except current
  */
-export const revokeAllSessions = os.me.revokeAllSessions
+export const revokeAllSessions = os.me.sessions.revokeAll
   .use(authMiddleware)
   .handler(async ({ context }) => {
     // Revoke all sessions except current
@@ -83,4 +85,6 @@ export const revokeAllSessions = os.me.revokeAllSessions
       .where("id", "!=", context.session.id)
       .where("revoked_at", "is", null)
       .execute();
+
+    return { success: true };
   });