(admin) avoid empty strings in timesheets

pages/admin/timesheets/index.vue

@@ -153,7 +153,7 @@ const sumCells = (area: typeof areas[number] | undefined, month: keyof typeof mo
 <template>
     <Page wide>
         <NotFound v-if="!$isGranted('panel') && !$isGranted('external')" />
-        <div v-else>
+        <form @submit="save" v-else>
             <p class="d-flex justify-content-between">
                 <nuxt-link to="/admin">
                     <Icon v="user-cog" />
@@ -212,6 +212,7 @@ const sumCells = (area: typeof areas[number] | undefined, month: keyof typeof mo
                                     class="form-control form-control-sm"
                                     style="min-width: 3rem"
                                     :disabled="dt(year, +m) < closed || dt(year, +m) > max"
+                                    required
                                     @focus="focusMonth = m;focusArea = areas.indexOf(area)"
                                     @keydown="cellKeydown"
                                 >
@@ -289,10 +290,10 @@ const sumCells = (area: typeof areas[number] | undefined, month: keyof typeof mo
                     <input id="notes" v-model="transferDetails.notes" type="text" class="form-control" placeholder="">
                 </div>
             </section>
-            <button type="button" class="btn btn-primary" :disabled="!transferMethod" @click="save">
+            <button type="submit" class="btn btn-primary" :disabled="!transferMethod">
                 <Icon v="save" />
                 Save
             </button>
-        </div>
+        </form>
     </Page>
 </template>

pages/admin/timesheets/overview.vue

@@ -46,7 +46,7 @@ const hoursSummary = computed((): Record<string, number> => {
                     continue;
                 }
                 for (const h of Object.values(timesheet[parseInt(year)][month])) {
-                    hours += h;
+                    hours += parseInt(h as any);
                 }
             }
         }