feat(settings): added snap to grid slider to settings (#2504)

* feat(settings): added snap to grid slider to settings

* ack PR comments

* ack PR comment

packages/db/migrations/0129_stormy_nightmare.sql

@@ -0,0 +1 @@
+ALTER TABLE "settings" ADD COLUMN "snap_to_grid_size" integer DEFAULT 0 NOT NULL;

packages/db/migrations/meta/_journal.json

@@ -897,6 +897,13 @@
       "when": 1766266581373,
       "tag": "0128_swift_terrax",
       "breakpoints": true
+    },
+    {
+      "idx": 129,
+      "version": "7",
+      "when": 1766275541149,
+      "tag": "0129_stormy_nightmare",
+      "breakpoints": true
     }
   ]
 }

packages/db/schema.ts

@@ -448,6 +448,9 @@ export const settings = pgTable('settings', {
   // Notification preferences
   errorNotificationsEnabled: boolean('error_notifications_enabled').notNull().default(true),
 
+  // Canvas preferences
+  snapToGridSize: integer('snap_to_grid_size').notNull().default(0), // 0 = off, 10-50 = grid size
+
   // Copilot preferences - maps model_id to enabled/disabled boolean
   copilotEnabledModels: jsonb('copilot_enabled_models').notNull().default('{}'),