fix(core): keep emails and URLs in findFormValue

packages/core/src/types.test.ts

@@ -2,6 +2,7 @@ import { describe, it, expect } from "vitest";
 import {
   resolveDynamicValue,
   getByPath,
+  findFormValue,
   resolveRepeatStatePath,
   resolveRepeatItemStatePath,
   setByPath,
@@ -60,6 +61,38 @@ describe("getByPath", () => {
   });
 });
 
+describe("findFormValue", () => {
+  it("returns a direct param value", () => {
+    expect(findFormValue("name", { name: "Alice" })).toBe("Alice");
+  });
+
+  it("returns emails and other dotted literals from params", () => {
+    expect(findFormValue("email", { email: "john.doe@example.com" })).toBe(
+      "john.doe@example.com",
+    );
+    expect(findFormValue("site", { site: "https://example.com" })).toBe(
+      "https://example.com",
+    );
+    expect(findFormValue("version", { version: "1.2.3" })).toBe("1.2.3");
+  });
+
+  it("still resolves dotted path references against state", () => {
+    expect(
+      findFormValue(
+        "email",
+        { email: "form.email" },
+        { "form.email": "a@b.c" },
+      ),
+    ).toBe("a@b.c");
+  });
+
+  it("returns a dotted literal on a nested param key", () => {
+    expect(
+      findFormValue("email", { "form.email": "john.doe@example.com" }),
+    ).toBe("john.doe@example.com");
+  });
+});
+
 describe("resolveRepeatStatePath", () => {
   it("preserves string paths exactly", () => {
     expect(resolveRepeatStatePath("/items")).toBe("/items");

packages/core/src/types.ts

@@ -514,6 +514,14 @@ function deepEqual(a: unknown, b: unknown): boolean {
   return aKeys.every((key) => deepEqual(aObj[key], bObj[key]));
 }
 
+/**
+ * True for values that look like dotted state paths (`form.email`) rather
+ * than literals that happen to contain a dot (emails, URLs, versions).
+ */
+function isDotPathReference(val: string): boolean {
+  return /^[A-Za-z_][\w$]*(\.[A-Za-z_][\w$]*)+$/.test(val);
+}
+
 /**
  * Find a form value from params and/or state.
  * Useful in action handlers to locate form input values regardless of path format.
@@ -524,6 +532,10 @@ function deepEqual(a: unknown, b: unknown): boolean {
  * 3. State keys ending with the field name (dot notation)
  * 4. State path using getByPath (slash notation)
  *
+ * A string is treated as a path reference only when it looks like
+ * `form.email` (identifier.identifier). Emails, URLs, and versions are
+ * returned as literals.
+ *
  * @example
  * // Find "name" from params or state
  * const name = findFormValue("name", params, state);
@@ -538,8 +550,7 @@ export function findFormValue(
   // Check params first (but not if it looks like a state path reference)
   if (params?.[fieldName] !== undefined) {
     const val = params[fieldName];
-    // If the value looks like a path reference (contains dots), skip it
-    if (typeof val !== "string" || !val.includes(".")) {
+    if (typeof val !== "string" || !isDotPathReference(val)) {
       return val;
     }
   }
@@ -549,7 +560,7 @@ export function findFormValue(
     for (const key of Object.keys(params)) {
       if (key.endsWith(`.${fieldName}`)) {
         const val = params[key];
-        if (typeof val !== "string" || !val.includes(".")) {
+        if (typeof val !== "string" || !isDotPathReference(val)) {
           return val;
         }
       }