The <input maxlength=100> attribute capped direct user edits but did
not cover the Tiptap editor-mirror path. A 5000-char @-suffix in the
contenteditable would mirror unchanged into searchQuery and reach
runSearch. Clipping at the mirror keeps both paths bounded. The
literal in the maxlength attribute is also bound to the new
MAX_QUERY_LENGTH constant so the two stay in sync. Server-side cap
tracked separately. Nora #1 on PR #629.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
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