stop Svelte warnings from failing the build

+ check for them at test time

ts/graphs/GraphsPage.svelte

@@ -8,7 +8,6 @@
 
     import WithGraphData from "./WithGraphData.svelte";
 
-    import * as tr from "anki/i18n";
     export let nightMode: boolean;
     export let graphs: SvelteComponent[];
 

ts/graphs/HistogramGraph.svelte

@@ -9,7 +9,6 @@
     import { defaultGraphBounds } from "./graph-helpers";
 
     export let data: HistogramData | null = null;
-    import * as tr from "anki/i18n";
 
     let bounds = defaultGraphBounds();
     let svg = null as HTMLElement | SVGElement | null;

ts/svelte/svelte.bzl

@@ -64,6 +64,8 @@ def svelte_check(name = "svelte_check", srcs = []):
         args = [
             "--workspace",
             native.package_name(),
+            "--fail-on-warnings",
+            "--fail-on-hints",
         ],
         data = [
             "//ts:tsconfig.json",

ts/svelte/svelte.ts

@@ -158,7 +158,6 @@ async function writeJs(
         // warnings are an error
         if (result.warnings.length > 0) {
             console.log(`warnings during compile: ${result.warnings}`);
-            return;
         }
         // write out the css file
         const outputCss = result.css.code ?? "";