docs: standardize markdown syntax and remove deprecated sensor-proxy docs

docs/TROUBLESHOOTING.md

@@ -34,56 +34,56 @@ sudo pulse bootstrap-token
 
 ### Authentication
 
-**"Invalid username or password" after setup**
+#### "Invalid username or password" after setup
 - **Docker Compose**: Did you escape the `$` signs in your hash? Use `$$2a$$...`.
 - **Truncated Hash**: Ensure your bcrypt hash is exactly 60 characters.
 
-**Cannot login / 401 Unauthorized**
+#### Cannot login / 401 Unauthorized
 - Clear browser cookies.
 - Check if your IP is locked out (wait 15 mins).
 - If another admin can log in, use `POST /api/security/reset-lockout` to clear the lockout for your username or IP.
 
-**Audit Log verification shows unsigned events**
+#### Audit Log verification shows unsigned events
 - **Symptom**: Audit Log entries show “Unsigned” or verification fails in the UI.
 - **Root cause**: `PULSE_AUDIT_SIGNING_KEY` is not set, so events are stored without signatures.
 - **Fix**: Set `PULSE_AUDIT_SIGNING_KEY` and restart Pulse Pro. Newly created events will be signed; existing unsigned events remain unsigned.
 
-**Audit Log is empty**
+#### Audit Log is empty
 - **Symptom**: Audit Log shows zero events or "Console Logging Only."
 - **Root cause**: OSS build uses console logging only, or Pulse Pro audit logging is not enabled.
 - **Fix**: Use Pulse Pro with audit logging enabled, then generate new audit events (logins, token creation, password changes).
 
-**Audit Log verification fails for older events**
+#### Audit Log verification fails for older events
 - **Symptom**: Older events fail verification while newer events pass.
 - **Root cause**: The signing key changed or was rotated, so signatures no longer match.
 - **Fix**: Keep `PULSE_AUDIT_SIGNING_KEY` stable. If rotated intentionally, expect older events to fail verification.
 
 ### Monitoring Data
 
-**VMs show "-" for disk usage**
+#### VMs show "-" for disk usage
 - Install **QEMU Guest Agent** in the VM.
 - Enable "QEMU Guest Agent" in Proxmox VM Options.
 - Restart the VM.
 - See [VM Disk Monitoring](VM_DISK_MONITORING.md).
 
-**Temperature data missing**
+#### Temperature data missing
 - Install `lm-sensors` on the host.
 - Run `sensors-detect`.
 - Install the unified agent on the Proxmox host with `--enable-proxmox`.
 - See [Temperature Monitoring](TEMPERATURE_MONITORING.md).
 
-**Docker hosts appearing/disappearing**
+#### Docker hosts appearing/disappearing
 - **Duplicate IDs**: Cloned VMs often share `/etc/machine-id`.
 - **Fix**: Run `rm /etc/machine-id && systemd-machine-id-setup` on the clone.
 
 ### Notifications
 
-**Emails not sending**
+#### Emails not sending
 - Check SMTP settings in **Alerts → Notification Destinations**.
 - Check logs: `docker logs pulse | grep email`.
 - Ensure your SMTP provider allows the connection (e.g., Gmail App Passwords).
 
-**Webhooks failing**
+#### Webhooks failing
 - Verify the URL is reachable from the Pulse server.
 - If targeting private IPs, allow them in **Settings → System → Network → Webhook Security**.
 - Check Pulse logs for HTTP status codes and response bodies.