fix: use regular dependency for @tanstack/db in all packages

Move @tanstack/db from peerDependencies to dependencies in
query-db-collection and offline-transactions to match the standard
pattern used by other TanStack DB packages.

This fixes duplicate @tanstack/db installations when users have multiple
packages installed together.

Author: claude

.changeset/fix-tanstack-db-peerdeps.md

@@ -0,0 +1,6 @@
+---
+"@tanstack/query-db-collection": patch
+"@tanstack/offline-transactions": patch
+---
+
+Use regular dependency for @tanstack/db instead of peerDependency to match the standard pattern used by other TanStack DB packages and prevent duplicate installations

packages/offline-transactions/package.json

@@ -50,15 +50,13 @@
     "typecheck": "tsc --noEmit",
     "lint": "eslint src"
   },
-  "dependencies": {},
+  "dependencies": {
+    "@tanstack/db": "workspace:*"
+  },
   "devDependencies": {
     "@types/node": "^20.0.0",
-    "@tanstack/db": "workspace:*",
     "eslint": "^8.57.1",
     "typescript": "^5.5.4",
     "vitest": "^3.2.4"
-  },
-  "peerDependencies": {
-    "@tanstack/db": "*"
   }
 }

packages/query-db-collection/package.json

@@ -3,10 +3,10 @@
   "description": "TanStack Query collection for TanStack DB",
   "version": "1.0.5",
   "dependencies": {
-    "@standard-schema/spec": "^1.0.0"
+    "@standard-schema/spec": "^1.0.0",
+    "@tanstack/db": "workspace:*"
   },
   "devDependencies": {
-    "@tanstack/db": "workspace:*",
     "@tanstack/query-core": "^5.90.11",
     "@vitest/coverage-istanbul": "^3.2.4"
   },
@@ -31,7 +31,6 @@
   "module": "dist/esm/index.js",
   "packageManager": "pnpm@10.24.0",
   "peerDependencies": {
-    "@tanstack/db": "*",
     "@tanstack/query-core": "^5.0.0",
     "typescript": ">=4.7"
   },