#473 docs: remove stale shipped-feature promises

[Anonymous]

Originally created by: slegarraga

Closes [#426]

What

• Removes the four stale "(a later slice)" promises for features that already shipped: Codex hook installation, Claude Code wiring, PostToolUse scanning, and doctor version checks.
• Also removes the fifth match found by the issue's repository-wide search in the dashboard comment, where the inline page already exists.
• Keeps each sentence focused on current behavior; no code paths change.

Verification

• rg "later slice" src/ — no matches.
• .venv/bin/ruff format --check .
• .venv/bin/ruff check .
• .venv/bin/pytest tests/unit/test_cli_help.py — 51 passed.

[Anonymous]

Ticket changed by: fu351

• status: open --> closed

[Anonymous]

Ticket changed by: fu351

• status: closed --> open

[Anonymous]

Ticket changed by: fu351

• status: open --> closed

[Anonymous]

Originally posted by: fu351

Merged, thanks @slegarraga! Good call taking the fifth match in dash/app.py too, the issue only listed four, and the docstring rewrap kept every sentence saying what the code does today.