分享码功能的实现，并修复了几个 bug

client/src/locales/data-en.json

@@ -287,6 +287,10 @@
       "addPresetTitle": "New preset",
       "addPresetNameEmpty": "Name cannot be empty",
       "addPresetNameExists": "That name already exists. Choose another.",
+      "overwritePresetTitle": "Preset name already exists",
+      "overwritePresetDesc": "A preset named \"{{name}}\" already exists. Overwrite it?",
+      "overwritePresetConfirm": "Overwrite",
+      "overwritePresetCancelled": "Cancelled",
       "toastAddPresetOk": "Preset added",
       "toastAddPresetFail": "Failed to add preset",
       "toastPresetLimitReached": "Preset limit reached ({{max}}). Delete some presets before adding more.",
@@ -360,6 +364,8 @@
       "shareCodeLabel": "Share Code",
       "shareCopied": "Code copied",
       "shareGenerating": "Generating…",
+      "shareCreateFail": "Failed to generate share code",
+      "shareExpireAt": "Expires at",
       "importTab": "Import EQ",
       "importCodeHint": "Enter or paste the 5-character share code",
       "importQuery": "Query",
@@ -367,13 +373,16 @@
       "importCodeNotFound": "Share code not found",
       "importEqName": "EQ Name",
       "importButton": "Import",
+      "importSaving": "Importing…",
       "importSuccess": "EQ imported successfully",
+      "importFail": "Failed to import EQ",
       "mySharesTab": "My Shares",
       "mySharesLoading": "Loading…",
       "mySharesEmpty": "No shared EQ yet",
       "mySharesCode": "Code",
       "mySharesName": "EQ Name",
-      "mySharesLoadFail": "Failed to load share list"
+      "mySharesLoadFail": "Failed to load share list",
+      "importCodeNotFound": "Share code not found or expired"
     }
   },
   "dac": {