Memory keys can contain characters like [ ] / : . # and spaces that make
invalid HTML id values (breaks CSS selectors and ARIA id-ref lookups).
- Add sanitizeId() helper: replaces non-alphanumeric chars with hyphens,
collapses consecutive hyphens, strips leading/trailing hyphens
- Compute bodyId = "mem-body-{sanitizeId(entry.key)}" in MemoryEntryRow
- Set id={bodyId} on the expanded body container
- Set aria-controls={bodyId} on the toggle button so AT can navigate
directly between the button and its controlled panel
Closes#904
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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