refactor(test): move shell wrapper fixtures where they read as test data (#15363)

.gitattributes

@@ -18,3 +18,7 @@
 # source patch under xterm-src/ instead. The sibling patches stay diffable.
 /config/patches/@xterm__xterm@*.patch -diff
 /config/patches/xterm-src/*.patch text eol=lf
+# Generated wrapper fixtures: collapse them in the PR diff so they stop drowning
+# the reviewable change, and pin LF because they are compared byte-for-byte.
+# Not -diff: the shell diff is the review surface when a wrapper does change.
+/src/main/__tests__/shell-wrapper-snapshots/*.txt linguist-generated=true text eol=lf

src/main/__tests__/shell-wrapper-snapshots/README.md

@@ -0,0 +1,37 @@
+# Shell wrapper snapshots
+
+Generated test fixtures. **Do not edit by hand.**
+
+Each `.txt` here is the byte-exact content of one shell startup file Orca writes
+into a pane's wrapper `ZDOTDIR`, captured per transport:
+
+| | |
+| :--- | :--- |
+| `local-*` | local PTY |
+| `daemon-*` | daemon / SSH host |
+| `relay-*` | relay overlay |
+
+Owned by [`../../shell-wrapper-generated-file-snapshot.test.ts`](../../shell-wrapper-generated-file-snapshot.test.ts),
+which drives the real wrapper entry points, reads the files back off disk and
+compares them here. The temp wrapper root is normalized to `<WRAPPER_ROOT>` —
+the only path-dependent bytes in the output.
+
+## Why these exist
+
+The three zsh generators were once copy-pasted and drifted, so a fix landed in
+one transport and silently missed the other two. These pin all three at once, so
+drift shows up as a reviewable shell diff instead of hiding in a TypeScript
+template literal.
+
+## Regenerating
+
+Run the test and review the resulting diff:
+
+```sh
+npx vitest run --config config/vitest.config.ts src/main/shell-wrapper-generated-file-snapshot.test.ts
+```
+
+⚠️ `toMatchFileSnapshot` **rewrites these files on mismatch when run locally** —
+only CI fails. So a passing local run proves nothing on its own: always
+`git diff` this directory afterwards, and treat any change as a real behavior
+change to what users' shells execute until you have explained it.

src/main/shell-wrapper-generated-file-snapshot.test.ts

@@ -4,6 +4,9 @@
  *
  * Why: the zsh generators were unified behind one builder; these fixtures were
  * captured from the pre-unification code so any drift shows up as a diff.
+ *
+ * Fixtures live in ./__tests__/shell-wrapper-snapshots/ — see the README there
+ * before accepting a rewrite; a local run updates them silently.
  */
 import { mkdtempSync, readFileSync, rmSync } from 'node:fs'
 import { tmpdir } from 'node:os'
@@ -33,7 +36,7 @@ const WRAPPER_FILES = [
   ['bash-rcfile', join('bash', 'rcfile')]
 ] as const
 
-const SNAPSHOT_DIR = join(__dirname, 'shell-wrapper-snapshots')
+const SNAPSHOT_DIR = join(__dirname, '__tests__', 'shell-wrapper-snapshots')
 
 // Why: the wrapper root is a temp dir per run, and the baked ZDOTDIR literal is
 // the only path-dependent byte in the output; pin it to a stable placeholder.