feat: add temp storage shelf (B prefix) UI support

Recognize B-prefix location codes as temp storage shelves. Add purple
color scheme, conflict detection for temp_stored status, and updated
submit/dialog logic for temp storage target handling.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

lib/services/code_parser.dart

@@ -1,14 +1,8 @@
 // lib/services/code_parser.dart
 class CodeParser {
-  static final _zongpaiRegex = RegExp(
-    r'^\d{2}(B|C|T)\d+$|^\d{2}(BW|CW)\d{4}$',
-  );
-  static final _locationRegex = RegExp(
-    r'^[A-Z0-9]+-[A-Z0-9]+-[A-Z0-9]+$',
-  );
-  static final _transitRegex = RegExp(
-    r'^TRANS-',
-  );
+  static final _zongpaiRegex = RegExp(r'^\d{2}(B|C|T)\d+$|^\d{2}(BW|CW)\d{4}$');
+  static final _locationRegex = RegExp(r'^[A-Z0-9]+-[A-Z0-9]+-[A-Z0-9]+$');
+  static final _transitRegex = RegExp(r'^TRANS-');
 
   static ParseResult parse(String code) {
     final trimmed = code.trim();
@@ -23,16 +17,30 @@ class CodeParser {
       return ParseResult(type: CodeType.zongpaiNo, value: normalized);
     }
     if (_locationRegex.hasMatch(normalized)) {
+      if (normalized.startsWith('B')) {
+        return ParseResult(
+          type: CodeType.locationTempStorage,
+          value: normalized,
+        );
+      }
       return ParseResult(type: CodeType.locationNormal, value: normalized);
     }
     return ParseResult(type: CodeType.invalid, value: code);
   }
 
   static bool isLocation(CodeType type) =>
-      type == CodeType.locationNormal || type == CodeType.locationTransit;
+      type == CodeType.locationNormal ||
+      type == CodeType.locationTransit ||
+      type == CodeType.locationTempStorage;
 }
 
-enum CodeType { zongpaiNo, locationNormal, locationTransit, invalid }
+enum CodeType {
+  zongpaiNo,
+  locationNormal,
+  locationTransit,
+  locationTempStorage,
+  invalid,
+}
 
 class ParseResult {
   final CodeType type;

lib/services/registration_linking.dart

@@ -8,13 +8,20 @@ bool isTransitTarget(CodeType? locationType, String? locationCode) {
       (locationCode?.startsWith('TRANS-') ?? false);
 }
 
+bool isTempStorageTarget(CodeType? locationType, String? locationCode) {
+  return locationType == CodeType.locationTempStorage ||
+      (locationCode?.startsWith('B') ?? false);
+}
+
 String registrationSubmitLabel({
   required bool isTransitTarget,
   required bool isMultiCode,
   required int zongpaiCount,
 }) {
   if (!isTransitTarget) {
-    return isMultiCode && zongpaiCount > 1 ? '批量上架（$zongpaiCount 条）' : '确 认 上 架';
+    return isMultiCode && zongpaiCount > 1
+        ? '批量上架（$zongpaiCount 条）'
+        : '确 认 上 架';
   }
   return isMultiCode && zongpaiCount > 1 ? '批量转运并凑箱（$zongpaiCount 条）' : '转运并装箱';
 }