G-128: re-vendor punkres 0.3.1 (platform-aware usage pin - linux CLI suite green)

Upstream f0af880 (f97eda2 + version-pin fixup): the first native linux test
run (WSL Ubuntu 24.04, zig 0.16.0, route-b of the e2e) surfaced the usage
pin's hardcoded punkres.exe argv0; the pin now splices EXENAME comptime and
the suite is green on BOTH platforms (windows 33/33 verified here from the
vendored tree; linux run recorded in the goal detail). bin/punkres.exe
rebuilt via the tool step (0.3.1).

Assisted-by: harness=claude; primary-model=claude-fable-5; api-location=anthropic.com

src/tools/punkres/PROVENANCE.md

@@ -8,8 +8,8 @@
   the punkshell repo root. That is a layout convention, not a requirement - if
   no checkout is present there, clone the remote to that location; the Vendored
   state commit below identifies the exact upstream state in any clone.
-- Vendored state: commit `dca8634f190d8e9e800637211d666951737909da` (punkres
-  v0.3.0, 2026-07-29; upstream working tree clean at copy time)
+- Vendored state: commit `f0af880e1a1e2f27897b71bd63aa27a80ba0355e` (punkres
+  v0.3.1, 2026-07-29; upstream working tree clean at copy time)
 - Vendored: 2026-07-29 for goal G-128 (see
   `goals/G-128-portable-pe-resource-stamping.md`)
 - Lineage: first-party punkshell tool, written 2026-07-29 for G-128 - no

src/tools/punkres/build.zig.zon

@@ -1,6 +1,6 @@
 .{
     .name = .punkres,
-    .version = "0.3.0",
+    .version = "0.3.1",
     .fingerprint = 0x663d2953305aee5d,
     .minimum_zig_version = "0.16.0",
     .paths = .{""},

src/tools/punkres/src/punkres.zig

@@ -40,10 +40,10 @@ var g_io: Io = undefined;
 //stdout with honestly-probed flags - set at entry (see stdout_file)
 var g_stdout: Io.File = undefined;
 
-pub const VERSION = "0.3.0";
+pub const VERSION = "0.3.1";
 
 pub const HEADER =
-    \\# PUNKRES 0.3.0 -- portable PE resource stamper (punkshell G-128)
+    \\# PUNKRES 0.3.1 -- portable PE resource stamper (punkshell G-128)
     \\
 ;
 

src/tools/punkres/src/punkres_test.zig

@@ -178,17 +178,17 @@ test "print usage" {
     var tmp = initTestDir();
     defer tmp.cleanup();
     const args = [_][]const u8{"nonsense"};
+    //argv0 renders platform-dependently (punkres.exe / punkres) - the pin
+    //splices EXENAME so the exact-output check holds on windows AND linux
     const output = mainres.HEADER ++
-        \\
-        \\Usage:
-        \\
-        \\  punkres.exe info [-porcelain] <pefile>
-        \\  punkres.exe list [-porcelain] <pefile>
-        \\  punkres.exe extract-ico [-group <id|name>] <pefile> <out.ico>
-        \\  punkres.exe set-icon [-o <outfile>] [-group <id|name>]
-        \\          [-allow-file-relative-shift] [-allow-opaque-overlay]
-        \\          [-drop-opaque-overlay] [-strip-signature] <pefile> <icon.ico>
-        \\  punkres.exe version
+        "\nUsage:\n\n" ++
+        "  " ++ EXENAME ++ " info [-porcelain] <pefile>\n" ++
+        "  " ++ EXENAME ++ " list [-porcelain] <pefile>\n" ++
+        "  " ++ EXENAME ++ " extract-ico [-group <id|name>] <pefile> <out.ico>\n" ++
+        "  " ++ EXENAME ++ " set-icon [-o <outfile>] [-group <id|name>]\n" ++
+        "          [-allow-file-relative-shift] [-allow-opaque-overlay]\n" ++
+        "          [-drop-opaque-overlay] [-strip-signature] <pefile> <icon.ico>\n" ++
+        "  " ++ EXENAME ++ " version\n" ++
         \\
         \\  set-icon replaces ALL RT_ICON/RT_GROUP_ICON resources with the images
         \\  of <icon.ico> (ids 1..N under the first pre-existing group's name and
@@ -210,7 +210,7 @@ test "version" {
     var tmp = initTestDir();
     defer tmp.cleanup();
     const args = [_][]const u8{"version"};
-    try expectExecute(&args, 0, "punkres 0.3.0\n", tmp);
+    try expectExecute(&args, 0, "punkres 0.3.1\n", tmp);
 }
 
 test "set-icon -group renames the group; later stamps adopt it (convergent)" {