1 files changed, 150 insertions, 0 deletions
diff --git a/src/app/ErrorModal.svelte b/src/app/ErrorModal.svelte
new file mode 100644
index 0000000..0415827
--- /dev/null
+++ b/src/app/ErrorModal.svelte
@@ -0,0 +1,150 @@
+<script lang="ts">
+  /**
+   * Full-screen error modal — surfaces critical errors that would otherwise be
+   * silently swallowed (e.g. the cross-device tab-restore fetch failing). Shows
+   * the full error text + stack trace in a scrollable `<pre>`, a Copy button
+   * (clipboard), and an X to dismiss. Pure presentation: the error string and
+   * dismiss callback are injected as props.
+   */
+  let {
+    error,
+    onDismiss,
+  }: {
+    error: string;
+    onDismiss: () => void;
+  } = $props();
+
+  let copied = $state(false);
+  let copyTimer: ReturnType<typeof setTimeout> | undefined;
+
+  async function handleCopy(): Promise<void> {
+    try {
+      await navigator.clipboard.writeText(error);
+      copied = true;
+      clearTimeout(copyTimer);
+      copyTimer = setTimeout(() => {
+        copied = false;
+      }, 2000);
+    } catch {
+      // Clipboard API may be unavailable (non-secure context). Fallback:
+      // select the text so the user can Ctrl+C manually.
+      const pre = document.getElementById("error-modal-text");
+      if (pre !== null) {
+        const range = document.createRange();
+        range.selectNodeContents(pre);
+        const selection = window.getSelection();
+        selection?.removeAllRanges();
+        selection?.addRange(range);
+      }
+    }
+  }
+
+  function handleKeydown(event: KeyboardEvent): void {
+    if (event.key === "Escape") {
+      event.preventDefault();
+      onDismiss();
+    }
+  }
+</script>
+
+<svelte:window onkeydown={handleKeydown} />
+
+<!-- Full-screen overlay: fixed, high z-index, semi-transparent backdrop. -->
+<!-- svelte-ignore a11y_no_static_element_interactions -->
+<div
+  class="fixed inset-0 z-50 flex items-center justify-center bg-black/60 p-4"
+  role="dialog"
+  aria-modal="true"
+  aria-label="Error"
+>
+  <div class="flex max-h-[80vh] w-full max-w-2xl flex-col rounded-lg bg-base-100 shadow-xl">
+    <!-- Header -->
+    <div class="flex items-center justify-between border-b border-base-300 px-4 py-3">
+      <div class="flex items-center gap-2">
+        <svg
+          xmlns="http://www.w3.org/2000/svg"
+          fill="none"
+          viewBox="0 0 24 24"
+          stroke-width="2"
+          stroke="currentColor"
+          class="size-5 text-error"
+          aria-hidden="true"
+        >
+          <path
+            stroke-linecap="round"
+            stroke-linejoin="round"
+            d="M12 9v3.75m-9.303 3.376c-.866 1.5.217 3.374 1.948 3.374h14.71c1.73 0 2.813-1.874 1.948-3.374L13.949 3.378c-.866-1.5-3.032-1.5-3.898 0L2.697 16.126ZM12 15.75h.007v.008H12v-.008Z"
+          />
+        </svg>
+        <h2 class="text-lg font-semibold text-error">Something went wrong</h2>
+      </div>
+      <button
+        type="button"
+        class="btn btn-ghost btn-sm btn-square"
+        aria-label="Dismiss error"
+        onclick={onDismiss}
+      >
+        <svg
+          xmlns="http://www.w3.org/2000/svg"
+          fill="none"
+          viewBox="0 0 24 24"
+          stroke-width="2"
+          stroke="currentColor"
+          class="size-5"
+          aria-hidden="true"
+        >
+          <path stroke-linecap="round" stroke-linejoin="round" d="M6 18 18 6M6 6l12 12" />
+        </svg>
+      </button>
+    </div>
+
+    <!-- Body: scrollable error text -->
+    <div class="overflow-auto p-4">
+      <pre
+        id="error-modal-text"
+        class="whitespace-pre-wrap break-words font-mono text-xs leading-relaxed opacity-80">{error}</pre>
+    </div>
+
+    <!-- Footer: copy button -->
+    <div class="flex items-center justify-between gap-2 border-t border-base-300 px-4 py-3">
+      <span class="text-xs opacity-50">Press Esc to dismiss</span>
+      <button
+        type="button"
+        class="btn btn-sm {copied ? 'btn-success' : 'btn-outline'}"
+        onclick={handleCopy}
+      >
+        {#if copied}
+          <svg
+            xmlns="http://www.w3.org/2000/svg"
+            fill="none"
+            viewBox="0 0 24 24"
+            stroke-width="2"
+            stroke="currentColor"
+            class="size-4"
+            aria-hidden="true"
+          >
+            <path stroke-linecap="round" stroke-linejoin="round" d="m4.5 12.75 6 6 9-13.5" />
+          </svg>
+          Copied
+        {:else}
+          <svg
+            xmlns="http://www.w3.org/2000/svg"
+            fill="none"
+            viewBox="0 0 24 24"
+            stroke-width="2"
+            stroke="currentColor"
+            class="size-4"
+            aria-hidden="true"
+          >
+            <path
+              stroke-linecap="round"
+              stroke-linejoin="round"
+              d="M15.75 17.25v3.375c0 .621-.504 1.125-1.125 1.125h-9.75a1.125 1.125 0 0 1-1.125-1.125V7.875c0-.621.504-1.125 1.125-1.125H6.75a9.06 9.06 0 0 1 1.5.124m7.5 10.376h3.375c.621 0 1.125-.504 1.125-1.125V11.25c0-4.46-3.243-8.161-7.5-8.876a9.06 9.06 0 0 0-1.5-.124H9.375c-.621 0-1.125.504-1.125 1.125v3.5m7.5 10.375H9.375a1.125 1.125 0 0 1-1.125-1.125v-9.25m18 3.75h-3.75m3.75 0-2.25 2.25m2.25-2.25 2.25 2.25M4.5 6.75 6.75 4.5"
+            />
+          </svg>
+          Copy
+        {/if}
+      </button>
+    </div>
+  </div>
+</div>