feat: persist link share auth rule in url hash

This allows sharing links to a task directly. We're using hashes instead
of query parameters because hash values are usually not logged in access
logs.

With this change, when a user uses a link share, the link share hash
will be appended to all urls while browsing. When a link share hash is
encountered in the current url and the user is not authenticated, they
will be redirected to the link share auth page, get authenticated and
then get redirected to whatever url they were previously on.

src/router/index.ts

@@ -6,6 +6,7 @@ import {saveProjectView, getProjectView} from '@/helpers/projectView'
 import {parseDateOrString} from '@/helpers/time/parseDateOrString'
 import {getNextWeekDate} from '@/helpers/time/getNextWeekDate'
 import {setTitle} from '@/helpers/setTitle'
+import {getToken} from '@/helpers/auth'
 
 import {useProjectStore} from '@/stores/projects'
 import {useAuthStore} from '@/stores/auth'
@@ -71,6 +72,8 @@ const NewProjectComponent = () => import('@/views/project/NewProject.vue')
 const EditTeamComponent = () => import('@/views/teams/EditTeam.vue')
 const NewTeamComponent = () =>  import('@/views/teams/NewTeam.vue')
 
+const linkShareHashPrefix = '#linkshare='
+
 const router = createRouter({
 	history: createWebHistory(import.meta.env.BASE_URL),
 	scrollBehavior(to, from, savedPosition) {
@@ -80,7 +83,7 @@ const router = createRouter({
 		}
 
 		// Scroll to anchor should still work
-		if (to.hash) {
+		if (to.hash && !to.hash.startsWith(linkShareHashPrefix)) {
 			return {el: to.hash}
 		}
 
@@ -482,8 +485,36 @@ export async function getAuthForRoute(route: RouteLocation) {
 	}
 }
 
-router.beforeEach(async (to) => {
-	return getAuthForRoute(to)
+router.beforeEach(async (to, from) => {
+	
+	if(from.hash && from.hash.startsWith(linkShareHashPrefix)) {
+		to.hash = from.hash
+	}
+	
+	if (to.hash.startsWith(linkShareHashPrefix)) {
+		const currentAuthToken = getToken()
+		if (currentAuthToken === null) {
+			saveLastVisited(to.name as string, to.params, to.query)
+			return {
+				name: 'link-share.auth',
+				params: {
+					share: to.hash.replace(linkShareHashPrefix, ''),
+				},
+			}
+		}
+	}
+	
+	const newRoute = await getAuthForRoute(to)
+	if(newRoute) {
+		return {
+			...newRoute,
+			hash: to.hash,
+		}
+	}
+	
+	if(!to.fullPath.endsWith(to.hash)) {
+		return to.fullPath + to.hash
+	}
 })
 
 export default router