Add paginated test history listing with disable option

Add GET /tests endpoint returning lightweight test summaries (grade,
score, domain, date) with pagination, using database-level JSON
extraction to avoid loading full report blobs. The feature can be
disabled with --disable-test-list flag. Frontend includes a new
/tests/ page with table view and a conditional "History" navbar link.

Fixes: https://github.com/happyDomain/happydeliver/issues/12

web/src/lib/components/HistoryTable.svelte

@@ -0,0 +1,72 @@
+<script lang="ts">
+    import { goto } from "$app/navigation";
+
+    import type { TestSummary } from "$lib/api/types.gen";
+    import GradeDisplay from "./GradeDisplay.svelte";
+
+    interface Props {
+        tests: TestSummary[];
+    }
+
+    let { tests }: Props = $props();
+
+    function formatDate(dateStr: string): string {
+        const date = new Date(dateStr);
+        return date.toLocaleDateString(undefined, {
+            year: "numeric",
+            month: "short",
+            day: "numeric",
+            hour: "2-digit",
+            minute: "2-digit",
+        });
+    }
+</script>
+
+<div class="table-responsive shadow-sm">
+    <table class="table table-hover mb-0 align-middle">
+        <thead>
+            <tr>
+                <th class="ps-4" style="width: 80px;">Grade</th>
+                <th style="width: 80px;">Score</th>
+                <th>Domain</th>
+                <th>Date</th>
+                <th style="width: 50px;"></th>
+            </tr>
+        </thead>
+        <tbody>
+            {#each tests as test}
+                <tr class="cursor-pointer" onclick={() => goto(`/test/${test.test_id}`)}>
+                    <td class="ps-4">
+                        <GradeDisplay grade={test.grade} size="small" />
+                    </td>
+                    <td>
+                        <span class="badge bg-secondary">{test.score}%</span>
+                    </td>
+                    <td>
+                        {#if test.from_domain}
+                            <code>{test.from_domain}</code>
+                        {:else}
+                            <span class="text-muted">-</span>
+                        {/if}
+                    </td>
+                    <td class="text-muted">
+                        {formatDate(test.created_at)}
+                    </td>
+                    <td>
+                        <i class="bi bi-chevron-right text-muted"></i>
+                    </td>
+                </tr>
+            {/each}
+        </tbody>
+    </table>
+</div>
+
+<style>
+    .cursor-pointer {
+        cursor: pointer;
+    }
+
+    .cursor-pointer:hover td {
+        background-color: var(--bs-tertiary-bg);
+    }
+</style>

web/src/lib/components/index.ts

@@ -23,5 +23,6 @@ export { default as RspamdCard } from "./RspamdCard.svelte";
 export { default as SpamAssassinCard } from "./SpamAssassinCard.svelte";
 export { default as SpfRecordsDisplay } from "./SpfRecordsDisplay.svelte";
 export { default as SummaryCard } from "./SummaryCard.svelte";
+export { default as HistoryTable } from "./HistoryTable.svelte";
 export { default as TinySurvey } from "./TinySurvey.svelte";
 export { default as WhitelistCard } from "./WhitelistCard.svelte";

web/src/lib/stores/config.ts

@@ -26,6 +26,7 @@ interface AppConfig {
     survey_url?: string;
     custom_logo_url?: string;
     rbls?: string[];
+    test_list_enabled?: boolean;
 }
 
 const defaultConfig: AppConfig = {