fix: Resolve infinite SQLite logging loop blocking Electron startup

- Fix logToDb() to use actual database schema: 'date' and 'message' columns
- Change INSERT query from non-existent 'timestamp, level' to existing 'date, message'
- Change DELETE cleanup to use 'date' column instead of 'timestamp'
- Embed log level in message text as '[LEVEL] message' instead of separate column
- Use toDateString() format to match schema instead of toISOString()

Resolves: "table logs has no column named timestamp" infinite error loop
Critical: Enables Electron app initialization by matching code to existing schema
Impact: Stops database logging from crashing and allows normal app startup

.cursor/rules/legacy_dexie.mdc

@@ -0,0 +1,6 @@
+---
+description: 
+globs: 
+alwaysApply: true
+---
+All references in the codebase to Dexie apply only to migration from IndexedDb to Sqlite and will be deprecated in future versions.