refactor(packages): consolidate 2 subscription packages into @manacore/subscriptions

Merged shared-subscription-types + shared-subscription-ui into
@manacore/subscriptions. Updated imports in 15 web apps.

Package count: 49 → 47

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

packages/subscriptions/src/usage.ts

@@ -0,0 +1,93 @@
+/**
+ * Usage and cost tracking types
+ */
+
+/**
+ * Usage data for displaying user's mana consumption
+ */
+export interface UsageData {
+	/** Total mana consumed all time */
+	total: number;
+	/** Mana consumed last week */
+	lastWeek: number;
+	/** Mana consumed last month */
+	lastMonth: number;
+	/** Current mana balance */
+	currentMana: number;
+	/** Maximum mana capacity */
+	maxMana: number;
+	/** Usage history */
+	history?: UsageHistoryEntry[];
+}
+
+/**
+ * Single usage history entry
+ */
+export interface UsageHistoryEntry {
+	/** Date of usage (ISO string) */
+	date: string;
+	/** Amount consumed */
+	amount: number;
+	/** Action type (optional) */
+	action?: string;
+}
+
+/**
+ * Cost item for displaying operation costs
+ */
+export interface CostItem {
+	/** Action description */
+	action: string;
+	/** Translation key for action */
+	actionKey?: string;
+	/** Mana cost */
+	cost: number;
+	/** Icon name */
+	icon: string;
+}
+
+/**
+ * User's credit/mana balance
+ */
+export interface ManaBalance {
+	/** Current mana amount */
+	current: number;
+	/** Maximum capacity */
+	max: number;
+	/** Last updated timestamp */
+	lastUpdated: string;
+}
+
+/**
+ * Credit transaction record
+ */
+export interface CreditTransaction {
+	/** Transaction ID */
+	id: string;
+	/** User ID */
+	userId: string;
+	/** Amount (positive = credit, negative = debit) */
+	amount: number;
+	/** Transaction type */
+	type: 'purchase' | 'subscription' | 'usage' | 'gift' | 'refund' | 'bonus';
+	/** Description */
+	description: string;
+	/** Timestamp */
+	createdAt: string;
+	/** Related operation ID (if applicable) */
+	operationId?: string;
+}
+
+/**
+ * Pricing information for operations
+ */
+export interface OperationPricing {
+	/** Operation key */
+	operation: string;
+	/** Base cost in mana */
+	baseCost: number;
+	/** Per-unit cost (e.g., per minute, per token) */
+	perUnitCost?: number;
+	/** Unit type */
+	unitType?: 'minute' | 'token' | 'request';
+}