fix(closet_llm): replace non-ASCII symbols in progress output (#1034)

[arnoldwender]

What and Why

closet_llm.py prints ✓, ✗, and — (U+2713, U+2717, U+2014) during mempalace closets regen. These characters cannot be encoded in GBK (Windows PowerShell/CMD default), causing UnicodeEncodeError on the same code path fixed in miner.py via #681.

cli.py has the same problem on the sweep error path (✗).

Root Cause

• closet_llm.py:244 — — in dry-run banner
• closet_llm.py:266 — ✗ + — in LLM-failed message
• closet_llm.py:303 — ✓ + — in success message
• cli.py:187 — ✗ in sweep error message

Change Summary

Replace non-ASCII symbols with ASCII equivalents: [OK], [FAIL], [!], and -.

Test Plan

• All 1066 existing tests pass
• ruff check clean

Closes #1034

[arnoldwender]

Rebased on latest develop. The cli.py hunk was dropped — develop already has the equivalent fix (using ERROR: instead of [!], which reads better). The closet_llm.py hunk is preserved, no logical changes.

[arnoldwender]

Friendly ping — this one's been quiet for a week. CI is green across all 6 checks (linux 3.9/3.11/3.13, windows, macos, lint), branch is merge-clean, last activity was the rebase on 2026-04-23. Happy to adjust anything if you'd like changes.

[arnoldwender]

Second ping after a week. CI is green across all 6 checks (linux 3.9/3.11/3.13, windows, macos, lint), branch is merge-clean, no merge conflicts despite 100+ commits landing on develop since.

@igorls — looping you in given you've been active on the encoding cluster (#1214/#1215 merged yesterday, #1373/#1371 follow-ups in flight as #1408/#1409 today). This one is the narrow closet_llm.py slice; #1104 is the broader sweep that closes #1034. Happy to fold this into #1104 and close #1100 if that's cleaner, or rework either approach if a different direction would land better.

[arnoldwender]

Friendly ping — CI is green across all platforms (Linux 3.9/3.11/3.13, macOS, Windows). #1100, #1102, #1104 are all small encoding fixes for #1034 if you want to batch them next time you're sweeping that area. Happy to rebase any of them if there's drift.

[arnoldwender]

Rebased on upstream/develop (latest 1247e17, post-3.3.5 release). No logical changes — conflict-free rebase, only commit replay onto current develop. CI green pre-rebase; awaiting fresh CI run.

[arnoldwender]

Friendly ping — post-3.3.6 release this is still mergeable on upstream/develop @ f5ea021 (CI green, no conflicts). Happy to adjust anything if it would help land it.