refactor: rewrite session store using pinia and fix start button

app/src/utils/api.ts

@@ -1,4 +1,7 @@
 import axios from 'axios'
+import { IQuest } from '@linux-odyssey/models'
+import { GetSessionsRequest } from '@linux-odyssey/constants'
+import { Session } from '../types'
 import { UserProfile } from '../store/userProfile'
 
 const api = axios.create({
@@ -14,3 +17,20 @@ export async function getUserProfile(): Promise<UserProfile> {
   const res = await api.get<UserProfile>('/users/me')
   return res.data
 }
+
+export async function getQuest(id: string): Promise<IQuest> {
+  const res = await api.get<IQuest>(`/quests/${id}`)
+  return res.data
+}
+
+export async function createSession(questId: string): Promise<Session> {
+  const res = await api.post<Session>('/sessions', { questId })
+  return res.data
+}
+
+export async function getSessions(
+  request: GetSessionsRequest
+): Promise<Session[]> {
+  const res = await api.get<Session[]>('/sessions', { params: request })
+  return res.data
+}