[Bug] File autocompletion fails for relative paths with `@` operator

Bug Description
new @ file resolution fails. I've got a file Documents/test_patterns.md and when I type @../Documents/t nothing shows up (even though that path does resolve correctly)

Environment Info

• Platform: darwin
• Terminal: iTerm.app
• Version: 2.1.47
• Feedback ID: 5c34344a-ad40-43aa-8fdd-9184846b75a1

Errors

[{"error":"Error: ENOENT: no such file or directory, open '/Users/jkaster/.claude/remote-settings.json'\n    at openSync (unknown)\n    at readSync (/$bunfs/root/claude:12:1441)\n    at K2 (/$bunfs/root/claude:6132:113)\n    at k5 (/$bunfs/root/claude:6134:226)\n    at r9A (/$bunfs/root/claude:178:8371)\n    at O8R (/$bunfs/root/claude:178:8534)\n    at zN0 (/$bunfs/root/claude:179:1234)\n    at dAT (/$bunfs/root/claude:179:2112)\n    at yB (/$bunfs/root/claude:179:2039)\n    at it9 (/$bunfs/root/claude:433:3291)","timestamp":"2026-02-19T00:08:57.852Z"},{"error":"Error: ENOENT: no such file or directory, open '/Users/jkaster/.claude/remote-settings.json'\n    at openSync (unknown)\n    at readSync (/$bunfs/root/claude:12:1441)\n    at K2 (/$bunfs/root/claude:6132:113)\n    at k5 (/$bunfs/root/claude:6134:226)\n    at r9A (/$bunfs/root/claude:178:8371)\n    at tZA (/$bunfs/root/claude:2166:20976)\n    at l1B (/$bunfs/root/claude:2166:21881)\n    at <anonymous> (/$bunfs/root/claude:11417:510)\n    at <anonymous> (/$bunfs/root/claude:6165:1974)\n    at forEach (native:1:11)","timestamp":"2026-02-19T00:08:57.881Z"},{"error":"Error: ENOENT: no such file or directory, open '/Users/jkaster/.claude/remote-settings.json'\n    at openSync (unknown)\n    at readSync (/$bunfs/root/claude:12:1441)\n    at K2 (/$bunfs/root/claude:6132:113)\n    at k5 (/$bunfs/root/claude:6134:226)\n    at r9A (/$bunfs/root/claude:178:8371)\n    at O8R (/$bunfs/root/claude:178:8534)\n    at q_ (/$bunfs/root/claude:178:10927)\n    at VVT (/$bunfs/root/claude:319:1160)\n    at W$R (/$bunfs/root/claude:319:1655)\n    at xsB (/$bunfs/root/claude:5817:18670)","timestamp":"2026-02-19T00:08:57.882Z"},{"error":"Error: ENOENT: no such file or directory, open '/Users/jkaster/.claude/remote-settings.json'\n    at openSync (unknown)\n    at readSync (/$bunfs/root/claude:12:1441)\n    at K2 (/$bunfs/root/claude:6132:113)\n    at k5 (/$bunfs/root/claude:6134:226)\n    at r9A (/$bunfs/root/claude:178:8371)\n    at O8R (/$bunfs/root/claude:178:8534)\n    at q_ (/$bunfs/root/claude:178:10927)\n    at zVT (/$bunfs/root/claude:319:1765)\n    at W$R (/$bunfs/root/claude:319:1727)\n    at xsB (/$bunfs/root/claude:5817:18670)","timestamp":"2026-02-19T00:08:57.883Z"},{"error":"Error: ENOENT: no such file or directory, open '/Users/jkaster/.claude/remote-settings.json'\n    at openSync (unknown)\n    at readSync (/$bunfs/root/claude:12:1441)\n    at K2 (/$bunfs/root/claude:6132:113)\n    at k5 (/$bunfs/root/claude:6134:226)\n    at r9A (/$bunfs/root/claude:178:8371)\n    at O8R (/$bunfs/root/claude:178:8534)\n    at q_ (/$bunfs/root/claude:178:10927)\n    at I1A (/$bunfs/root/claude:803:54273)\n    at f1A (/$bunfs/root/claude:803:54766)\n    at WF8 (/$bunfs/root/claude:11034:4345)\n    at async <anonymous> (/$bunfs/root/claude:11442:2312)","timestamp":"2026-02-19T00:08:57.889Z"},{"error":"Error: ENOENT: no such file or directory, open '/Users/jkaster/.claude/remote-settings.json'\n    at openSync (unknown)\n    at readSync (/$bunfs/root/claude:12:1441)\n    at K2 (/$bunfs/root/claude:6132:113)\n    at k5 (/$bunfs/root/claude:6134:226)\n    at r9A (/$bunfs/root/claude:178:8371)\n    at O8R (/$bunfs/root/claude:178:8534)\n    at q_ (/$bunfs/root/claude:178:10927)\n    at JC7 (/$bunfs/root/claude:1447:2032)\n    at xMT (/$bunfs/root/claude:1447:4021)\n    at G0T (/$bunfs/root/claude:1447:4096)\n    at async <anonymous> (/$bunfs/root/claude:1851:16246)\n    at async <anonymous> (/$bunfs/root/claude:1490:2480)","timestamp":"2026-02-19T00:08:57.902Z"},{"error":"Error: ENOENT: no such file or directory, open '/Users/jkaster/.claude/remote-settings.json'\n    at openSync (unknown)\n    at readSync (/$bunfs/root/claude:12:1441)\n    at K2 (/$bunfs/root/claude:6132:113)\n    at k5 (/$bunfs/root/claude:6134:226)\n    at r9A (/$bunfs/root/claude:178:8371)\n    at O8R (/$bunfs/root/claude:178:8534)\n    at q_ (/$bunfs/root/claude:178:10927)\n    at O0T (/$bunfs/root/claude:1447:1914)\n    at G0T (/$bunfs/root/claude:1447:4118)\n    at <anonymous> (/$bunfs/root/claude:1851:6315)\n    at async <anonymous> (/$bunfs/root/claude:1851:16246)\n    at async <anonymo…

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