Remember power preerence and force fallback

Cargo.lock

@@ -232,6 +232,9 @@ name = "arrayvec"
 version = "0.7.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d3fb67a6e08acf24fdeccbac2cb6ac4305825bd1f117462e0e6f2f193345ad56"
+dependencies = [
+ "serde",
+]
 
 [[package]]
 name = "as-raw-xcb-connection"
@@ -1571,6 +1574,8 @@ dependencies = [
  "allocator-api2",
  "equivalent",
  "foldhash 0.2.0",
+ "serde",
+ "serde_core",
 ]
 
 [[package]]
@@ -2238,6 +2243,22 @@ dependencies = [
  "zerocopy-derive",
 ]
 
+[[package]]
+name = "macro_rules_attribute"
+version = "0.2.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b3ae8f6d608c795738406608304d30a2dfbdc8e58e44f7ba43236da5208ded3c"
+dependencies = [
+ "macro_rules_attribute-proc_macro",
+ "pastey",
+]
+
+[[package]]
+name = "macro_rules_attribute-proc_macro"
+version = "0.2.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fc04a4c58212d57930a24bf47d3fa87485264a3a054e9c10e042eb373573ad3c"
+
 [[package]]
 name = "matchers"
 version = "0.2.0"
@@ -2999,6 +3020,12 @@ dependencies = [
  "windows-link",
 ]
 
+[[package]]
+name = "pastey"
+version = "0.2.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2ee67f1008b1ba2321834326597b8e186293b049a023cdef258527550b9935b4"
+
 [[package]]
 name = "pdb-addr2line"
 version = "0.11.2"
@@ -5094,6 +5121,7 @@ dependencies = [
  "hashbrown 0.16.1",
  "indexmap",
  "log",
+ "macro_rules_attribute",
  "naga",
  "once_cell",
  "parking_lot",
@@ -5101,6 +5129,7 @@ dependencies = [
  "profiling",
  "raw-window-handle",
  "rustc-hash 1.1.0",
+ "serde",
  "smallvec",
  "thiserror 2.0.18",
  "wgpu-core-deps-apple",
@@ -5223,6 +5252,7 @@ dependencies = [
  "js-sys",
  "log",
  "raw-window-handle",
+ "serde",
  "web-sys",
 ]