feat(web): wire canvas/channels dashboard routers

Canvas/Channels called dashboards.list (and canvasData/canvasTemplates/
channelTasks), but the web host router never exposed those routers, so
they NOT_FOUND'd at call time — e.g. deleting a context failed with "No
query-procedure on path dashboards.list".

Load canvasCoreModule in the web container (its services only need
AuthService + fetch to the PostHog desktop_file_system API — no Node
backend) and mount the four real host-router canvas routers, mirroring
desktop.

Generated-By: PostHog Code
Task-Id: 77d13a30-444d-4045-9d80-5e2a9f2e68ae

Author: gantoine

apps/web/src/web-container.ts

@@ -26,6 +26,7 @@ import {
   type IAuthSessionStore,
   type IAuthTokenCipher,
 } from "@posthog/core/auth/identifiers";
+import { canvasCoreModule } from "@posthog/core/canvas/canvas.module";
 import type { CloudTaskService } from "@posthog/core/cloud-task/cloud-task";
 import { cloudTaskModule } from "@posthog/core/cloud-task/cloud-task.module";
 import {
@@ -453,6 +454,12 @@ container.bind(CLOUD_TASK_AUTH).toDynamicValue((ctx) => ({
   },
 }));
 
+// ── Canvas / Channels: host-agnostic dashboard + freeform canvas services ──
+// They only need AuthService + fetch (they reach the PostHog desktop_file_system
+// API), so the web host binds them by loading the same core module desktop does;
+// the web host router forwards its canvas routers to these.
+container.load(canvasCoreModule);
+
 // SessionService is built from host-agnostic deps (host tRPC client + UI
 // stores) — same construction the desktop renderer uses.
 container

apps/web/src/web-host-router.ts

@@ -3,7 +3,11 @@ import type { TeamSkillsService } from "@posthog/core/skills/teamSkillsService";
 import { resolveService } from "@posthog/di/container";
 import { analyticsRouter } from "@posthog/host-router/routers/analytics.router";
 import { authRouter } from "@posthog/host-router/routers/auth.router";
+import { canvasDataRouter } from "@posthog/host-router/routers/canvas-data.router";
+import { canvasTemplatesRouter } from "@posthog/host-router/routers/canvas-templates.router";
+import { channelTasksRouter } from "@posthog/host-router/routers/channel-tasks.router";
 import { cloudTaskRouter } from "@posthog/host-router/routers/cloud-task.router";
+import { dashboardsRouter } from "@posthog/host-router/routers/dashboards.router";
 import { publicProcedure, router } from "@posthog/host-trpc/trpc";
 import {
   type CloudRegion,
@@ -465,7 +469,14 @@ export const webHostRouter = router({
   archive: archiveStubRouter,
   auth: authRouter,
   browserTabs: browserTabsRouter,
+  // Canvas / Channels: real host-router routers over the host-agnostic canvas
+  // core services (bound via canvasCoreModule in web-container), which reach the
+  // PostHog desktop_file_system API through authenticatedFetch — no Node backend.
+  canvasData: canvasDataRouter,
+  canvasTemplates: canvasTemplatesRouter,
+  channelTasks: channelTasksRouter,
   cloudTask: cloudTaskRouter,
+  dashboards: dashboardsRouter,
   deepLink: deepLinkStubRouter,
   folders: foldersStubRouter,
   fs: fsStubRouter,