fix(sqlite): normalize database context routing

apps/desktop/src/lib/database/sqliteNamespace.ts

@@ -0,0 +1,36 @@
+import type { ConnectionConfig } from "@/types/database";
+
+const WINDOWS_DRIVE_PATH_RE = /^[a-z]:[\\/]/i;
+
+type SqliteNamespaceConnection = Partial<Pick<ConnectionConfig, "host" | "database">>;
+
+export function isSqliteFileNamespace(value: string | undefined, connection?: SqliteNamespaceConnection): boolean {
+  const normalized = value?.trim() || "";
+  if (!normalized) return false;
+
+  const lower = normalized.toLowerCase();
+  const connectionHost = connection?.host?.trim() || "";
+  return (
+    lower === ":memory:" ||
+    lower.startsWith("file:") ||
+    lower.startsWith("sqlite:") ||
+    WINDOWS_DRIVE_PATH_RE.test(normalized) ||
+    normalized.startsWith("/") ||
+    normalized.startsWith("\\") ||
+    normalized.startsWith("~/") ||
+    normalized.startsWith("./") ||
+    normalized.startsWith("../") ||
+    normalized.includes("/") ||
+    normalized.includes("\\") ||
+    normalized === connectionHost
+  );
+}
+
+export function normalizeSqliteNamespace(value: string | undefined, connection?: SqliteNamespaceConnection): string {
+  const normalized = value?.trim() || "";
+  return !normalized || isSqliteFileNamespace(normalized, connection) ? "main" : normalized;
+}
+
+export function normalizeStoredConnectionDatabase(dbType: ConnectionConfig["db_type"], database: string | undefined): string | undefined {
+  return dbType === "sqlite" ? undefined : database;
+}