feat(阶段1): 搬入 ojnext 为 apps/web，未改业务代码

apps/web/src/oj/store/problem.ts

@@ -0,0 +1,34 @@
+import { defineStore } from "pinia"
+import type { LANGUAGE, Problem } from "utils/types"
+
+export const useProblemStore = defineStore("problem", () => {
+  const problem = ref<Problem | null>(null)
+  const route = useRoute()
+
+  const failCount = ref(0)
+
+  const languages = computed<LANGUAGE[]>(() => {
+    if (route.name === "problem" && problem.value?.allow_flowchart) {
+      return ["Flowchart", ...problem.value?.languages]
+    }
+    return problem.value?.languages ?? []
+  })
+
+  function incrementFailCount() {
+    failCount.value++
+  }
+
+  watch(
+    () => problem.value?.id,
+    () => {
+      failCount.value = 0
+    },
+  )
+
+  return {
+    problem,
+    failCount,
+    languages,
+    incrementFailCount,
+  }
+})