Improve local auth env handling and fallbacks

Allow local env files to reliably override authentication feature flags (SMS/WeChat) by whitelisting keys in scripts/dev-utils.mjs and adding a unit test. Add SMS checks to scripts/check-api-server-env.mjs. Make server config.parse_bool tolerant of shell-wrapped quoted values (e.g. '"true"') and add tests so SMS_AUTH_ENABLED is parsed correctly when shells supply quotes. Update docs to clarify SMS env behaviour, restart requirements, and add guidance + a CSS fallback for old mobile browsers (QQ/X5) so public cover images render even when aspect-ratio is unsupported. Also include related frontend test and component adjustments and add puzzle onboarding handlers/endpoints in server-rs/crates/api-server/src/puzzle.rs.

src/components/platform-entry/PlatformEntryFlowShellImpl.tsx

@@ -1718,6 +1718,10 @@ function isMiniGameDraftGenerating(state: MiniGameDraftGenerationState | null) {
   return Boolean(state && state.phase !== 'ready' && state.phase !== 'failed');
 }
 
+function isPersistedDraftGenerating(value: string | null | undefined) {
+  return value?.trim() === 'generating';
+}
+
 function resolveProfileWalletBalance(
   dashboard: { walletBalance?: number | null } | null | undefined,
 ) {
@@ -8750,7 +8754,7 @@ export function PlatformEntryFlowShellImpl({
         item.sourceSessionId,
         buildPuzzleResultWorkId(item.sourceSessionId),
         buildPuzzleResultProfileId(item.sourceSessionId),
-      ]);
+      ]) || isPersistedDraftGenerating(item.generationStatus);
       setPuzzleOperation(null);
       setPuzzleRun(null);
       setPuzzleRuntimeAuthMode('default');
@@ -8897,7 +8901,7 @@ export function PlatformEntryFlowShellImpl({
         item.workId,
         item.profileId,
         item.sourceSessionId,
-      ]);
+      ]) || isPersistedDraftGenerating(item.generationStatus);
 
       const backgroundTask = getMatch3DBackgroundCompileTask(
         item.sourceSessionId,
@@ -8972,7 +8976,10 @@ export function PlatformEntryFlowShellImpl({
           setMatch3DFormDraftPayload(null);
           setMatch3DProfile(null);
           setMatch3DGenerationState(
-            createMiniGameDraftGenerationState('match3d'),
+            createMiniGameDraftGenerationStateFromStartedAt(
+              'match3d',
+              parseDraftGenerationStartedAtMs(item.updatedAt),
+            ),
           );
           enterCreateTab();
           selectionStageRef.current = 'match3d-generating';