Preserve editor input context through diagram help

harness/compact-context-help-20260925.md

@@ -7,7 +7,7 @@ This record does not accept the complete first release or the other diagram defe
 
 The user's screenshot showed two permanent Traceability explanation paragraphs and a separate generic gesture-hint row. Direct Windows inspection of the released water-pressure example reproduced these. At a 1100×700 client size (1102×732 captured window), the Traceability canvas began around window y=470 and ended around y=692, leaving about 220 pixels for modeling. At the normal 1440×900 client size its top was around y=417. The release was opened from the existing downloaded package; only an in-memory projection switch was made and Undo restored the clean model before closure.
 
-The candidate moves general instructions into contextual Help, reusing the offline guide. Architecture, State and Process selection bars use a stable compact row; allocation destination and Arrange controls share a row. Traceability retains its displayed-line count and existing actions. Active drawing/assignment feedback appears beside the operation outcome in the persistent status bar, with full text on hover. Operation errors must never be replaced by generic guidance.
+The candidate moves general instructions into contextual Help, reusing the offline guide. Architecture, State and Process selection bars use a stable compact row. Allocation retains its full-width destination slot; a concise Arrange control sits beside the existing view-content and Help controls. Traceability retains its displayed-line count and existing actions. Active drawing/assignment feedback appears beside the operation outcome in the persistent status bar, with full text on hover. Operation errors must never be replaced by generic guidance.
 
 Help opens as an overlay and closes with Close or Escape. F1 opens the relevant diagram topic. The workspace, selected group, pending source/property/behavior drafts and camera remain owned by their existing state. Background user commands are rejected before specialized canvas/reference dispatch. Passive results retain their established validity checks. The editor remains the first child of a stable Stack while Help opens and closes.
 
@@ -17,6 +17,12 @@ Rejected alternatives: ordinary navigation to the Guide page cleared selection a
 
 ## Verification status
 
-Implementation and seven focused state/admission regression tests are prepared. The [independent source review](compact-context-help-source-review-20260925.md) records the corrected findings, including passive viewport updates while Help is open. First intermediate `cargo check -p oa-desktop --locked` passed before later overlay and input changes; it is not a check of the final candidate. Current build, focused tests, strict lint, formatting, native comparison and fresh final review remain pending. Baseline captures and raw build logs are local-only until the evidence publication step. No new executable, integrated change, issue closure or release is claimed.
+Clean source `f83068757af885572f6b3f932d07233dd1b94b7e` passed `cargo build -p oa-desktop --locked` on Windows gnullvm. Its candidate executable SHA-256 is `c1a9b196ec03e86f049fa2aadb2b86bfcaa3f0fbae582a80ee39ee8adf0758e3e`. The [independent source review](compact-context-help-source-review-20260925.md) records the corrected source findings, including passive viewport updates while Help is open.
+
+Independent native review of that executable recovered approximately 61 pixels in normal Traceability, 114 pixels in minimum Traceability and 58 pixels in minimum Allocation. Help resizes, pointer-scrolls, selects the State topic, and closes through Close/Escape. The review also reproduced two acceptance failures: PageDown cannot scroll Help, and F1/Escape preserves a property or Process-creation draft but loses typing focus/caret continuation. These findings require correction and another native check; model-state unit tests alone do not cover internal widget focus. The idle State-canvas gesture sentence is also removed in the successor; active/pending and hovered-item feedback retain their stable slot.
+
+The initial focused test run passed nine and failed one: the allocation test fixture used the default Overview projection before asserting allocation ownership. A separate ten-case mounted geometry run passed nine and failed the destination's existing 400-pixel minimum-width check. Sharing its row with the verbose Arrange action reduced that slot to 328 pixels at minimum size. The successor fixes the fixture explicitly and restores the full destination row without weakening its width check. The original failed logs are preserved in the [native/test evidence](experiments/compact-help-20260925/README.md). These diagnostic runs began before the successor edits and are not frozen-source acceptance of those edits.
+
+The successor adds mounted keyboard/article-scroll, exact-caret, IME isolation, modifier-release and interrupted-pointer checks. Full desktop tests, strict lint, formatting, corrected native workflows and fresh final review remain pending. Evidence is branch-local until its publication step. No new executable publication, integrated change, issue closure or release is claimed.
 
 Required native checks: minimum and normal windows; Traceability and Allocation space comparison; multi-selection with long names; Help/F1/Close/Escape with property and behavior drafts; editor focus and canvas scroll/camera restoration; active feedback plus operation failure; State and Process controls; subsequent edit/Undo/Redo and source preservation. Linux remains deferred under the recorded user instruction.