Enforce LF line endings for Unix artifacts via .gitattributes

A shell script, .desktop, .rules, or .spec file checked out with CRLF (Windows
with core.autocrlf=true) breaks when run/parsed on Linux — a
`#!/usr/bin/env bash\r` shebang is a "bad interpreter" error, and the Linux
package would ship broken scripts. Pin these (and other text) to LF, and mark
binary assets (png/gz/traineddata) so they are never converted. Also harden
the packaging/wayland structural tests to strip CR defensively.

Co-Authored-By: Claude Fable 5 <[email protected]>

tests/unit/packaging-linux.test.js

@@ -6,7 +6,8 @@ const fs = require('node:fs');
 const path = require('node:path');
 
 const ROOT = path.resolve(__dirname, '..', '..');
-const read = (rel) => fs.readFileSync(path.join(ROOT, rel), 'utf8');
+// Strip CR so /^...$/m assertions are robust to CRLF checkouts on Windows CI.
+const read = (rel) => fs.readFileSync(path.join(ROOT, rel), 'utf8').replace(/\r\n/g, '\n');
 const exists = (rel) => fs.existsSync(path.join(ROOT, rel));
 
 // These are structural checks that run in the normal (cross-platform) unit

tests/unit/wayland-honesty.test.js

@@ -9,7 +9,8 @@ const { chooseCaptureTrigger, detectLinuxCapabilities } = require('../../app/pla
 const platform = require('../../app/platform');
 
 const ROOT = path.resolve(__dirname, '..', '..');
-const read = (rel) => fs.readFileSync(path.join(ROOT, rel), 'utf8');
+// Strip CR so assertions are robust to CRLF checkouts on Windows CI.
+const read = (rel) => fs.readFileSync(path.join(ROOT, rel), 'utf8').replace(/\r\n/g, '\n');
 const exists = (rel) => fs.existsSync(path.join(ROOT, rel));
 
 // ---- honest trigger decisions ----------------------------------------------