feat(server,frontend): expose children endpoint + expand UI for container entries

server:
- add GET /api/archives/:id/entries/:uid/children → list_entry_children,
  calling list_child_entries with caller_bits so visibility model is enforced
- fix capture_handler: use result.status ("completed"/"failed") to set job
  status rather than always "completed", mirroring rearchive_handler; this
  surfaces partial playlist failures to the polling client

frontend:
- api.js: add fetchEntryChildren(archiveId, entryUid)
- EntryRow: one outer div.entry-row-outer (display:block) keeps nth-child
  striping correct; inner div.entry-row-main is the flex row with all column
  cells and event handling; .child-entries sits below inside the outer wrapper
- expand chevron appears when entry.child_count > 0; clicking fetches children
  lazily and renders ChildRow components reusing .col-* flex widths
- child-count badge shown next to title on container entries
- styles.css: scoped CSS with #entries-body > .entry-row-outer selectors
  (higher specificity than > div) to override flex on outer wrapper; inner row
  and column rules replicated at correct depth; nth-child, is-selected,
  is-multi-selected, url-cell hover all handled

crates/archivr-server/src/routes.rs

@@ -241,6 +241,10 @@ pub fn app_with_state(state: AppState) -> Router {
                 .patch(patch_entry_handler)
                 .delete(delete_entry_handler),
         )
+        .route(
+            "/api/archives/:archive_id/entries/:entry_uid/children",
+            get(list_entry_children),
+        )
         .route(
             "/api/archives/:archive_id/entries/:entry_uid/artifacts/:artifact_index",
             get(serve_artifact),
@@ -404,6 +408,18 @@ async fn list_entries(
     Ok(Json(archive::list_root_entries(&conn, caller_bits)?))
 }
 
+async fn list_entry_children(
+    State(state): State<AppState>,
+    auth: AuthUser,
+    Path((archive_id, entry_uid)): Path<(String, String)>,
+) -> Result<Json<Vec<archive::EntrySummary>>, ApiError> {
+    auth.require_auth()?;
+    let mounted = mounted_archive(&state, &archive_id)?;
+    let conn = database::open_or_initialize(&mounted.archive_path)?;
+    let caller_bits = auth_to_caller_bits(&auth);
+    Ok(Json(archive::list_child_entries(&conn, &entry_uid, caller_bits)?))
+}
+
 async fn search_entries_handler(
     State(state): State<AppState>,
     auth: AuthUser,
@@ -902,10 +918,11 @@ async fn capture_handler(
                     notes_str = serde_json::Value::Object(notes_map).to_string();
                     Some(&notes_str)
                 };
+                let job_status = if result.status == "completed" { "completed" } else { "failed" };
                 database::update_capture_job_status(
                     &conn,
                     &job_uid_bg,
-                    "completed",
+                    job_status,
                     Some(&result.run_uid),
                     None,
                     notes,

frontend/src/api.js

@@ -25,6 +25,10 @@ export async function fetchEntryDetail(archiveId, entryUid) {
   return getJson(`/api/archives/${archiveId}/entries/${entryUid}`);
 }
 
+export async function fetchEntryChildren(archiveId, entryUid) {
+  return getJson(`/api/archives/${archiveId}/entries/${entryUid}/children`);
+}
+
 // Fetch multiple artifact JSON payloads for an entry in parallel.
 // Returns a Promise<Array> preserving index order.
 export function fetchEntryArtifacts(archiveId, entryUid, indices) {

frontend/src/components/EntryRow.jsx

@@ -1,8 +1,35 @@
 import { useState } from 'react';
 import { formatTimestamp, formatBytes, valueText, sourceIconSvg } from '../utils';
+import { fetchEntryChildren } from '../api';
+
+function ChildRow({ entry }) {
+  return (
+    <div className="child-entry-row">
+      <div className="col-check" aria-hidden="true" />
+      <div className="col-added">{formatTimestamp(entry.archived_at)}</div>
+      <div className="col-title">
+        <span className="source-icon">
+          <span dangerouslySetInnerHTML={{ __html: sourceIconSvg(entry.source_kind) }} />
+        </span>
+        <span className="entry-title">{valueText(entry.title) || valueText(entry.entry_uid)}</span>
+      </div>
+      <div className="col-type">
+        <span className="type-pill">{valueText(entry.entity_kind)}</span>
+      </div>
+      <div className="col-size">
+        <span className="size-total">{formatBytes(entry.total_artifact_bytes)}</span>
+      </div>
+      <div className="url-cell col-url">{valueText(entry.original_url)}</div>
+    </div>
+  );
+}
 
 export default function EntryRow({ entry, archiveId, isSelected, isMultiSelected, onRowClick }) {
   const [favFailed, setFavFailed] = useState(false);
+  const [expanded, setExpanded] = useState(false);
+  const [children, setChildren] = useState(null);
+  const [childrenLoading, setChildrenLoading] = useState(false);
+
   const showFavicon =
     entry.source_kind === 'web' &&
     entry.entity_kind === 'page' &&
@@ -24,49 +51,101 @@ export default function EntryRow({ entry, archiveId, isSelected, isMultiSelected
   );
 
   const checked = isSelected || isMultiSelected;
+  const hasChildren = entry.child_count > 0;
 
   function handleCheckboxClick(e) {
     e.stopPropagation();
-    // treat checkbox tap as ctrl+click: toggle this entry without clearing others
     onRowClick(entry, { ctrlKey: true, metaKey: false, shiftKey: false, preventDefault() {} });
   }
 
+  async function handleExpandClick(e) {
+    e.stopPropagation();
+    if (expanded) {
+      setExpanded(false);
+      return;
+    }
+    setExpanded(true);
+    if (children === null && !childrenLoading) {
+      setChildrenLoading(true);
+      try {
+        const result = await fetchEntryChildren(archiveId, entry.entry_uid);
+        setChildren(result);
+      } catch (_) {
+        setChildren([]);
+      } finally {
+        setChildrenLoading(false);
+      }
+    }
+  }
+
+  // Outer wrapper: display:block so child-entries lives below the flex row.
+  // One wrapper per entry → nth-child striping stays correct.
+  // is-selected/is-multi-selected go here so #entries-body > div.is-selected still matches.
+  const outerClass = [
+    'entry-row-outer',
+    isSelected && 'is-selected',
+    isMultiSelected && 'is-multi-selected',
+  ].filter(Boolean).join(' ');
+
   return (
-    <div
-      className={[isSelected && 'is-selected', isMultiSelected && 'is-multi-selected'].filter(Boolean).join(' ') || undefined}
-      tabIndex={0}
-      data-entry-uid={entry.entry_uid}
-      onMouseDown={e => { if (e.shiftKey) e.preventDefault() }}
-      onClick={e => onRowClick(entry, e)}
-      onKeyDown={e => { if (e.key === 'Enter') onRowClick(entry, e) }}
-    >
-      <div className="col-check">
-        <button
-          type="button"
-          className={`row-checkbox${checked ? ' is-checked' : ''}`}
-          aria-pressed={checked}
-          aria-label={checked ? 'Deselect entry' : 'Select entry'}
-          onClick={handleCheckboxClick}
-          onKeyDown={e => e.stopPropagation()}
-        />
+    <div className={outerClass} data-entry-uid={entry.entry_uid}>
+      {/* entry-row-main is the interactive flex row */}
+      <div
+        className="entry-row-main"
+        tabIndex={0}
+        onMouseDown={e => { if (e.shiftKey) e.preventDefault(); }}
+        onClick={e => onRowClick(entry, e)}
+        onKeyDown={e => { if (e.key === 'Enter') onRowClick(entry, e); }}
+      >
+        <div className="col-check">
+          <button
+            type="button"
+            className={`row-checkbox${checked ? ' is-checked' : ''}`}
+            aria-pressed={checked}
+            aria-label={checked ? 'Deselect entry' : 'Select entry'}
+            onClick={handleCheckboxClick}
+            onKeyDown={e => e.stopPropagation()}
+          />
+        </div>
+        <div className="col-added">{formatTimestamp(entry.archived_at)}</div>
+        <div className="col-title">
+          {hasChildren && (
+            <button
+              type="button"
+              className={`entry-expand-btn${expanded ? ' is-expanded' : ''}`}
+              aria-label={expanded ? 'Collapse children' : `Expand ${entry.child_count} items`}
+              aria-expanded={expanded}
+              onClick={handleExpandClick}
+              onKeyDown={e => e.stopPropagation()}
+            />
+          )}
+          <span className="source-icon">{icon}</span>
+          <span className="entry-title">{valueText(entry.title) || valueText(entry.entry_uid)}</span>
+          {hasChildren && (
+            <span className="child-count-badge" aria-hidden="true">{entry.child_count}</span>
+          )}
+        </div>
+        <div className="col-type">
+          <span className="type-pill">{valueText(entry.entity_kind)}</span>
+        </div>
+        <div className="col-size">
+          <span className="size-total">{formatBytes(entry.total_artifact_bytes)}</span>
+          {entry.cached_bytes > 0 && entry.total_artifact_bytes > 0 && (
+            <span className="size-cached-pct" title={`${formatBytes(entry.cached_bytes)} already on disk from an earlier entry`}>
+              {Math.round(entry.cached_bytes / entry.total_artifact_bytes * 100)}% cached
+            </span>
+          )}
+        </div>
+        <div className="url-cell col-url">{valueText(entry.original_url)}</div>
       </div>
-      <div className="col-added">{formatTimestamp(entry.archived_at)}</div>
-      <div className="col-title">
-        <span className="source-icon">{icon}</span>
-        <span className="entry-title">{valueText(entry.title) || valueText(entry.entry_uid)}</span>
-      </div>
-      <div className="col-type">
-        <span className="type-pill">{valueText(entry.entity_kind)}</span>
-      </div>
-      <div className="col-size">
-        <span className="size-total">{formatBytes(entry.total_artifact_bytes)}</span>
-        {entry.cached_bytes > 0 && entry.total_artifact_bytes > 0 && (
-          <span className="size-cached-pct" title={`${formatBytes(entry.cached_bytes)} already on disk from an earlier entry`}>
-            {Math.round(entry.cached_bytes / entry.total_artifact_bytes * 100)}% cached
-          </span>
-        )}
-      </div>
-      <div className="url-cell col-url">{valueText(entry.original_url)}</div>
+      {expanded && (
+        <div className="child-entries" aria-label={`${entry.child_count} child entries`}>
+          {childrenLoading && <div className="child-entries-loading">Loading…</div>}
+          {children && children.map(child => (
+            <ChildRow key={child.entry_uid} entry={child} />
+          ))}
+        </div>
+      )}
     </div>
   );
 }

frontend/src/styles.css

@@ -2726,3 +2726,132 @@ body.has-audio-bar { padding-bottom: 56px; }
 @media (pointer: coarse) {
   .skeleton-row .col-added { padding-left: 10px; }
 }
+
+/* ── Child entry expansion ───────────────────────────────────────────────── */
+
+/* Outer wrapper: one block per entry-group so nth-child stays correct.
+   #entries-body > .entry-row-outer beats #entries-body > div on specificity
+   (id + class > id + element) so display:flex is safely overridden. */
+#entries-body > .entry-row-outer {
+  display: block;
+  border-bottom: none;
+}
+
+/* Inner flex row: replicates the #entries-body > div row behaviour. */
+#entries-body > .entry-row-outer > .entry-row-main {
+  display: flex;
+  align-items: center;
+  cursor: default;
+  border-bottom: 1px solid var(--line-soft);
+  /* Reset padding that #entries-body > div > div would otherwise apply. */
+  padding: 0;
+  flex-shrink: unset;
+  overflow: visible;
+}
+
+/* Column cells inside the inner row. */
+#entries-body > .entry-row-outer > .entry-row-main > div {
+  padding: 7px 10px;
+  flex-shrink: 0;
+  overflow: hidden;
+}
+#entries-body > .entry-row-outer > .entry-row-main > div:last-child { padding-right: 22px; }
+#entries-body > .entry-row-outer > .entry-row-main .col-added { padding-left: 22px; }
+
+/* Striping: one outer wrapper per entry, so nth-child alternation is preserved. */
+#entries-body > .entry-row-outer:nth-child(even) { background: #f2ede5; }
+#entries-body > .entry-row-outer:nth-child(odd)  { background: var(--paper-3); }
+
+/* Selection: class lives on outer wrapper, outline scoped to inner row. */
+#entries-body > .entry-row-outer.is-selected     { background: #eee2d2; outline: none; }
+#entries-body > .entry-row-outer.is-multi-selected { background: #eee2d2; outline: none; }
+#entries-body > .entry-row-outer.is-selected .entry-row-main {
+  outline: 2px solid var(--accent);
+  outline-offset: -2px;
+}
+#entries-body > .entry-row-outer.is-multi-selected .entry-row-main {
+  outline: 2px solid var(--accent);
+  outline-offset: -2px;
+}
+
+/* URL overflow on hover / selection — same semantics as original. */
+#entries-body > .entry-row-outer .url-cell:hover,
+#entries-body > .entry-row-outer.is-selected .url-cell { overflow: visible; white-space: normal; }
+
+/* child-entries container: reset the padding that #entries-body > div > div applies. */
+#entries-body > .entry-row-outer > .child-entries {
+  display: block;
+  padding: 0;
+  flex-shrink: unset;
+  overflow: visible;
+  border-left: 2px solid var(--line-soft);
+  margin-left: 32px;
+}
+
+/* Each child row reuses the same .col-* flex widths as normal rows. */
+.child-entry-row {
+  display: flex;
+  align-items: center;
+  cursor: default;
+  border-bottom: 1px solid var(--line-soft);
+  opacity: 0.88;
+}
+.child-entry-row:last-child { border-bottom: none; }
+.child-entry-row > div {
+  padding: 6px 10px;
+  flex-shrink: 0;
+  overflow: hidden;
+}
+.child-entry-row .col-added { padding-left: 22px; }
+.child-entry-row > div:last-child { padding-right: 22px; }
+
+/* Expand chevron button */
+.entry-expand-btn {
+  display: inline-flex;
+  align-items: center;
+  justify-content: center;
+  width: 16px;
+  height: 16px;
+  flex-shrink: 0;
+  padding: 0;
+  margin-right: 2px;
+  background: none;
+  border: none;
+  cursor: pointer;
+  opacity: 0.45;
+  color: inherit;
+  transition: opacity 0.15s;
+}
+.entry-expand-btn::before {
+  content: '';
+  display: block;
+  width: 0;
+  height: 0;
+  border-top: 4px solid transparent;
+  border-bottom: 4px solid transparent;
+  border-left: 6px solid currentColor;
+  transition: transform 0.15s;
+}
+.entry-expand-btn:hover { opacity: 1; }
+.entry-expand-btn.is-expanded::before { transform: rotate(90deg); }
+
+/* Child count badge next to title */
+.child-count-badge {
+  display: inline-block;
+  margin-left: 5px;
+  padding: 0 5px;
+  font-size: 0.72em;
+  font-weight: 600;
+  background: color-mix(in srgb, var(--line-soft) 60%, transparent);
+  border-radius: 10px;
+  opacity: 0.75;
+  vertical-align: middle;
+  line-height: 1.6;
+}
+
+/* Loading placeholder inside child-entries */
+.child-entries-loading {
+  padding: 8px 12px;
+  font-size: 0.85em;
+  opacity: 0.55;
+}