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/components/settings/SettingsPage.tsx

@@ -131,13 +131,61 @@ export function SettingsPage(): React.JSX.Element {
                 }
               />
             </div>
+            <div className="setting-item">
+              <span>{t('settings.dailyWordGoal')}</span>
+              <input
+                type="number"
+                min={0}
+                data-testid="settings-daily-word-goal"
+                className="form-control form-control--narrow"
+                value={settings.dailyWordGoal}
+                onChange={(e) =>
+                  void settings.update({
+                    dailyWordGoal: Math.max(0, Number(e.target.value) || 0)
+                  })
+                }
+              />
+            </div>
+            <div className="setting-item">
+              <label style={{ display: 'flex', alignItems: 'center', gap: 8 }}>
+                <input
+                  type="checkbox"
+                  data-testid="settings-knowledge-auto-extract"
+                  checked={settings.knowledgeAutoExtract !== false}
+                  onChange={(e) =>
+                    void settings.update({ knowledgeAutoExtract: e.target.checked })
+                  }
+                />
+                {t('settings.knowledgeAutoExtract')}
+              </label>
+            </div>
+            <div className="setting-item">
+              <span>{t('settings.extractThreshold')}</span>
+              <input
+                type="number"
+                min={0}
+                max={1}
+                step={0.05}
+                data-testid="settings-extract-threshold"
+                className="form-control form-control--narrow"
+                value={settings.knowledgeExtractConfidenceThreshold ?? 0.8}
+                onChange={(e) =>
+                  void settings.update({
+                    knowledgeExtractConfidenceThreshold: Math.min(
+                      1,
+                      Math.max(0, Number(e.target.value) || 0.8)
+                    )
+                  })
+                }
+              />
+            </div>
           </>
         )}
         {section === 'ai' && <AiSettingsPage />}
         {section === 'shortcuts' && <ShortcutEditor />}
         {section === 'about' && (
           <p style={{ color: 'var(--text-secondary)', lineHeight: 1.8 }}>
-            {t('app.name')} v0.7.0
+            {t('app.name')} v0.8.0
             <br />
             {t('app.tagline')}
           </p>