chore: add CHANGELOG entries for question marker and scratchpad fixes

Author: elkaix

CHANGELOG.md

@@ -15,6 +15,10 @@ GitHub Releases page; `0.8.0` is the new starting line.
 
 ## Unreleased
 
+- **❓ question marker standardized across all question surfaces.** A new `QUESTION_MARKER` constant in `glyphs.py` replaces the inconsistent mix of `●` (inline transcript) and `?` (interactive panel, pager, prompt) with a single `❓` glyph (ASCII fallback: `?`) used everywhere.
+- **Scratchpad isolated to current session; cleans up on interruption.** Agents no longer fast-skim all prior sessions' scratch files on startup, eliminating the post-interrupt confusion where stale planning from previous sessions was injected into a new session's context. Scratch files are now deleted on every session exit — success or interruption — so files no longer accumulate.
+- **`SetTodoList` gated behind explicit plan approval.** The tool description and agent system prompt now require that todos are set only after the user agrees on the plan. During planning and exploration the tool must not be called; once set, the list is the single source of truth for execution with status-only updates.
+
 ## 0.32.0 (2026-06-03)
 
 ### What changed in this release