fix: preserve operation outcomes during plug-in shutdown

Keep API logging callable after display cleanup by forwarding late messages to the console. Abort conflict-check admission and pending dispatch, and propagate cancellation to waiters.

Let started data operations follow their existing success and failure paths without delaying database close. Verify repeated shutdown, instance isolation, and unload/reload in unit, PouchDB, and real Obsidian tests.

test/e2e-obsidian/scripts/conflict-dialog-policy.ts

@@ -58,6 +58,7 @@ type ObsidianTestApp = {
 type ObsidianTestGlobal = typeof globalThis & {
     app?: ObsidianTestApp;
     __livesyncConflictChecksCompleted?: boolean;
+    __livesyncConflictChecksResult?: boolean;
     __livesyncWaitingConflictCompleted?: boolean;
     __livesyncConflictChecksError?: string;
     __livesyncWaitingConflictError?: string;
@@ -76,6 +77,7 @@ async function recordConflictDiagnostics(port: number, label: string) {
                     pluginLoaded: plugin !== undefined,
                     queueCount: conflict?.conflictProcessQueueCount.value,
                     checksCompleted: host.__livesyncConflictChecksCompleted,
+                    checksResult: host.__livesyncConflictChecksResult,
                     waitingCompleted: host.__livesyncWaitingConflictCompleted,
                     checksError: host.__livesyncConflictChecksError,
                     waitingError: host.__livesyncWaitingConflictError,
@@ -376,9 +378,11 @@ async function disableLiveSyncAndWaitForConflictChecks(port: number): Promise<vo
             if (conflict === undefined) throw new Error("LiveSync conflict service is unavailable before unload");
             host.__livesyncObservedConflict = conflict;
             host.__livesyncConflictChecksCompleted = false;
+            host.__livesyncConflictChecksResult = undefined;
             host.__livesyncConflictChecksError = undefined;
             void conflict.ensureAllProcessed().then(
-                () => {
+                (result) => {
+                    host.__livesyncConflictChecksResult = result;
                     host.__livesyncConflictChecksCompleted = true;
                 },
                 (error) => {
@@ -403,6 +407,8 @@ async function disableLiveSyncAndWaitForConflictChecks(port: number): Promise<vo
             undefined,
             { timeout: uiTimeoutMs }
         );
+        const result = await page.evaluate(() => (globalThis as ObsidianTestGlobal).__livesyncConflictChecksResult);
+        if (result !== false) throw new Error("Unloading LiveSync did not report conflict-check cancellation");
     });
 }
 
@@ -938,7 +944,7 @@ async function main(): Promise<void> {
         await waitForConflictChecks(cliBinary, session.cliEnv);
 
         console.log(
-            "Real Obsidian preserved pairwise conflict resolution and dialogue presentation; replaced only stale same-file dialogues; serialised different files; discarded externally resolved waiting requests; and drained active and waiting requests across unload and reload."
+            "Real Obsidian preserved pairwise conflict resolution and dialogue presentation; replaced only stale same-file dialogues; serialised different files; discarded externally resolved waiting requests; and reported cancellation while closing active and waiting requests across unload and reload."
         );
         console.log(`Dialogue screenshot: ${firstDialogueScreenshot}`);
         console.log(`Postponed warning screenshot: ${warningScreenshot}`);