Add Deactivate Jail button for inactive jails with local override

- Add has_local_override field to InactiveJail model
- Update _build_inactive_jail and list_inactive_jails to compute the field
- Add delete_jail_local_override() service function
- Add DELETE /api/config/jails/{name}/local router endpoint
- Surface has_local_override in frontend InactiveJail type
- Show Deactivate Jail button in JailsTab when has_local_override is true
- Add tests: TestBuildInactiveJail, TestListInactiveJails, TestDeleteJailLocalOverride

frontend/src/components/config/JailsTab.tsx

@@ -35,6 +35,7 @@ import { ApiError } from "../../api/client";
 import {
   addLogPath,
   deactivateJail,
+  deleteJailLocalOverride,
   deleteLogPath,
   fetchInactiveJails,
   fetchJailConfigFileContent,
@@ -573,7 +574,7 @@ function JailConfigDetail({
         </div>
       )}
 
-      {readOnly && (onActivate !== undefined || onValidate !== undefined) && (
+      {readOnly && (onActivate !== undefined || onValidate !== undefined || onDeactivate !== undefined) && (
         <div style={{ marginTop: tokens.spacingVerticalM, display: "flex", gap: tokens.spacingHorizontalS, flexWrap: "wrap" }}>
           {onValidate !== undefined && (
             <Button
@@ -585,6 +586,15 @@ function JailConfigDetail({
               {validating ? "Validating…" : "Validate Config"}
             </Button>
           )}
+          {onDeactivate !== undefined && (
+            <Button
+              appearance="secondary"
+              icon={<LockOpen24Regular />}
+              onClick={onDeactivate}
+            >
+              Deactivate Jail
+            </Button>
+          )}
           {onActivate !== undefined && (
             <Button
               appearance="primary"
@@ -618,8 +628,8 @@ function JailConfigDetail({
 interface InactiveJailDetailProps {
   jail: InactiveJail;
   onActivate: () => void;
-  /** Whether to show and call onCrashDetected on activation crash. */
-  onCrashDetected?: () => void;
+  /** Called when the user requests removal of the .local override file. */
+  onDeactivate?: () => void;
 }
 
 /**
@@ -636,6 +646,7 @@ interface InactiveJailDetailProps {
 function InactiveJailDetail({
   jail,
   onActivate,
+  onDeactivate,
 }: InactiveJailDetailProps): React.JSX.Element {
   const styles = useConfigStyles();
   const [validating, setValidating] = useState(false);
@@ -729,6 +740,7 @@ function InactiveJailDetail({
         onSave={async () => { /* read-only — never called */ }}
         readOnly
         onActivate={onActivate}
+        onDeactivate={jail.has_local_override ? onDeactivate : undefined}
         onValidate={handleValidate}
         validating={validating}
       />
@@ -746,12 +758,7 @@ function InactiveJailDetail({
  *
  * @returns JSX element.
  */
-export interface JailsTabProps {
-  /** Called when fail2ban stopped responding after a jail was activated. */
-  onCrashDetected?: () => void;
-}
-
-export function JailsTab({ onCrashDetected }: JailsTabProps = {}): React.JSX.Element {
+export function JailsTab(): React.JSX.Element {
   const styles = useConfigStyles();
   const { jails, loading, error, refresh, updateJail } =
     useJailConfigs();
@@ -786,6 +793,15 @@ export function JailsTab({ onCrashDetected }: JailsTabProps = {}): React.JSX.Ele
       .catch(() => { /* non-critical — list refreshes on next load */ });
   }, [refresh, loadInactive]);
 
+  const handleDeactivateInactive = useCallback((name: string): void => {
+    deleteJailLocalOverride(name)
+      .then(() => {
+        setSelectedName(null);
+        loadInactive();
+      })
+      .catch(() => { /* non-critical — list refreshes on next load */ });
+  }, [loadInactive]);
+
   const handleActivated = useCallback((): void => {
     setActivateTarget(null);
     setSelectedName(null);
@@ -890,7 +906,11 @@ export function JailsTab({ onCrashDetected }: JailsTabProps = {}): React.JSX.Ele
             <InactiveJailDetail
               jail={selectedInactiveJail}
               onActivate={() => { setActivateTarget(selectedInactiveJail); }}
-              onCrashDetected={onCrashDetected}
+              onDeactivate={
+                selectedInactiveJail.has_local_override
+                  ? (): void => { handleDeactivateInactive(selectedInactiveJail.name); }
+                  : undefined
+              }
             />
           ) : null}
         </ConfigListDetail>
@@ -901,7 +921,6 @@ export function JailsTab({ onCrashDetected }: JailsTabProps = {}): React.JSX.Ele
         open={activateTarget !== null}
         onClose={() => { setActivateTarget(null); }}
         onActivated={handleActivated}
-        onCrashDetected={onCrashDetected}
       />
 
       <CreateJailDialog

frontend/src/components/config/__tests__/ActivateJailDialog.test.tsx

@@ -6,7 +6,6 @@
  *  - "Activate" button is enabled when validation passes.
  *  - Dialog stays open and shows an error when the backend returns active=false.
  *  - `onActivated` is called and dialog closes when backend returns active=true.
- *  - `onCrashDetected` is called when fail2ban_running is false after activation.
  */
 
 import { describe, it, expect, vi, beforeEach } from "vitest";
@@ -55,6 +54,7 @@ const baseJail: InactiveJail = {
   bantime_escalation: null,
   source_file: "/config/fail2ban/jail.d/airsonic-auth.conf",
   enabled: false,
+  has_local_override: false,
 };
 
 /** Successful activation response. */
@@ -98,7 +98,6 @@ interface DialogProps {
   open?: boolean;
   onClose?: () => void;
   onActivated?: () => void;
-  onCrashDetected?: () => void;
 }
 
 function renderDialog({
@@ -106,7 +105,6 @@ function renderDialog({
   open = true,
   onClose = vi.fn(),
   onActivated = vi.fn(),
-  onCrashDetected = vi.fn(),
 }: DialogProps = {}) {
   return render(
     <FluentProvider theme={webLightTheme}>
@@ -115,7 +113,6 @@ function renderDialog({
         open={open}
         onClose={onClose}
         onActivated={onActivated}
-        onCrashDetected={onCrashDetected}
       />
     </FluentProvider>,
   );
@@ -202,28 +199,4 @@ describe("ActivateJailDialog", () => {
       expect(onActivated).toHaveBeenCalledOnce();
     });
   });
-
-  it("calls onCrashDetected when fail2ban_running is false after activation", async () => {
-    mockValidateJailConfig.mockResolvedValue(validationPassed);
-    mockActivateJail.mockResolvedValue({
-      ...successResponse,
-      fail2ban_running: false,
-    });
-
-    const onActivated = vi.fn();
-    const onCrashDetected = vi.fn();
-    renderDialog({ onActivated, onCrashDetected });
-
-    await waitFor(() => {
-      expect(screen.queryByText(/validating configuration/i)).not.toBeInTheDocument();
-    });
-
-    const activateBtn = screen.getByRole("button", { name: /^activate$/i });
-    await userEvent.click(activateBtn);
-
-    await waitFor(() => {
-      expect(onCrashDetected).toHaveBeenCalledOnce();
-    });
-    expect(onActivated).toHaveBeenCalledOnce();
-  });
 });