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/lib/deep-link.ts

@@ -0,0 +1,40 @@
+import type { Router } from "@tanstack/react-router";
+
+const SCHEME = "openconcho:";
+
+function isTauri(): boolean {
+	return typeof window !== "undefined" && "__TAURI_INTERNALS__" in window;
+}
+
+function navigateFromUrl(router: Router<never, never>, raw: string): void {
+	let parsed: URL;
+	try {
+		parsed = new URL(raw);
+	} catch {
+		return;
+	}
+	if (parsed.protocol !== SCHEME) return;
+
+	const host = parsed.hostname || parsed.pathname.replace(/^\/+/, "").split("/")[0];
+	const search = parsed.search;
+
+	if (host === "explore") {
+		router.navigate({ to: `/explore${search}` as never });
+		return;
+	}
+
+	const path = parsed.pathname.startsWith("/") ? parsed.pathname : `/${parsed.pathname}`;
+	router.navigate({ to: `${path}${search}` as never });
+}
+
+export async function initDeepLinks(router: Router<never, never>): Promise<void> {
+	if (!isTauri()) return;
+	const { onOpenUrl, getCurrent } = await import("@tauri-apps/plugin-deep-link");
+
+	const initial = await getCurrent();
+	if (initial?.length) navigateFromUrl(router, initial[0]);
+
+	await onOpenUrl((urls) => {
+		if (urls[0]) navigateFromUrl(router, urls[0]);
+	});
+}