Decouple stats daemon and preserve final mine OSD status

- Run `subminer stats -b` as a dedicated daemon process, independent from the overlay app
- Stop Anki progress spinner before showing final `✓`/`x` mine result so it is not overwritten
- Keep grammar/noise subtitle tokens hoverable while stripping annotation metadata

launcher/commands/stats-command.ts

@@ -1,7 +1,7 @@
 import fs from 'node:fs';
 import os from 'node:os';
 import path from 'node:path';
-import { launchAppCommandDetached, runAppCommandAttached } from '../mpv.js';
+import { runAppCommandAttached } from '../mpv.js';
 import { sleep } from '../util.js';
 import type { LauncherCommandContext } from './context.js';
 
@@ -20,12 +20,6 @@ type StatsCommandDeps = {
     logLevel: LauncherCommandContext['args']['logLevel'],
     label: string,
   ) => Promise<number>;
-  launchAppCommandDetached: (
-    appPath: string,
-    appArgs: string[],
-    logLevel: LauncherCommandContext['args']['logLevel'],
-    label: string,
-  ) => void;
   waitForStatsResponse: (responsePath: string) => Promise<StatsCommandResponse>;
   removeDir: (targetPath: string) => void;
 };
@@ -37,8 +31,6 @@ const defaultDeps: StatsCommandDeps = {
   joinPath: (...parts) => path.join(...parts),
   runAppCommandAttached: (appPath, appArgs, logLevel, label) =>
     runAppCommandAttached(appPath, appArgs, logLevel, label),
-  launchAppCommandDetached: (appPath, appArgs, logLevel, label) =>
-    launchAppCommandDetached(appPath, appArgs, logLevel, label),
   waitForStatsResponse: async (responsePath) => {
     const deadline = Date.now() + STATS_STARTUP_RESPONSE_TIMEOUT_MS;
     while (Date.now() < deadline) {
@@ -75,12 +67,15 @@ export async function runStatsCommand(
   const responsePath = resolvedDeps.joinPath(tempDir, 'response.json');
 
   try {
-    const forwarded = ['--stats', '--stats-response-path', responsePath];
-    if (args.statsBackground) {
-      forwarded.push('--stats-background');
-    }
-    if (args.statsStop) {
-      forwarded.push('--stats-stop');
+    const forwarded = args.statsCleanup
+      ? ['--stats', '--stats-response-path', responsePath]
+      : [
+          args.statsStop ? '--stats-daemon-stop' : '--stats-daemon-start',
+          '--stats-response-path',
+          responsePath,
+        ];
+    if (!args.statsCleanup && !args.statsBackground && !args.statsStop) {
+      forwarded.push('--stats-daemon-open-browser');
     }
     if (args.statsCleanup) {
       forwarded.push('--stats-cleanup');
@@ -94,14 +89,6 @@ export async function runStatsCommand(
     if (args.logLevel !== 'info') {
       forwarded.push('--log-level', args.logLevel);
     }
-    if (args.statsBackground) {
-      resolvedDeps.launchAppCommandDetached(appPath, forwarded, args.logLevel, 'stats');
-      const startupResult = await resolvedDeps.waitForStatsResponse(responsePath);
-      if (!startupResult.ok) {
-        throw new Error(startupResult.error || 'Stats dashboard failed to start.');
-      }
-      return true;
-    }
     const attachedExitPromise = resolvedDeps.runAppCommandAttached(
       appPath,
       forwarded,