feat: add SQL query tool, platform debug, loyalty settings, and multi-module improvements

- Add admin SQL query tool with saved queries, schema explorer presets,
  and collapsible category sections (dev_tools module)
- Add platform debug tool for admin diagnostics
- Add loyalty settings page with owner-only access control
- Fix loyalty settings owner check (use currentUser instead of window.__userData)
- Replace HTTPException with AuthorizationException in loyalty routes
- Expand loyalty module with PIN service, Apple Wallet, program management
- Improve store login with platform detection and multi-platform support
- Update billing feature gates and subscription services
- Add store platform sync improvements and remove is_primary column
- Add unit tests for loyalty (PIN, points, stamps, program services)
- Update i18n translations across dev_tools locales

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

app/modules/dev_tools/models/saved_query.py

@@ -0,0 +1,34 @@
+# app/modules/dev_tools/models/saved_query.py
+"""
+Saved SQL Query Model
+
+Database model for storing frequently-used SQL queries.
+"""
+
+from sqlalchemy import Column, DateTime, ForeignKey, Integer, String, Text
+from sqlalchemy.sql import func
+
+from app.core.database import Base
+
+
+class SavedQuery(Base):
+    """A saved SQL query for quick re-running from the admin UI."""
+
+    __tablename__ = "dev_tools_saved_queries"
+
+    id = Column(Integer, primary_key=True, index=True)
+    name = Column(String(200), nullable=False, index=True)
+    description = Column(Text, nullable=True)
+    sql_text = Column(Text, nullable=False)
+    created_by = Column(Integer, ForeignKey("users.id"), nullable=False)
+    last_run_at = Column(DateTime(timezone=True), nullable=True)
+    run_count = Column(Integer, default=0, server_default="0")
+    created_at = Column(
+        DateTime(timezone=True), server_default=func.now(), nullable=False
+    )
+    updated_at = Column(
+        DateTime(timezone=True),
+        server_default=func.now(),
+        onupdate=func.now(),
+        nullable=False,
+    )