fix(3597): windows parity batch — sdk/install/hook/worktree clusters (21 files)

Three parallel diagnostic agents (G: sdk/install path-sep, H: hook scripts,
I: worktree/workspace) characterised the remaining windows-22 failures on
23b52f1a. Patches by class:

CRLF in test parsers / file-content reads
  - bug-2136-sh-hook-version: shebang check split('\n') → split(/\r?\n/)
  - bug-3542-executor-git-stash-prohibition: strip \r from read content
    (git rewrites stashed text with CRLF on win autocrlf=true checkout)
  - workspace: BOM-strip + explicit \r strip in parseCommandFile (BOM at
    byte 0 defeats /^---/ anchor → fmMatch null → fm.name undefined)

Windows path-separator / 8.3-shortname normalization
  - bug-3491-nested-git-worktree: use fs.realpathSync.native to expand
    %TEMP% RUNNER~1 → runneradmin; normalize sep before path-equality
  - prune-orphaned-worktrees: normalize \\→/ before substring includes
    (git emits forward-slash in --porcelain on Windows even when
    path.join produced backslashes)
  - bug-3017-codex-hook-absolute-node: accept POSIX path OR path with
    drive-letter prefix in hookPath equality assertion
  - bug-3126-global-skills-base-runtime-path: use path.join for expected
    /xdg/<runtime> values (production calls path.join → \xdg\… on win32)

Test under-specified platform / forgot win32 env
  - bug-2979-hook-absolute-node: pass {platform:'linux'} to
    buildHookCommand + rewriteLegacyManagedNodeHookCommands so the
    POSIX-branch tests don't pick up the #3393 GitBash code path
  - bug-3288-model-catalog + bug-3571-config-manifest: also set
    USERPROFILE alongside HOME so os.homedir() on win32 redirects to
    the test fixture instead of the runner's real ~

External-cmd resolution
  - bug-2647-outer-tarball-sdk-dist: use npm.cmd + {shell:true} on win32
    so execFileSync resolves PATHEXT (literal `npm` is ENOENT)

ESM loader: tests/runtime-bridge-sync-smoke.test.cjs already migrated to
pathToFileURL in 23b52f1a (cluster E).

Explicit per-test/describe skip on win32 (with required string reasons
to satisfy no-unconditional-win32-skip guard)
  - feat-3347-graphify-auto-update-hook: 3 describes — harness spawns
    bash/kill/sleep + the hook itself is bash
  - feat-3595-fs-fault-injection: move \t and \n filenames into the
    POSIX-only branch (NTFS forbids 0x00–0x1F in filenames)
  - bug-2775/2829/3033/3231/3359: POSIX shim under ~/.local/bin with
    chmod 0o755 — not how Windows install works
  - bug-3211: single subtest where cp.execSync reassignment isn't
    picked up on win32 (POSIX coverage via the mock; live windows
    behavior covered by 3211-D which keeps running)
  - install-path-detection: parses sh-style export PATH= rc files;
    Windows has no rc files (registry Path)
  - worktree-safety-policy: single test using POSIX /repo/wt fixture
    paths that can't be expressed under win32 path.resolve

Validated: plex2 (ubuntu docker) 11224/0 pass.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

tests/bug-2979-hook-absolute-node.test.cjs

@@ -153,7 +153,7 @@ describe('Bug #3362 / #3413: Windows hook commands are runtime-aware', () => {
 
 describe('Bug #2979: buildHookCommand for .sh hooks still uses bare "bash" (POSIX std PATH always has /bin)', () => {
   test('.sh hook runner is exactly "bash" — bash is in /usr/bin:/bin and resolves under minimal PATH', () => {
-    const cmd = buildHookCommand('/tmp/.claude', 'gsd-session-state.sh');
+    const cmd = buildHookCommand('/tmp/.claude', 'gsd-session-state.sh', { platform: 'linux' });
     const parsed = parseHookCommand(cmd);
     assert.equal(parsed.runner, 'bash');
   });
@@ -364,7 +364,7 @@ describe('Bug #2979 (#3002 CR): rewriteLegacyManagedNodeHookCommands rewrites ba
       },
     };
     const runner = '"/usr/local/bin/node"';
-    const changed = rewriteLegacyManagedNodeHookCommands(settings, runner);
+    const changed = rewriteLegacyManagedNodeHookCommands(settings, runner, { platform: 'linux' });
     assert.equal(changed, true);
     assert.equal(
       settings.hooks.SessionStart[0].hooks[0].command,
@@ -381,7 +381,7 @@ describe('Bug #2979 (#3002 CR): rewriteLegacyManagedNodeHookCommands rewrites ba
       },
     };
     const runner = '"/usr/local/bin/node"';
-    const changed = rewriteLegacyManagedNodeHookCommands(settings, runner);
+    const changed = rewriteLegacyManagedNodeHookCommands(settings, runner, { platform: 'linux' });
     assert.equal(changed, true);
     assert.equal(
       settings.hooks.SessionStart[0].hooks[0].command,