fix(t86 🔴): 換知識庫實例時清空看守資料夾——堵個資外洩

leo 07-28 實測坐實：youlin 時代的資料夾被原封同步進 geek6688 新實例（「假如我把個人的同步到官方去就很危險，個資外泄」）。修：instanceChanged(old,new) 比 host；連線精靈成功後若換了實例→清空 WatchFolders/WatchFolder，成功對話框改為說明「因為換了知識庫，為避免把舊資料夾誤傳到新知識庫，請重新用『＋新增知識資料夾…』選擇」；同實例改密碼行為照舊。測試（main_test.go）：host 異同判定含大小寫/尾斜線/scheme 差異。tray go test 綠。（實作＝子 CC；審查+commit＝總管。⚠️ manifest 沿用＝t86b 另案未含）
2026-07-28 12:03:20 +08:00
parent fb63d9f0c4
commit 0deef3dbd9
2 changed files with 128 additions and 4 deletions
@@ -92,3 +92,94 @@ func TestDirectConfigJSONOmitsEmptyInstanceName(t *testing.T) {
 		t.Errorf("暱稱空時不該序列化出 instance_name 欄：%s", data)
 	}
 }
+
+// ── t86：instanceChanged ─────────────────────────────────────────────────────
+
+func TestInstanceChanged(t *testing.T) {
+	cases := []struct {
+		name   string
+		oldURL string
+		newURL string
+		want   bool
+	}{
+		{
+			"同 host 同實例改密碼不觸發清空",
+			"https://arcrun-cypher-executor.youlin.workers.dev",
+			"https://arcrun-cypher-executor.youlin.workers.dev",
+			false,
+		},
+		{
+			"不同 host 換實例觸發清空",
+			"https://arcrun-cypher-executor.youlin.workers.dev",
+			"https://arcrun-cypher-executor.geek6688.workers.dev",
+			true,
+		},
+		{
+			"舊 URL 空（首次設定）不觸發清空",
+			"",
+			"https://arcrun-cypher-executor.geek6688.workers.dev",
+			false,
+		},
+		{
+			"新 URL 空（異常值）不觸發清空",
+			"https://arcrun-cypher-executor.youlin.workers.dev",
+			"",
+			false,
+		},
+	}
+	for _, c := range cases {
+		t.Run(c.name, func(t *testing.T) {
+			got := instanceChanged(c.oldURL, c.newURL)
+			if got != c.want {
+				t.Errorf("instanceChanged(%q, %q) = %v, want %v", c.oldURL, c.newURL, got, c.want)
+			}
+		})
+	}
+}
+
+// t86：換實例後 applyRemoteConfig 清空資料夾清單
+func TestApplyRemoteConfigClearsFoldersOnInstanceSwitch(t *testing.T) {
+	cfg := &directConfig{
+		CypherURL:    "https://arcrun-cypher-executor.youlin.workers.dev",
+		Namespace:    "youlin",
+		WatchFolder:  "/Users/youlin/KnowledgeBase",
+		WatchFolders: []string{"/Users/youlin/KnowledgeBase", "/Users/youlin/Finance"},
+	}
+	r := &daemonConfigResp{}
+	r.Config.CypherURL = "https://arcrun-cypher-executor.geek6688.workers.dev"
+	r.Config.Namespace = "geek6688"
+
+	switched := applyRemoteConfig(cfg, r)
+
+	if !switched {
+		t.Error("換了不同 host 應回傳 switched=true")
+	}
+	if cfg.WatchFolder != "" {
+		t.Errorf("換實例後 WatchFolder 應清空，got %q", cfg.WatchFolder)
+	}
+	if len(cfg.WatchFolders) != 0 {
+		t.Errorf("換實例後 WatchFolders 應清空，got %v", cfg.WatchFolders)
+	}
+}
+
+// t86：同實例改密碼不清空資料夾清單
+func TestApplyRemoteConfigKeepsFoldersOnSameInstance(t *testing.T) {
+	cfg := &directConfig{
+		CypherURL:    "https://arcrun-cypher-executor.youlin.workers.dev",
+		Namespace:    "youlin",
+		WatchFolder:  "/Users/youlin/KnowledgeBase",
+		WatchFolders: []string{"/Users/youlin/KnowledgeBase"},
+	}
+	r := &daemonConfigResp{}
+	r.Config.CypherURL = "https://arcrun-cypher-executor.youlin.workers.dev"
+	r.Config.Namespace = "youlin"
+
+	switched := applyRemoteConfig(cfg, r)
+
+	if switched {
+		t.Error("同 host 不應回傳 switched=true")
+	}
+	if cfg.WatchFolder == "" || len(cfg.WatchFolders) == 0 {
+		t.Error("同實例不應清空資料夾清單")
+	}
+}