Close canvas workspace detail parity gaps

[coneilen]

Summary

• enrich Windows graph canvas loop cards with metric pass/change, elapsed age, backend/model, branch, token usage, and reason-specific NEEDS YOU actions
• add attention rail age text and retain metric samples for workspace sparklines
• preserve accurate fired N labels for ordinary edges and document guarded retry/cycle wording as blocked until the Windows model decodes cycleGuard
• add terminal workspace right-panel sparkline/start/usage/collapse UIA children plus live-gate assertions for right-panel controls and mounted tab preservation
• update the parity ledger honestly, leaving live/protocol-limited gaps Partial instead of over-marking Validated

Validation

• zig fmt on touched Zig files
• git diff --check
• targeted Zig tests were attempted locally but blocked by the known environment mismatch: local Zig is 0.16.0 while the repo is pinned to 0.15.2, plus local Windows libc/header issues. CI should be treated as the authoritative build/live UIA gate.

RED: zig build test on initial commit f9fa7c0 -> GraphCanvas.test.edge presentation distinguishes kind condition and fired state failed because ordinary fire_count edges rendered retry ×2 instead of expected fired 2
GREEN: zig fmt graphcode-windows\src\GraphCanvas.zig after commit fc6ad1b -> exits 0 after restoring fired N for ordinary edges so the focused assertion matches the implementation
REGRESSION: git diff --check -> exits 0; the ledger records macOS retry ×N requires the currently undecoded cycleGuard field, preventing guarded-cycle wording from being applied to ordinary edges

Signed-off-by: Colin Neilens coneilen@microsoft.com
Co-authored-by: Copilot App 223556219+Copilot@users.noreply.github.com