fix: preserve configured cwd during environment bootstrap snapshot

[spwuc]

Summary

• enter the configured cwd before capturing the shell bootstrap snapshot
• preserve literal ~ and ~/... paths while safely quoting other cwd values
• prevent login-shell startup defaults from overwriting the cwd supplied by ACP/terminal config

Testing

• inspected the targeted diff for tools/environments/base.py
• automated tests not run

[alt-glitch]

Likely duplicate of #9798 and #14831 — same root cause: init_session() captures shell snapshot before cd-ing into configured cwd. Multiple PRs exist for this fix.

[teknium1]

Thanks for the focused cwd-preservation patch. This behavior is already implemented on current main; this is an automated hermes-sweeper review.

• tools/environments/base.py:369 prepares the configured cwd with the backend-aware quoting helper, and tools/environments/base.py:422-424 changes into it before recording and emitting pwd -P.
• tests/tools/test_init_session_cwd_respect.py:38-148 covers the configured-cwd-wins contract, ordering before pwd -P, and paths with spaces.
• The equivalent all-backend fix merged through fix(terminal): restore configured cwd after login profile scripts (salvage #14796) #17205 as ac855bba0ed282ed6a1a94b8471689b2b6bf9fe4 (fix(terminal): restore configured cwd after login profile scripts (salvage #14796)), and is included in v2026.4.30.
• The member comment identifying fix: preserve configured cwd in local terminal snapshots #9798 and fix(terminal): honor configured cwd at session init #14831 as the same root cause is consistent with the landed fix.