feat(#37-41): Add domains, ideas, relationships, agents, widgets schema

Schema additions for issues #37-41:

New models:
- Domain (#37): Life domains (work, marriage, homelab, etc.)
- Idea (#38): Brain dumps with pgvector embeddings
- Relationship (#39): Generic entity linking (blocks, depends_on)
- Agent (#40): ClawdBot agent tracking with metrics
- AgentSession (#40): Conversation session tracking
- WidgetDefinition (#41): HUD widget registry
- UserLayout (#41): Per-user dashboard configuration

Updated models:
- Task, Event, Project: Added domainId foreign key
- User, Workspace: Added new relations

New enums:
- IdeaStatus: CAPTURED, PROCESSING, ACTIONABLE, ARCHIVED, DISCARDED
- RelationshipType: BLOCKS, BLOCKED_BY, DEPENDS_ON, etc.
- AgentStatus: IDLE, WORKING, WAITING, ERROR, TERMINATED
- EntityType: Added IDEA, DOMAIN

Migration: 20260129182803_add_domains_ideas_agents_widgets

apps/web/src/lib/utils/date-format.ts

@@ -0,0 +1,69 @@
+/**
+ * Date formatting utilities
+ * Provides PDA-friendly date formatting and grouping
+ */
+
+import { format, isToday, isTomorrow, differenceInDays, isBefore } from "date-fns";
+
+/**
+ * Format a date in a readable format
+ */
+export function formatDate(date: Date): string {
+  try {
+    return format(date, "MMM d, yyyy");
+  } catch (error) {
+    return "Invalid Date";
+  }
+}
+
+/**
+ * Format time in 12-hour format
+ */
+export function formatTime(date: Date): string {
+  try {
+    return format(date, "h:mm a");
+  } catch (error) {
+    return "Invalid Time";
+  }
+}
+
+/**
+ * Get a PDA-friendly label for date grouping
+ * Returns: "Today", "Tomorrow", "This Week", "Next Week", "Later"
+ */
+export function getDateGroupLabel(date: Date, referenceDate: Date = new Date()): string {
+  if (isToday(date)) {
+    return "Today";
+  }
+
+  if (isTomorrow(date)) {
+    return "Tomorrow";
+  }
+
+  const daysUntil = differenceInDays(date, referenceDate);
+
+  if (daysUntil >= 0 && daysUntil <= 7) {
+    return "This Week";
+  }
+
+  if (daysUntil > 7 && daysUntil <= 14) {
+    return "Next Week";
+  }
+
+  return "Later";
+}
+
+/**
+ * Check if a date has passed (PDA-friendly: "target passed" instead of "overdue")
+ */
+export function isPastTarget(targetDate: Date, now: Date = new Date()): boolean {
+  return isBefore(targetDate, now);
+}
+
+/**
+ * Check if a date is approaching (within 24 hours)
+ */
+export function isApproachingTarget(targetDate: Date, now: Date = new Date()): boolean {
+  const hoursUntil = differenceInDays(targetDate, now);
+  return hoursUntil >= 0 && hoursUntil <= 1;
+}