feat: retain application log history

apps/docs/docs/management/logs/index.mdx

@@ -0,0 +1,34 @@
+---
+tags:
+  - Administration
+  - Logs
+  - Troubleshooting
+---
+
+# Logs
+
+The logs page shows recent Homarr application logs and continues updating as new events occur. Use it to investigate
+widget, integration, and server errors without opening the container logs separately.
+
+## Opening the logs page
+
+Navigate to **Management** > **Tools** > **Logs**. The page and widget log links are only available to users with the
+**View logs** permission.
+
+When a widget reports an error, **Check logs for more details** opens the logs page in a new tab and marks the time when
+the widget displayed the error. The related server error normally appears immediately above that marker. If those logs
+have already been removed from the retained history, the marker explains that they are no longer available.
+
+## Retained and live logs
+
+Homarr retains the latest 5,000 log events in Redis. Opening the page first loads this history and then continues with
+live events without a gap. The history is bounded, so older events are removed automatically.
+
+The history survives normal application restarts when the configured Redis instance persists its data. For complete
+platform-level history, startup failures, or events older than the retained limit, use the logs provided by Docker or
+your deployment platform.
+
+## Display controls
+
+The severity selector applies to both retained and live events. Selecting a different level redraws the existing view
+using that threshold. The font-size control changes the terminal text size and is remembered in the browser.