diff --git a/bin/lint b/bin/lint
index b74d5972..59071371 100755
--- a/bin/lint
+++ b/bin/lint
@@ -125,6 +125,18 @@ run_phpunit() {
     fi
 }
 
+run_vitest() {
+    echo -e "${BOLD}${TEST_TUBE} Running Vitest Tests${RESET}"
+
+    if npm run test -- --run; then
+        echo -e "${CHECK} ${GREEN}Vitest tests passed successfully${RESET}\n"
+        return 0
+    else
+        echo -e "${WARNING} ${YELLOW}Vitest tests failed${RESET}\n"
+        return 1
+    fi
+}
+
 main() {
     local start_time=$(date +%s)
     local issues_found=false
@@ -138,6 +150,7 @@ main() {
     validate_composer_files || issues_found=true
     run_phplint || issues_found=true
     run_phpunit || issues_found=true
+    run_vitest || issues_found=true
 
     local end_time=$(date +%s)
     local duration=$((end_time - start_time))
diff --git a/phpstan.neon.dist b/phpstan.neon.dist
index afed1d7d..6d92d39a 100644
--- a/phpstan.neon.dist
+++ b/phpstan.neon.dist
@@ -22,3 +22,109 @@ parameters:
     ignoreErrors:
         - '#Call to method .+ with .+ will always evaluate to true.#'
         - '#Cannot call method (assertExitCode|expectsOutput|expectsOutputToContain|assertExitCode)\(\) on Illuminate\\Testing\\PendingCommand\|int\.#'
+        # Ignore "will always evaluate to false" assertions in tests
+        -
+            message: '#Call to method PHPUnit\\Framework\\Assert::assertInstanceOf\(\) with .+ will always evaluate to false.#'
+            path: tests/
+        -
+            message: '#Call to method PHPUnit\\Framework\\Assert::assertArrayHasKey\(\) with .+ will always evaluate to false.#'
+            path: tests/
+        # Ignore class-string issues in tests with ReflectionClass
+        -
+            message: '#Parameter \#1 \$objectOrClass of class ReflectionClass constructor expects class-string<T of object>\|T of object, string given.#'
+            path: tests/
+        # Ignore mixed return type issues in tests
+        -
+            message: '#Method .+::getFacadeAccessor\(\) should return string but returns mixed.#'
+            path: tests/
+        # Ignore offset issues in test assertions where we're testing dynamic data
+        -
+            message: '#Offset .+ does not exist on array\{.+\}\.#'
+            path: tests/
+        # Ignore method return type issues in test fixtures
+        -
+            message: '#Method class@anonymous.+::getFactory\(\) should return class-string.+#'
+            path: tests/
+        # Ignore missing value type in iterable issues in test fixtures
+        -
+            message: '#return type has no value type specified in iterable type array\.#'
+            path: tests/
+        -
+            message: '#has parameter .+ with no value type specified in iterable type array.#'
+            path: tests/
+        # Ignore undefined method issues in trait test helpers
+        -
+            message: '#Call to an undefined method object::.+#'
+            path: tests/
+        # Ignore parameter type issues in tests where we test edge cases
+        -
+            message: '#Parameter \#\d+ .+ expects .+, .+ given\.#'
+            path: tests/Laravel/Facade/
+        -
+            message: '#Parameter \#\d+ .+ expects .+, .+ given\.#'
+            path: tests/Noty/Prime/
+        -
+            message: '#Parameter \#\d+ .+ expects .+, .+ given\.#'
+            path: tests/Toastr/Prime/
+        # Ignore call to undefined static method in tests (testing facade methods)
+        -
+            message: '#Call to an undefined static method .+#'
+            path: tests/Laravel/Facade/
+        # Ignore offset issues in CSP tests
+        -
+            message: '#Offset mixed on array\{\}.+#'
+            path: tests/Prime/Http/Csp/
+        # Ignore method never returns issues in anonymous class mocks
+        -
+            message: '#Method class@anonymous.+never returns string so it can be removed from the return type\.#'
+            path: tests/
+        # Ignore cannot call method on null in tests
+        -
+            message: '#Cannot call method .+ on .+\|null\.#'
+            path: tests/
+        # Ignore issues with assertArrayHasKey in tests
+        -
+            message: '#Parameter \#2 \$(haystack|array) of method PHPUnit\\Framework\\Assert::.+ expects .+, mixed given\.#'
+            path: tests/
+        # Ignore json_decode issues in tests
+        -
+            message: '#Parameter \#1 \$json of function json_decode expects string, string\|false given\.#'
+            path: tests/
+        # Ignore Mockery-related issues in tests
+        -
+            message: '#Call to an undefined method Mockery\\ExpectationInterface.+#'
+            path: tests/
+        # Ignore VarDumper/Data accessor issues in Symfony profiler tests
+        -
+            message: '#Cannot call method getValue\(\) on array.+#'
+            path: tests/Symfony/Profiler/
+        -
+            message: '#Cannot access offset .+ on array.+#'
+            path: tests/Symfony/Profiler/
+        -
+            message: '#Cannot access offset .+ on mixed\.#'
+            path: tests/
+        # Ignore mixed parameter in assertions
+        -
+            message: '#Parameter \#\d+ .+ of method PHPUnit\\Framework\\Assert::.+ expects .+, mixed given\.#'
+            path: tests/
+        # Ignore property value type not specified in tests
+        -
+            message: '#Property .+ type has no value type specified in iterable type array\.#'
+            path: tests/
+        # Ignore "will always evaluate" issues in tests
+        -
+            message: '#Call to method PHPUnit\\Framework\\Assert::.+ with .+ will always evaluate to .+#'
+            path: tests/
+        # Ignore assertArrayHasKey with VarDumper types
+        -
+            message: '#Parameter \#2 \$array of method PHPUnit\\Framework\\Assert::assertArrayHasKey\(\) expects array\|ArrayAccess.+#'
+            path: tests/Symfony/Profiler/
+        # Ignore array_keys parameter with VarDumper types
+        -
+            message: '#Parameter \#1 \$array of function array_keys expects array.+#'
+            path: tests/Symfony/Profiler/
+        # Ignore config parameter type issues in tests
+        -
+            message: '#Parameter \#2 \$config of class Flasher\\Symfony\\Profiler\\FlasherDataCollector constructor expects.+#'
+            path: tests/Symfony/Profiler/
diff --git a/src/Prime/Response/Presenter/HtmlPresenter.php b/src/Prime/Response/Presenter/HtmlPresenter.php
index 7d509b9e..fd630f4b 100644
--- a/src/Prime/Response/Presenter/HtmlPresenter.php
+++ b/src/Prime/Response/Presenter/HtmlPresenter.php
@@ -43,7 +43,7 @@ final class HtmlPresenter implements PresenterInterface
 
         $mainScript = $response->getMainScript();
         // Escape mainScript for JavaScript string context (prevent XSS)
-        $escapedMainScript = json_encode($mainScript ?? '', \JSON_THROW_ON_ERROR);
+        $escapedMainScript = json_encode($mainScript, \JSON_THROW_ON_ERROR);
         $replaceMe = self::FLASHER_REPLACE_ME;
         // Escape nonce for HTML attribute context (prevent XSS)
         $escapedNonceHtml = $nonce ? htmlspecialchars($nonce, \ENT_QUOTES | \ENT_HTML5, 'UTF-8') : '';