diff --git a/src/App.vue b/src/App.vue
index 4e88f2a8e..bf0ef6999 100644
--- a/src/App.vue
+++ b/src/App.vue
@@ -28,7 +28,7 @@ const quickLinks = computed(() => {
 
   const userLink = {
     label: isLoggedIn.value
-      ? `${store.$state.data.first_name} ${store.$state.data.last_name}`
+      ? `${store.$state.data?.first_name} ${store.$state.data?.last_name}`
       : 'Se connecter',
     icon: isLoggedIn.value ? 'ri-logout-box-r-line' : 'ri-account-circle-line',
     to: isLoggedIn.value ? '/logout' : '/login',
@@ -106,7 +106,7 @@ const footerMandatoryLinks = ref(config.website.footer_mandatory_links)
     :badge-text="badgeText"
     :badge-style="badgeStyle"
     @search="doSearch"
-    @update:modelValue="updateQuery"
+    @update:model-value="updateQuery"
   >
     <template #mainnav="{ hidemodal }">
       <Navigation :on-click="hidemodal" />
diff --git a/src/custom/ecospheres/views/bouquets/BouquetDetailView.vue b/src/custom/ecospheres/views/bouquets/BouquetDetailView.vue
index ce27c2c3b..ef241f474 100644
--- a/src/custom/ecospheres/views/bouquets/BouquetDetailView.vue
+++ b/src/custom/ecospheres/views/bouquets/BouquetDetailView.vue
@@ -1,22 +1,24 @@
-<script setup>
+<script setup lang="ts">
 import { onMounted, ref, computed } from 'vue'
+import type { Ref } from 'vue'
 import { useLoading } from 'vue-loading-overlay'
-import { useRoute, useRouter } from 'vue-router'
+import { useRouter } from 'vue-router'
 
 import DiscussionsList from '@/components/DiscussionsList.vue'
 import config from '@/config'
-import { Availability, isAvailable } from '@/model'
+import { Availability, isAvailable, type Theme, type Topic } from '@/model'
+import { useRouteParamsAsString } from '@/router/utils'
 import { useTopicStore } from '@/store/TopicStore'
 import { useUserStore } from '@/store/UserStore'
-import { descriptionFromMarkdown } from '@/utils'
+import { descriptionFromMarkdown, fromMarkdown } from '@/utils'
 
-const route = useRoute()
+const route = useRouteParamsAsString()
 const router = useRouter()
 
 const store = useTopicStore()
 const userStore = useUserStore()
 
-const bouquet = ref({})
+const bouquet: Ref<Topic | null> = ref(null)
 const theme = ref()
 const subtheme = ref()
 const loading = useLoading()
@@ -48,25 +50,25 @@ const copyUrl = () => {
   navigator.clipboard.writeText(url)
 }
 
-const getTheme = (themeName) => {
-  return config.themes.find((theme) => theme.name === themeName)
+const getTheme = (themeName: string): Theme => {
+  return config.themes.find((theme: Theme) => theme.name === themeName)
 }
 
-const convertToHex = (hex, color) => {
-  return hex ? `#${parseInt(hex, 16).toString(16).padStart(6, '0')}` : color
+const convertToHex = (hex: string): string => {
+  return `#${parseInt(hex, 16).toString(16).padStart(6, '0')}`
 }
 
-const getThemeColor = (themeName) => {
+const getThemeColor = (themeName: string): string => {
   const theme = getTheme(themeName)
-  return convertToHex(theme ? theme.color : 'transparent')
+  return theme.color ? convertToHex(theme.color) : 'transparent'
 }
 
-const getTextColor = (themeName) => {
+const getTextColor = (themeName: string): string => {
   const theme = getTheme(themeName)
-  return convertToHex(theme ? theme.textColor : '#000000b3')
+  return theme.textColor ? convertToHex(theme.textColor) : '#000000b3'
 }
 
-const getSelectedThemeColor = (themed) => {
+const getSelectedThemeColor = (themed: string) => {
   selectedTheme.value = themed
   return getThemeColor(selectedTheme.value)
 }
@@ -75,7 +77,7 @@ const canCreate = computed(() => {
   return (
     userStore.isAdmin() ||
     (userStore.$state.isLoggedIn &&
-      bouquet.value.owner?.id === userStore.$state.data?.id)
+      bouquet.value?.owner?.id === userStore.$state.data?.id)
   )
 })
 
@@ -85,14 +87,13 @@ onMounted(() => {
     .load(route.params.bid)
     .then((res) => {
       bouquet.value = res
-      theme.value =
-        bouquet.value.extras[`${config.universe.name}:informations`][0].theme
+      theme.value = bouquet.value?.extras['ecospheres:informations'][0].theme
       subtheme.value =
-        bouquet.value.extras[`${config.universe.name}:informations`][0].subtheme
+        bouquet.value?.extras['ecospheres:informations'][0].subtheme
 
       breadcrumbLinks.value.push(
         {
-          text: theme,
+          text: theme.value,
           to: `/bouquets/?theme=${theme.value}`
         },
         {
@@ -100,7 +101,8 @@ onMounted(() => {
           to: `/bouquets/?theme=${theme.value}&subtheme=${subtheme.value}`
         },
         {
-          text: bouquet.value.name
+          to: '',
+          text: bouquet.value?.name ?? ''
         }
       )
     })
@@ -132,9 +134,9 @@ onMounted(() => {
     </DsfrButton>
     <div class="bouquet__header fr-mb-4w">
       <div class="bouquet__header__left">
-        <h3 class="fr-mb-3w fr-mb-md-0 fr-mr-md-3w">{{ bouquet.name }}</h3>
+        <h3 class="fr-mb-3w fr-mb-md-0 fr-mr-md-3w">{{ bouquet?.name }}</h3>
         <DsfrTag
-          v-if="bouquet.extras"
+          v-if="bouquet?.extras"
           class="fr-mb-3w fr-mb-md-0 bold uppercase"
           :label="subtheme"
           :style="{
@@ -156,20 +158,18 @@ onMounted(() => {
       <div v-html="description" />
       <div
         v-if="
-          bouquet.extras &&
-          bouquet.extras[`${config.universe.name}:datasets_properties`]
+          bouquet?.extras && bouquet.extras['ecospheres:datasets_properties']
         "
       >
         <h5>
           Données utilisées ({{
-            bouquet.extras[`${config.universe.name}:datasets_properties`]
-              .length
+            bouquet?.extras['ecospheres:datasets_properties'].length
           }})
         </h5>
         <DsfrAccordionsGroup>
           <li
-            v-for="(datasetProperties, idx) in bouquet.extras[
-              `${config.universe.name}:datasets_properties`
+            v-for="(datasetProperties, idx) in bouquet?.extras[
+              'ecospheres:datasets_properties'
             ]"
             :key="idx"
           >
@@ -191,7 +191,8 @@ onMounted(() => {
                 }`"
               />
               <div class="fr-mb-3w">
-                {{ datasetProperties.description }}
+                <!-- eslint-disable-next-line vue/no-v-html -->
+                <span v-html="fromMarkdown(datasetProperties.purpose)"></span>
               </div>
               <div class="button__wrapper">
                 <a
@@ -204,7 +205,7 @@ onMounted(() => {
                 <a
                   v-else
                   class="fr-btn fr-btn--secondary inline-flex"
-                  :href="datasetProperties.uri"
+                  :href="datasetProperties.uri ?? undefined"
                   target="_blank"
                   >Accéder au catalogue</a
                 >
@@ -226,7 +227,7 @@ onMounted(() => {
 
     <div class="fr-mt-8w">
       <DiscussionsList
-        v-if="showDiscussions"
+        v-if="showDiscussions && bouquet"
         :subject="bouquet"
         subject-class="Topic"
       />
diff --git a/src/model/index.ts b/src/model/index.ts
index 299703fef..0897cf194 100644
--- a/src/model/index.ts
+++ b/src/model/index.ts
@@ -1,9 +1,11 @@
+import type { Owned } from '@etalab/data.gouv.fr-components'
+
 interface DatasetProperties {
   title: string
   purpose: string
   uri: string | null
   id: string | null
-  availability: string // must be one of Availability value
+  availability: Availability
 }
 
 enum Availability {
@@ -23,6 +25,7 @@ interface Theme {
   name: string
   color: string
   subthemes: Subtheme[]
+  textColor?: string
 }
 
 interface Subtheme {
@@ -64,15 +67,13 @@ interface TopicExtras {
   ['ecospheres:datasets_properties']: DatasetProperties[]
 }
 
-interface Topic {
+type Topic = Owned & {
   name: string
   description: string
   created_at: string
   extras: TopicExtras
   featured: boolean
   id: string
-  organisation: any
-  owner: any
   page: string
   private: boolean
   reuses: []
diff --git a/src/store/TopicStore.js b/src/store/TopicStore.ts
similarity index 72%
rename from src/store/TopicStore.js
rename to src/store/TopicStore.ts
index c6b38fdbb..74812edf2 100644
--- a/src/store/TopicStore.js
+++ b/src/store/TopicStore.ts
@@ -1,23 +1,26 @@
 import { defineStore } from 'pinia'
 
 import config from '@/config'
+import type { Topic } from '@/model'
 
 import TopicsAPI from '../services/api/resources/TopicsAPI'
 
 const topicsAPI = new TopicsAPI()
 const topicsAPIv2 = new TopicsAPI({ version: 2 })
 
+export interface RootState {
+  data: Topic[]
+}
+
 export const useTopicStore = defineStore('topic', {
-  state: () => ({
+  state: (): RootState => ({
     data: []
   }),
   actions: {
     /**
      * Load topics to store from a list of ids and API
-     *
-     * @param {*} topics
      */
-    async loadTopicsFromList(topics) {
+    async loadTopicsFromList(topics: Topic[]) {
       this.data = []
       for (const topic of topics) {
         const res = await topicsAPI.get(topic.id)
@@ -26,26 +29,21 @@ export const useTopicStore = defineStore('topic', {
     },
     /**
      * Filter a list of topics related to the current universe
-     *
-     * @param {Array} topics
-     * @returns {Array}
      */
-    filter(topics) {
+    filter(topics: Topic[]) {
       return topics.filter((topic) => topic.id !== config.universe.topic_id)
     },
     /**
      * Load universe related topics from API
-     *
-     * @returns {Promise<object[]>}
      */
-    async loadTopicsForUniverse() {
+    async loadTopicsForUniverse(): Promise<Topic[]> {
       if (this.data.length > 0) return this.data
       let response = await topicsAPIv2.list({
         page_size: config.website.pagination_sizes.topics_list,
         tag: config.universe.name
       })
       this.data = this.filter(response.data)
-      while (response.next_page) {
+      while (response.next_page !== null) {
         response = await topicsAPIv2.request({
           url: response.next_page,
           method: 'get'
@@ -56,43 +54,30 @@ export const useTopicStore = defineStore('topic', {
     },
     /**
      * Get a topic from store
-     *
-     * @param {string} slugOrId
-     * @returns {object}
      */
-    get(slugOrId) {
+    get(slugOrId: string): Topic | undefined {
       return this.data.find((b) => b.slug === slugOrId || b.id === slugOrId)
     },
     /**
      * Get a single topic from store or API
-     *
-     * @param {string} slugOrId
-     * @returns {object}
      */
-    async load(slugOrId) {
+    async load(slugOrId: string) {
       const existing = this.get(slugOrId)
-      if (existing) return existing
+      if (existing !== undefined) return existing
       return await topicsAPIv2.get(slugOrId)
     },
     /**
      * Create a topic
-     *
-     * @param {object} topic
-     * @returns {object}
      */
-    async create(topic) {
+    async create(topic: Topic): Promise<Topic> {
       const res = await topicsAPI.create(topic)
       this.data.push(res)
       return res
     },
     /**
      * Update a topic
-     *
-     * @param {string} topicId
-     * @param {object} data
-     * @returns {object}
      */
-    async update(topicId, data) {
+    async update(topicId: string, data: Topic): Promise<Topic> {
       const res = await topicsAPI.update(topicId, data)
       const idx = this.data.findIndex((b) => b.id === topicId)
       this.data[idx] = res
diff --git a/src/store/UserStore.js b/src/store/UserStore.ts
similarity index 75%
rename from src/store/UserStore.js
rename to src/store/UserStore.ts
index 0dfd64902..038833443 100644
--- a/src/store/UserStore.js
+++ b/src/store/UserStore.ts
@@ -1,3 +1,4 @@
+import type { User } from '@etalab/data.gouv.fr-components'
 import { defineStore } from 'pinia'
 
 // FIXME: we cant use UserAPI here (circular dep?)
@@ -5,11 +6,17 @@ import { defineStore } from 'pinia'
 
 const STORAGE_KEY = 'token'
 
+export interface RootState {
+  isLoggedIn: boolean
+  token: string | null
+  data: User | null
+}
+
 export const useUserStore = defineStore('user', {
-  state: () => ({
+  state: (): RootState => ({
     isLoggedIn: false,
-    data: {},
-    token: undefined
+    data: null,
+    token: null
   }),
   getters: {
     loggedIn(state) {
@@ -22,7 +29,7 @@ export const useUserStore = defineStore('user', {
      */
     init() {
       const token = localStorage.getItem(STORAGE_KEY)
-      if (token) {
+      if (token !== null) {
         this.token = token
         this.isLoggedIn = true
       }
@@ -30,7 +37,7 @@ export const useUserStore = defineStore('user', {
     /**
      * Store user info after login
      */
-    login(token) {
+    login(token: string) {
       this.isLoggedIn = true
       this.token = token
       localStorage.setItem(STORAGE_KEY, token)
@@ -40,14 +47,14 @@ export const useUserStore = defineStore('user', {
      */
     logout() {
       this.isLoggedIn = false
-      this.token = undefined
-      this.data = {}
+      this.token = null
+      this.data = null
       localStorage.removeItem(STORAGE_KEY)
     },
     /**
      * Store user infos
      */
-    storeInfo(data) {
+    storeInfo(data: User) {
       this.data = data
     },
     /**
diff --git a/src/utils/index.js b/src/utils/index.js
index f260b9d76..5834f17c8 100644
--- a/src/utils/index.js
+++ b/src/utils/index.js
@@ -19,6 +19,7 @@ export const descriptionFromMarkdown = (ref, attr = 'description') => {
  * @param {string} value
  */
 export const fromMarkdown = (value) => {
+  if (!value) return ''
   const parsed = marked.parse(value, { mangle: false, headerIds: false })
   return DOMPurify.sanitize(parsed)
 }