fix(acl): preserve Number::Int on serde_json round-trip (#15481)

* fix(acl): preserve Number::Int on serde_json round-trip

From<serde_json::Value> for Value was checking as_f64() first, which
succeeds for any integer that fits in an f64, causing all integer values
to be silently coerced to Number::Float on deserialization.

Fix the check order to prefer as_i64() first, then as_u64() (falling
back to Float for values above i64::MAX to avoid silent wrapping), and
only using as_f64() for genuine floating-point numbers.

Fixes #15480

* fix(acl): preserve Number::Int on serde_json round-trip

From<serde_json::Value> for Value was checking as_f64() first, which
succeeds for any integer that fits in an f64, causing all integer values
to be silently coerced to Number::Float on deserialization.

Fix the check order to prefer as_i64() first, then as_u64() (cast to
i64, wrapping for values above i64::MAX), and only using as_f64() for
genuine floating-point numbers.

Fixes #15480

Author: thanhtoantnt

.changes/acl-number-int-preserved-on-serdejson-roundtrip.md

@@ -0,0 +1,7 @@
+---
+"tauri-utils": "patch:bug"
+---
+
+Fix `Number::Int` being silently coerced to `Number::Float` on `serde_json` round-trip.
+
+`From<serde_json::Value> for Value` was checking `as_f64()` first, which succeeds for every integer that fits in an f64, so integer JSON numbers were always deserialized as `Number::Float`. The check order is now `as_i64()` → `as_u64()` (cast to `i64`, wrapping for values above `i64::MAX`) → `as_f64()`, matching serde_json's own visitor convention.

crates/tauri-utils/src/acl/value.rs

@@ -86,12 +86,12 @@ impl From<serde_json::Value> for Value {
     match value {
       serde_json::Value::Null => Value::Null,
       serde_json::Value::Bool(b) => Value::Bool(b),
-      serde_json::Value::Number(n) => Value::Number(if let Some(f) = n.as_f64() {
+      serde_json::Value::Number(n) => Value::Number(if let Some(i) = n.as_i64() {
+        Number::Int(i)
+      } else if let Some(u) = n.as_u64() {
+        Number::Int(u as i64)
+      } else if let Some(f) = n.as_f64() {
         Number::Float(f)
-      } else if let Some(n) = n.as_u64() {
-        Number::Int(n as i64)
-      } else if let Some(n) = n.as_i64() {
-        Number::Int(n)
       } else {
         Number::Int(0)
       }),