feat(analytics): add custom event tracking to Context, SkillTree, Planta, Questions

Add app-specific Umami event helpers and integrate tracking into:
- Context: 6 events (document create/delete/pin, space create/delete, AI generated)
- SkillTree: 3 events (skill create/delete with branch, XP added with level-up)
- Planta: 4 events (plant analyzed/created/deleted, plant watered)
- Questions: 5 events (question create/delete, research started, collection create/delete)

Updates ManaScore analytics from 3/5 to 4/5 for all four apps.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

packages/shared-utils/src/analytics.ts

@@ -275,6 +275,49 @@ export const ManaCoreEvents = {
 	profileUpdated: () => trackEvent('profile_updated'),
 };
 
+/**
+ * Context App Events
+ */
+export const ContextEvents = {
+	documentCreated: (type: string) => trackEvent('document_created', { type }),
+	documentDeleted: () => trackEvent('document_deleted'),
+	documentPinned: (pinned: boolean) => trackEvent('document_pinned', { pinned }),
+	spaceCreated: () => trackEvent('space_created'),
+	spaceDeleted: () => trackEvent('space_deleted'),
+	aiGenerated: () => trackEvent('ai_generated'),
+};
+
+/**
+ * SkillTree App Events
+ */
+export const SkillTreeEvents = {
+	skillCreated: (branch: string) => trackEvent('skill_created', { branch }),
+	skillDeleted: () => trackEvent('skill_deleted'),
+	xpAdded: (xp: number, leveledUp: boolean) =>
+		trackEvent('xp_added', { xp, leveled_up: leveledUp }),
+};
+
+/**
+ * Planta App Events
+ */
+export const PlantaEvents = {
+	plantAnalyzed: () => trackEvent('plant_analyzed'),
+	plantCreated: () => trackEvent('plant_created'),
+	plantDeleted: () => trackEvent('plant_deleted'),
+	plantWatered: () => trackEvent('plant_watered'),
+};
+
+/**
+ * Questions App Events
+ */
+export const QuestionsEvents = {
+	questionCreated: (depth: string) => trackEvent('question_created', { depth }),
+	questionDeleted: () => trackEvent('question_deleted'),
+	researchStarted: (depth: string) => trackEvent('research_started', { depth }),
+	collectionCreated: () => trackEvent('collection_created'),
+	collectionDeleted: () => trackEvent('collection_deleted'),
+};
+
 /**
  * Photos App Events
  */