# Issue #10: Advanced Access Logging Implementation

## Overview
Implemented a comprehensive access logging system that parses Caddy's structured JSON logs, provides a searchable/filterable UI, and allows for log downloads.

## Backend Implementation
- **Model**: `CaddyAccessLog` struct in `internal/models/log_entry.go` matching Caddy's JSON format.
- **Service**: `LogService` in `internal/services/log_service.go` updated to:
  - Parse JSON logs line-by-line.
  - Support filtering by search term (request/host/client_ip), host, and status code.
  - Support pagination.
  - Handle legacy/plain text logs gracefully.
- **API**: `LogsHandler` in `internal/api/handlers/logs_handler.go` updated to:
  - Accept query parameters (`page`, `limit`, `search`, `host`, `status`).
  - Provide a `Download` endpoint for raw log files.

## Frontend Implementation
- **Components**:
  - `LogTable.tsx`: Displays logs in a structured table with status badges and duration formatting.
  - `LogFilters.tsx`: Provides search input and dropdowns for Host and Status filtering.
- **Page**: `Logs.tsx` updated to integrate the new components and manage state (pagination, filters).
- **Dependencies**: Added `date-fns` for date formatting.

## Verification
- **Backend Tests**: `go test ./internal/services/... ./internal/api/handlers/...` passed.
- **Frontend Build**: `npm run build` passed.
- **Manual Check**: Verified log parsing and filtering logic via unit tests.

## Next Steps
- Ensure Caddy is configured to output JSON logs (already done in previous phases).
- Monitor log file sizes and rotation (handled by `lumberjack` in previous phases).