fix: correct tojson|safe usage in templates and update validator

- Remove |safe from |tojson in HTML attributes (x-data) - quotes must
  become " for browsers to parse correctly
- Update LANG-002 and LANG-003 architecture rules to document correct
  |tojson usage patterns:
  - HTML attributes: |tojson (no |safe)
  - Script blocks: |tojson|safe
- Fix validator to warn when |tojson|safe is used in x-data (breaks
  HTML attribute parsing)
- Improve code quality across services, APIs, and tests

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

app/services/log_service.py

@@ -11,7 +11,6 @@ This module provides functions for:
 """
 
 import logging
-import os
 from datetime import UTC, datetime, timedelta
 from pathlib import Path
 
@@ -58,7 +57,9 @@ class LogService:
                 conditions.append(ApplicationLog.level == filters.level.upper())
 
             if filters.logger_name:
-                conditions.append(ApplicationLog.logger_name.like(f"%{filters.logger_name}%"))
+                conditions.append(
+                    ApplicationLog.logger_name.like(f"%{filters.logger_name}%")
+                )
 
             if filters.module:
                 conditions.append(ApplicationLog.module.like(f"%{filters.module}%"))
@@ -215,7 +216,8 @@ class LogService:
         except Exception as e:
             logger.error(f"Failed to get log statistics: {e}")
             raise AdminOperationException(
-                operation="get_log_statistics", reason=f"Database query failed: {str(e)}"
+                operation="get_log_statistics",
+                reason=f"Database query failed: {str(e)}",
             )
 
     def get_file_logs(
@@ -252,7 +254,7 @@ class LogService:
             stat = log_file.stat()
 
             # Read last N lines efficiently
-            with open(log_file, "r", encoding="utf-8", errors="replace") as f:
+            with open(log_file, encoding="utf-8", errors="replace") as f:
                 # For large files, seek to end and read backwards
                 all_lines = f.readlines()
                 log_lines = all_lines[-lines:] if len(all_lines) > lines else all_lines
@@ -349,16 +351,21 @@ class LogService:
             db.rollback()
             logger.error(f"Failed to cleanup old logs: {e}")
             raise AdminOperationException(
-                operation="cleanup_old_logs", reason=f"Delete operation failed: {str(e)}"
+                operation="cleanup_old_logs",
+                reason=f"Delete operation failed: {str(e)}",
             )
 
     def delete_log(self, db: Session, log_id: int) -> str:
         """Delete a specific log entry."""
         try:
-            log_entry = db.query(ApplicationLog).filter(ApplicationLog.id == log_id).first()
+            log_entry = (
+                db.query(ApplicationLog).filter(ApplicationLog.id == log_id).first()
+            )
 
             if not log_entry:
-                raise ResourceNotFoundException(resource_type="log", identifier=str(log_id))
+                raise ResourceNotFoundException(
+                    resource_type="log", identifier=str(log_id)
+                )
 
             db.delete(log_entry)
             db.commit()