list page pt. 6 remove hydration variables

src/routes/list/+page.svelte

@@ -1,7 +1,9 @@
 <script lang="ts">
 	import { useSearchParams } from "runed/kit";
+	import { onMount } from "svelte";
 	import { z } from "zod";
-	import { db, ensureSeeded, getSongsForMalAnimeIds } from "$lib/db/client-db";
+	import { invalidate } from "$app/navigation";
+	import { db as clientDb } from "$lib/db/client-db";
 	import {
 		MalAnimeListQuerySchema,
 		MalAnimeListStatusEnum,
@@ -27,38 +29,40 @@
 	// Local username field that does NOT update the URL as you type.
 	let formMal = $state<string>("");
 
-	// Songs displayed in the UI: start with server-provided `songRows`,
-	// then hydrate client-side if needed.
-	let hydratedSongRows = $state<PageData["songRows"]>([]);
-
 	// Keep form input synced with navigation (back/forward) and initial load.
 	$effect(() => {
 		formMal = data.username || params.mal || "";
 	});
 
-	// Keep displayed songs synced to the latest `data` (avoid stale capture).
-	$effect(() => {
-		hydratedSongRows = data.songRows;
-	});
+	// If SSR returned no songRows (because client DB wasn't available),
+	// re-run load on the client once the DB is ready by invalidating.
+	onMount(() => {
+		if (data.songRows.length > 0) return;
+		if (!data.username || !data.malResponse) return;
 
-	// If SSR returned no songRows (because client DB wasn't available), hydrate in browser.
-	$effect(() => {
-		void (async () => {
-			// If server already provided songs, we are done.
-			if (data.songRows.length > 0) return;
+		if (clientDb) {
+			void invalidate("clientdb:songs");
+			return;
+		}
 
-			// If we don't have an active username or MAL response, nothing to hydrate.
-			if (!data.username) return;
-			if (!data.malResponse) return;
+		let cancelled = false;
 
-			// If client DB isn't ready (SSR) we'll re-run once it exists (module init).
-			if (!db) return;
+		const waitForDbAndInvalidate = async () => {
+			for (let i = 0; i < 50; i++) {
+				if (cancelled) return;
+				if (clientDb) {
+					await invalidate("clientdb:songs");
+					return;
+				}
+				await new Promise((r) => setTimeout(r, 50));
+			}
+		};
 
-			await ensureSeeded();
+		void waitForDbAndInvalidate();
 
-			const malIds = data.malResponse.data.map((e) => e.node.id);
-			hydratedSongRows = await getSongsForMalAnimeIds(db, malIds);
-		})();
+		return () => {
+			cancelled = true;
+		};
 	});
 
 	function onSearch() {
@@ -66,7 +70,7 @@
 		params.mal = formMal;
 	}
 
-	function songArtistLabel(r: (typeof hydratedSongRows)[number]) {
+	function songArtistLabel(r: (typeof data.songRows)[number]) {
 		return r.artistName ?? r.groupName ?? null;
 	}
 
@@ -141,7 +145,7 @@
 			Waiting for username…
 		{:else}
 			MAL entries: {data.malResponse?.data.length ?? 0} (limited to {LIST_QUERY_LIMIT})
-			• Songs found: {hydratedSongRows.length}
+			• Songs found: {data.songRows.length}
 		{/if}
 	</div>
 
@@ -165,18 +169,18 @@
 	</p>
 {/if}
 
-{#if (formMal ?? "").trim() && data.username && (data.malResponse?.data.length ?? 0) > 0 && hydratedSongRows.length === 0}
+{#if (formMal ?? "").trim() && data.username && (data.malResponse?.data.length ?? 0) > 0 && data.songRows.length === 0}
 	<p class="mt-4 text-sm text-muted-foreground">
 		No songs matched in the local database. This likely means none of the MAL
 		anime IDs exist in the AMQ DB.
 	</p>
 {/if}
 
-{#if hydratedSongRows.length > 0}
+{#if data.songRows.length > 0}
 	<h2 class="mt-6 text-lg font-semibold">Songs</h2>
 
 	<ul class="mt-3 space-y-2">
-		{#each hydratedSongRows as r (String(r.annId) + ":" + String(r.annSongId))}
+		{#each data.songRows as r (String(r.annId) + ":" + String(r.annSongId))}
 			<li class="rounded border px-3 py-2">
 				<div class="font-medium">
 					{r.songName}