Implement frontend session routing flow

- Validate and prepare access links in apps/frontend
- Add session, ended, and unauthorized routes with polling
- Copy full public access URLs from the admin links page

packages/logic/domains/link/controller.ts

@@ -1,8 +1,3 @@
-import { errAsync, ResultAsync } from "neverthrow";
-import { nanoid } from "nanoid";
-import { db } from "@pkg/db";
-import { type Err } from "@pkg/result";
-import { FlowExecCtx } from "@core/flow.execution.context";
 import {
     CreateLink,
     Link,
@@ -10,8 +5,13 @@ import {
     LinkWithDevice,
     UpdateLink,
 } from "./data";
+import { FlowExecCtx } from "@core/flow.execution.context";
+import { errAsync, ResultAsync } from "neverthrow";
 import { LinkRepository } from "./repository";
+import { type Err } from "@pkg/result";
 import { linkErrors } from "./errors";
+import { nanoid } from "nanoid";
+import { db } from "@pkg/db";
 
 export class LinkController {
     constructor(private repo: LinkRepository) {}
@@ -26,9 +26,12 @@ export class LinkController {
 
     /**
      * Fetch a link by its URL token, including the joined device.
-     * Used by apps/front to validate and resolve an incoming link.
+     * Used by apps/frontend to validate and resolve an incoming link.
      */
-    getByToken(fctx: FlowExecCtx, token: string): ResultAsync<LinkWithDevice, Err> {
+    getByToken(
+        fctx: FlowExecCtx,
+        token: string,
+    ): ResultAsync<LinkWithDevice, Err> {
         return this.repo.getByToken(fctx, token);
     }
 
@@ -36,7 +39,10 @@ export class LinkController {
      * Validate a token: must exist, be active, and not be expired.
      * Returns the resolved link+device on success.
      */
-    validate(fctx: FlowExecCtx, token: string): ResultAsync<LinkWithDevice, Err> {
+    validate(
+        fctx: FlowExecCtx,
+        token: string,
+    ): ResultAsync<LinkWithDevice, Err> {
         return this.repo.getByToken(fctx, token).andThen((l) => {
             if (l.status !== LinkStatus.ACTIVE) {
                 return errAsync(linkErrors.linkNotActive(fctx, token));