feat: ship v0.8.0 with writing logs and AI knowledge extraction

Deliver P5.2 writing day logs, cockpit heatmap, streak tracking, and chapter knowledge auto-extraction with merge review.

Co-authored-by: Cursor <cursoragent@cursor.com>

src/renderer/styles/layout.css

@@ -868,6 +868,62 @@
   gap: 8px;
 }
 
+.cockpit-writing-section {
+  margin-top: 16px;
+  display: flex;
+  flex-direction: column;
+  gap: 8px;
+}
+
+.cockpit-today-progress {
+  font-size: 15px;
+  font-weight: 600;
+}
+
+.cockpit-streak {
+  color: var(--accent-light);
+  font-size: 13px;
+}
+
+.cockpit-heatmap-label {
+  font-size: 12px;
+  color: var(--text-secondary);
+}
+
+.cockpit-heatmap-wrap {
+  overflow-x: auto;
+}
+
+.status-daily-goal {
+  margin-left: 12px;
+  font-size: 12px;
+  color: var(--text-secondary);
+}
+
+.status-daily-goal.goal-near {
+  color: var(--accent-light);
+}
+
+.status-daily-goal.goal-met {
+  color: #3fb950;
+  font-weight: 600;
+}
+
+.kb-confidence-badge {
+  margin-left: 8px;
+  font-size: 11px;
+  padding: 1px 6px;
+  border-radius: 4px;
+  background: var(--bg-tertiary);
+  color: var(--text-secondary);
+}
+
+.kb-merge-hint {
+  margin-top: 4px;
+  font-size: 12px;
+  color: var(--accent-light);
+}
+
 .bridge-body {
   max-height: 420px;
   overflow-y: auto;