Display empty repositories table instead of nothing on query error

This was only possible when there was an error upon first navigating to
the repositories page. Otherwise, we'd display previous results.

.changeset/lemon-singers-smoke.md

@@ -0,0 +1,5 @@
+---
+"neogrok": patch
+---
+
+Display empty repositories table instead of nothing when there's a query error

src/routes/repositories/+page.svelte

@@ -24,17 +24,14 @@
   >
 </svelte:head>
 
-<!--
-  We hoist this above the conditions so that it never gets destroyed/remounted
-  as we transition among the states they represent.  This is important for
-  proper maintenance of the intricate synchronization between the route state
-  and the form state.
--->
 <SearchForm
   queryError={data.listOutcome.kind === "error" ? data.listOutcome.error : null}
 />
-{#if data.listOutcome.kind === "error" && previousListResults}
-  <RepositoriesList results={previousListResults} />
-{:else if data.listOutcome.kind === "success"}
-  <RepositoriesList results={data.listOutcome.results} />
-{/if}
+<RepositoriesList
+  results={data.listOutcome.kind === "success"
+    ? data.listOutcome.results
+    : previousListResults ?? {
+        repositories: [],
+        stats: { fileCount: 0, contentBytes: 0, indexBytes: 0 },
+      }}
+/>

src/routes/repositories/repositories-list.svelte

@@ -11,7 +11,6 @@
   } = results);
 </script>
 
-<!-- TODO accept null results, render empty table -->
 <!-- FIXME perf is bad on an instance with thousands of repos. -->
 <!-- FIXME the file count/ram size data is for repo shards matching the query,
 but that's not understandable from the UI -->