feat: surface auto-mirror toggle in automation settings (refs #278) (#282)

The fix in v3.15.8 made scheduleConfig.autoMirror an independent trigger
in the scheduler, but it remained reachable only via the AUTO_MIRROR_REPOS
env var. This adds a UI checkbox under the Automatic Syncing section so
the option can be toggled per-config without touching the environment.

The toggle is conditional on scheduling being enabled (since auto-mirror
without a scheduler is meaningless) and is independent of the existing
"Auto-mirror new starred repositories" toggle in GitHub settings. Together
they cover the full owned/starred matrix that the scheduler already
supports.

Plumbing: config-mapper.ts now round-trips autoMirror through the UI/DB
boundary, and ScheduleConfig in types/config.ts gets the matching field.
No schema or migration change — autoMirror was already in the zod schema.

src/components/config/AutomationSettings.tsx

@@ -269,6 +269,31 @@ export function AutomationSettings({
                       </div>
                     </div>
                   </div>
+
+                  <div className="flex items-start space-x-3 pt-1">
+                    <Checkbox
+                      id="enable-auto-mirror-new"
+                      checked={scheduleConfig.autoMirror ?? false}
+                      className="mt-1.25"
+                      onCheckedChange={(checked) =>
+                        onScheduleChange({
+                          ...scheduleConfig,
+                          autoMirror: !!checked,
+                        })
+                      }
+                    />
+                    <div className="space-y-0.5 flex-1">
+                      <Label
+                        htmlFor="enable-auto-mirror-new"
+                        className="text-sm font-normal cursor-pointer"
+                      >
+                        Auto-mirror new repositories
+                      </Label>
+                      <p className="text-xs text-muted-foreground">
+                        Automatically mirror newly imported repositories on each scheduled sync. When off, new repos are imported for browsing but require a manual mirror click. (Starred repos have their own toggle in GitHub settings.)
+                      </p>
+                    </div>
+                  </div>
                 </div>
               )}
 

src/lib/utils/config-mapper.ts

@@ -246,6 +246,7 @@ export function mapUiScheduleToDb(uiSchedule: any, existing?: DbScheduleConfig):
     enabled: !!uiSchedule.enabled,
     interval: intervalExpression,
     timezone,
+    autoMirror: typeof uiSchedule.autoMirror === "boolean" ? uiSchedule.autoMirror : base.autoMirror,
     nextRun: scheduleChanged ? undefined : base.nextRun,
   } as DbScheduleConfig;
 }
@@ -264,6 +265,7 @@ export function mapDbScheduleToUi(dbSchedule: DbScheduleConfig): any {
       clockFrequencyHours: 24,
       startTime: "22:00",
       timezone: "UTC",
+      autoMirror: false,
       lastRun: null,
       nextRun: null,
     };
@@ -296,6 +298,7 @@ export function mapDbScheduleToUi(dbSchedule: DbScheduleConfig): any {
     clockFrequencyHours: parsedClockSchedule?.frequencyHours ?? 24,
     startTime: parsedClockSchedule?.startTime ?? "22:00",
     timezone: normalizeTimezone(dbSchedule.timezone || "UTC"),
+    autoMirror: dbSchedule.autoMirror ?? false,
     lastRun: dbSchedule.lastRun || null,
     nextRun: dbSchedule.nextRun || null,
   };

src/types/config.ts

@@ -36,6 +36,7 @@ export interface ScheduleConfig {
   clockFrequencyHours?: number;
   startTime?: string;
   timezone?: string;
+  autoMirror?: boolean;
   lastRun?: Date;
   nextRun?: Date;
 }