improvement(pricing): increase free user limit to 20 usd (#2536)

* improvement(pricing): increase free user limit to 20 usd

* make gemini pricing accurate

* generate migration for db constant

* update docs

* test notif data

packages/db/constants.ts

@@ -6,7 +6,7 @@
 /**
  * Default free credits (in dollars) for new users
  */
-export const DEFAULT_FREE_CREDITS = 10
+export const DEFAULT_FREE_CREDITS = 20
 
 /**
  * Storage limit constants (in GB)

packages/db/migrations/0131_illegal_nova.sql

@@ -0,0 +1 @@
+ALTER TABLE "user_stats" ALTER COLUMN "current_usage_limit" SET DEFAULT '20';

packages/db/migrations/meta/_journal.json

@@ -911,6 +911,13 @@
       "when": 1766433914366,
       "tag": "0130_bored_master_chief",
       "breakpoints": true
+    },
+    {
+      "idx": 131,
+      "version": "7",
+      "when": 1766460889694,
+      "tag": "0131_illegal_nova",
+      "breakpoints": true
     }
   ]
 }

packages/db/schema.ts

@@ -653,7 +653,7 @@ export const userStats = pgTable('user_stats', {
   totalChatExecutions: integer('total_chat_executions').notNull().default(0),
   totalTokensUsed: integer('total_tokens_used').notNull().default(0),
   totalCost: decimal('total_cost').notNull().default('0'),
-  currentUsageLimit: decimal('current_usage_limit').default(DEFAULT_FREE_CREDITS.toString()), // Default $10 for free plan, null for team/enterprise
+  currentUsageLimit: decimal('current_usage_limit').default(DEFAULT_FREE_CREDITS.toString()), // Default $20 for free plan, null for team/enterprise
   usageLimitUpdatedAt: timestamp('usage_limit_updated_at').defaultNow(),
   // Billing period tracking
   currentPeriodCost: decimal('current_period_cost').notNull().default('0'), // Usage in current billing period