chore(vendor): import pi 1.3.0

Imported as a linear vendor commit so forge rebases do not replay the upstream root tree.

git-subtree-dir: third_party/pi

git-subtree-split: 71023aec1546d6d677a65669c5665c0927ce0dd0

third_party/pi/packages/tui/test/fixtures/clipboard-worker-test.c

@@ -0,0 +1,64 @@
+#include <assert.h>
+#include <stdatomic.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+static atomic_int allocations, reads;
+static atomic_bool released;
+
+static void* tracked_calloc(size_t count, size_t size) {
+    void* pointer = calloc(count, size);
+    if (pointer) atomic_fetch_add(&allocations, 1);
+    return pointer;
+}
+
+static void tracked_free(void* pointer) {
+    if (pointer) atomic_fetch_sub(&allocations, 1);
+    free(pointer);
+}
+
+#define calloc tracked_calloc
+#define free tracked_free
+#include "../../native/linux/src/clipboard-worker.h"
+#undef calloc
+#undef free
+
+// Exercise the production executor with a controlled blocking callback, without X11.
+static void read_clipboard(clipboard_job* job) {
+    job->data = tracked_calloc(5, 1);
+    assert(job->data);
+    memcpy(job->data, "text", 4);
+    job->length = 4;
+    job->format = job->operation == CLIPBOARD_IMAGE ? CLIPBOARD_BUFFER : CLIPBOARD_UTF8;
+    atomic_fetch_add(&reads, 1);
+    while (!atomic_load(&released)) {
+        struct timespec delay = {.tv_nsec = 1000000};
+        nanosleep(&delay, 0);
+    }
+}
+
+static napi_value release_reader(napi_env env, napi_callback_info info) {
+    (void)info;
+    atomic_store(&released, true);
+    return undefined_value(env);
+}
+
+static napi_value get_state(napi_env env, napi_callback_info info) {
+    (void)info;
+    char state[80];
+    pthread_mutex_lock(&worker_mutex);
+    snprintf(state, sizeof(state), "%d,%d,%d", atomic_load(&reads), atomic_load(&allocations), worker_busy);
+    pthread_mutex_unlock(&worker_mutex);
+    napi_create_string_utf8_fn create_string = (napi_create_string_utf8_fn)node_symbol("napi_create_string_utf8");
+    napi_value result = 0;
+    create_string(env, state, NAPI_AUTO_LENGTH, &result);
+    return result;
+}
+
+PI_NAPI_EXPORT napi_value napi_register_module_v1(napi_env env, napi_value exports) {
+    set_function_export(env, exports, "getText", get_clipboard_text);
+    set_function_export(env, exports, "getImage", get_clipboard_image);
+    set_function_export(env, exports, "release", release_reader);
+    set_function_export(env, exports, "state", get_state);
+    return exports;
+}