C-1: pending-session ownership in WasmTool (registered before adoption,
destroyed on every non-adoption exit incl. unmount/late-handoff guards);
sheet-manager destroyed flag refuses post-destroy connects.
C-2: attachKicadCollab destroys a partially-attached binding on seed throw.
C-3: connectKicadDoc gains a 30s whole-path deadline + abort signal covering
provider import/construction/initial sync, with partial cleanup on every
loss path (incl. late-resolving construction).
C-4: sheet switch clears host presence/comments/follow/drift callbacks
BEFORE the new room connects (onActiveChange(null) pre-connect).
C-5: switchTo rethrows SexprVersionError terminally (no retry timer, queue
unpoisoned); boot surfaces it, nav hook degrades per-sheet.
C-6: sibling-restage failed dial retries on 1s→30s backoff instead of
latching forever; roster churn still never re-dials.
C-7: terminal-error promote() now tears down every ws-driven collab ingress
(shared teardownCollab) — no ticket storm under the fatal overlay; UP apply
observer gains the symmetric try/catch + clean-stack re-surface.
Tests: index.test.ts (new, 8), sheet-manager +3, sibling-restage +2;
standalone units 135/135, tsc clean; ysync-two-tab + eeschema-subschema
7/7 kicad-chromium on the rebuilt bundle.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01UZJ1pUePb4W47hGoLMYTw4
7d500a5f9e