feat: add Stories UI — tab, list, new story elaborate/approve flow

- Stories tab (📖) with story card list, status badges, project/branch meta
- New Story modal: project picker + goal textarea + AI elaboration → plan review → approve & queue
- Story detail modal: status, project, branch, created date
- Export storyStatusLabel() and renderStoryCard() with 16 unit tests
- CSS for story cards, status badges, and modals

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

1 files changed, 135 insertions, 0 deletions

diff --git a/web/style.css b/web/style.css
index 96a6602..2bba8dc 100644
--- a/web/style.css
+++ b/web/style.css
@@ -1784,3 +1784,138 @@ dialog label select:focus {
   color: var(--text-muted);
   margin-top: 0.15rem;
 }
+
+/* ── Stories ───────────────────────────────────────────────────────────────── */
+
+[data-panel="stories"] {
+  padding: 1rem;
+}
+
+.stories-toolbar {
+  margin-bottom: 1rem;
+}
+
+.stories-list {
+  display: flex;
+  flex-direction: column;
+  gap: 0.75rem;
+}
+
+.story-card {
+  background: var(--surface);
+  border: 1px solid var(--border);
+  border-radius: 6px;
+  padding: 0.875rem 1rem;
+  cursor: pointer;
+  transition: border-color 0.15s, background 0.15s;
+}
+
+.story-card:hover {
+  border-color: var(--accent);
+  background: var(--surface-hover, var(--surface));
+}
+
+.story-card-header {
+  display: flex;
+  align-items: center;
+  gap: 0.625rem;
+  margin-bottom: 0.375rem;
+}
+
+.story-name {
+  font-weight: 600;
+  flex: 1;
+}
+
+.story-status-badge {
+  font-size: 0.72rem;
+  font-weight: 600;
+  padding: 0.15em 0.55em;
+  border-radius: 3px;
+  text-transform: uppercase;
+  letter-spacing: 0.04em;
+  background: var(--state-pending);
+  color: #0f172a;
+}
+
+.story-status-badge[data-status="PENDING"]      { background: var(--state-pending); }
+.story-status-badge[data-status="IN_PROGRESS"]  { background: var(--state-running); }
+.story-status-badge[data-status="SHIPPABLE"]    { background: var(--state-completed); }
+.story-status-badge[data-status="DEPLOYED"]     { background: #60a5fa; }
+.story-status-badge[data-status="VALIDATING"]   { background: #c084fc; }
+.story-status-badge[data-status="REVIEW_READY"] { background: var(--state-completed); }
+.story-status-badge[data-status="NEEDS_FIX"]    { background: var(--state-failed); color: #fff; }
+
+.story-meta {
+  display: flex;
+  gap: 1rem;
+  font-size: 0.8rem;
+  color: var(--text-muted);
+}
+
+.story-branch {
+  font-family: var(--font-mono, monospace);
+}
+
+/* Story modals */
+.story-modal-header {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  margin-bottom: 1rem;
+}
+
+.story-modal-header h2 {
+  margin: 0;
+}
+
+.story-modal-body {
+  display: flex;
+  flex-direction: column;
+  gap: 0.875rem;
+}
+
+#story-plan-area {
+  background: var(--code-bg, #1e293b);
+  border: 1px solid var(--border);
+  border-radius: 4px;
+  padding: 0.875rem;
+  font-size: 0.85rem;
+}
+
+.story-plan-name {
+  font-weight: 600;
+  margin: 0 0 0.25rem;
+}
+
+.story-plan-branch {
+  font-family: var(--font-mono, monospace);
+  font-size: 0.8rem;
+  color: var(--text-muted);
+  margin: 0 0 0.75rem;
+}
+
+.story-plan-section {
+  font-weight: 600;
+  margin: 0.75rem 0 0.25rem;
+}
+
+.story-plan-tasks {
+  margin: 0;
+  padding-left: 1.25rem;
+}
+
+.story-plan-tasks li {
+  margin-bottom: 0.25rem;
+}
+
+.story-plan-tasks ul {
+  font-size: 0.8rem;
+  color: var(--text-muted);
+  margin: 0.2rem 0 0;
+  padding-left: 1rem;
+}
+
+.story-detail-body {
+  padding: 0.25rem 0;
+}