feat: deep linking for hosted URLs and openconcho:// scheme

Add /explore redirect route that maps Honcho's deep-link shape
(?workspace=...&view=...&session=...) onto our existing flat routes,
so any app.honcho.dev URL works against a self-hosted instance by
swapping the host.

Wire tauri-plugin-deep-link to register the openconcho:// scheme on
desktop and forward incoming URLs into the router on launch and at
runtime.

packages/web/src/routes/explore.tsx

@@ -0,0 +1,73 @@
+import { createFileRoute, redirect } from "@tanstack/react-router";
+
+type ExploreSearch = {
+	workspace?: string;
+	view?: "sessions" | "peers" | "conclusions" | "webhooks";
+	session?: string;
+	peer?: string;
+};
+
+export const Route = createFileRoute("/explore")({
+	validateSearch: (search: Record<string, unknown>): ExploreSearch => ({
+		workspace: typeof search.workspace === "string" ? search.workspace : undefined,
+		view:
+			search.view === "sessions" ||
+			search.view === "peers" ||
+			search.view === "conclusions" ||
+			search.view === "webhooks"
+				? search.view
+				: undefined,
+		session: typeof search.session === "string" ? search.session : undefined,
+		peer: typeof search.peer === "string" ? search.peer : undefined,
+	}),
+	loaderDeps: ({ search }) => search,
+	loader: ({ deps }) => {
+		const { workspace, view, session, peer } = deps;
+
+		if (!workspace) {
+			throw redirect({ to: "/workspaces" as never });
+		}
+
+		if (view === "sessions" && session) {
+			throw redirect({
+				to: "/workspaces/$workspaceId/sessions/$sessionId" as never,
+				params: { workspaceId: workspace, sessionId: session } as never,
+			});
+		}
+		if (view === "sessions") {
+			throw redirect({
+				to: "/workspaces/$workspaceId/sessions" as never,
+				params: { workspaceId: workspace } as never,
+			});
+		}
+		if (view === "peers" && peer) {
+			throw redirect({
+				to: "/workspaces/$workspaceId/peers/$peerId" as never,
+				params: { workspaceId: workspace, peerId: peer } as never,
+			});
+		}
+		if (view === "peers") {
+			throw redirect({
+				to: "/workspaces/$workspaceId/peers" as never,
+				params: { workspaceId: workspace } as never,
+			});
+		}
+		if (view === "conclusions") {
+			throw redirect({
+				to: "/workspaces/$workspaceId/conclusions" as never,
+				params: { workspaceId: workspace } as never,
+			});
+		}
+		if (view === "webhooks") {
+			throw redirect({
+				to: "/workspaces/$workspaceId/webhooks" as never,
+				params: { workspaceId: workspace } as never,
+			});
+		}
+
+		throw redirect({
+			to: "/workspaces/$workspaceId" as never,
+			params: { workspaceId: workspace } as never,
+		});
+	},
+});