The markdown and decision sidebar readers gain a shared action bar. A new
lib/builtin/shared/reader_chrome.dart provides ReaderHistory (browser-style
back/forward stack — push truncates forward), a ReaderHistoryMixin that also
holds a single pin slot, and a ReaderActionBar widget. Both readers push to
history only on external selection; back/forward and jump-to-pin reload
in-place without re-publishing a selection (no bus churn / no decision-tab
re-trigger). The edit pencil opens the current doc in the editor
(editor.open) — the markdown path, or the decision's file_path.
T-189, T-190, T-191.
Co-Authored-By: Claude <noreply@anthropic.com>
Wave A's widget tests pulled previously-untested files into the coverage
denominator (the decision extension loads decisions_view; the file-tree
tests load file_tree_controller), dropping total coverage to 93.6%. Add
tests for DecisionsView (list render + tap-to-select, the T-188 publisher
side), FileTreeController, and the remaining DecisionDetailView branches,
restoring the total to 95.03%.
Co-Authored-By: Claude <noreply@anthropic.com>
The decisions extension tore down and re-contributed the decisions.detail
context-panel tab on every selection, racing the view's own subscription and
leaving the panel unrevealed — so clicking a decision often did nothing. Match
the working ticket panel: contribute the tab once (static), and on selection
just reveal the context panel and activateTab; DecisionDetailView loads via its
existing subscription.
T-188.
Co-Authored-By: Claude <noreply@anthropic.com>
jpmschweitzerandClaude