* fix(plan-canvas): stop dropping list items when a block's first item is over-indented
* fix: address greptile findings for PR #2501 - list-type detection and outdent nesting
- plan-canvas markdown: fix nested list rendering where outdented runs (indent
6→4) create duplicate sibling UL blocks instead of sharing parent (#2501)
- transcript-context: add LARGE_WINDOW_NATIVE_MODEL_IDS array for models whose
default context window is 1M but do NOT carry the [1m] marker (fixes#2497)
- Add test coverage for transcript-context and shell-substitution modules
- Add test coverage for project-detect module (#2498)
* fix(plan-canvas): handle outdented list runs
* fix(plan-canvas): start a new list when marker type changes at the same indent
CommonMark treats a marker-type change (bullet to ordered or back) at
the same indentation as the start of a new list. buildList previously
absorbed the run into the current list, so mixed runs rendered under a
single wrong tag. Stop the run on a tag change and let buildListBlock
render the next run as a sibling list with its own tag.
