feat: add uninstall dry-run mode

[teknium1]

Summary

hermes uninstall --dry-run now prints the uninstall plan without stopping services or deleting files.

Ported the useful safety affordance from nanocoai/nanoclaw#2719: Hermes already has a mature uninstaller, but no no-op preview mode for operators to inspect scope before running it.

Changes

• hermes_cli/subcommands/uninstall.py: adds --dry-run
• hermes_cli/uninstall.py: prints a non-mutating plan for gateway cleanup, PATH cleanup, wrappers/symlinks, GUI artifacts, code checkout, and data removal/preservation
• tests/hermes_cli/test_uninstall_dry_run.py: verifies dry-run skips _perform_uninstall and the parser accepts the flag

Validation

Check	Result
python3 -m pytest tests/hermes_cli/test_uninstall_dry_run.py -q	2 passed
scripts/run_tests.sh tests/hermes_cli/test_uninstall_dry_run.py tests/hermes_cli/test_uninstall_node_symlinks.py tests/hermes_cli/test_gui_uninstall.py	27 passed

Source

• Inspired by feat: add uninstall.sh — per-copy uninstaller with confirmation, dry-run, and OneCLI agent cleanup nanocoai/nanoclaw#2719
• Adapted to Hermes by layering a preview path over the existing uninstaller instead of porting NanoClaw's separate shell uninstaller.

Infographic

[github-actions]

🔎 Lint report: nanoclaw-port/uninstall-dry-run vs origin/main

ruff

Total: 0 on HEAD, 0 on base (➖ 0)

🆕 New issues: none

✅ Fixed issues: none

Unchanged: 0 pre-existing issues carried over.

ty (type checker)

Total: 10904 on HEAD, 10902 on base (🆕 +2)

🆕 New issues (2):

Rule	Count
unresolved-attribute	2

First entries

tests/run_agent/test_credits_notices_toggle.py:76: [unresolved-attribute] unresolved-attribute: Unresolved attribute `_credits_session_start_micros` on type `AIAgent`
run_agent.py:2920: [unresolved-attribute] unresolved-attribute: Object of type `Self@get_credits_spent_micros` has no attribute `_credits_session_start_micros`

✅ Fixed issues (1):

Rule	Count
invalid-assignment	1

First entries

tests/run_agent/test_credits_notices_toggle.py:76: [invalid-assignment] invalid-assignment: Object of type `None` is not assignable to attribute `_credits_session_start_micros` of type `int`

Unchanged: 5733 pre-existing issues carried over.

Diagnostics are surfaced as warnings — this check never fails the build.

[teknium1]

Merged via salvage PR #60111 (branch here was ~3000 commits stale; commit 4e502ad cherry-picked onto current main with authorship preserved). Landed as 4916897.