fix: prevent non whitespace characters from being sent from input

[uinstinct]

Description

Prevent non-whitespace characters from being sent in the input.

closes #6285
closes #9605

resolves CON-5313

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Tool calls are already prevented from being empty in this line:

continue/core/tools/parseArgs.ts

Lines 59 to 61 in 81c23ec

	if (!allowEmpty && !value.trim()) {
	throw new Error(`Argument ${argName} must not be empty or whitespace-only`);
	}

which was the possible source of error in #6285

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Checklist

• [] I've read the contributing guide
• [] The relevant docs, if any, have been updated or created
• [] The relevant tests, if any, have been updated or created

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before.mp4

after.mp4

Tests

[ What tests were added or updated to ensure the changes work as expected? ]

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Summary by cubic

Block sending whitespace-only input from the TipTap editor. Valid messages now require non-whitespace text, a mention, or a Prompt/Code block (addresses Linear CON-5313; fixes edge cases from #6285 and #9605).

• Bug Fixes
  • Update hasValidEditorContent to ignore whitespace-only text via trim() and treat mention nodes as valid.
  • Preserve PromptBlock and CodeBlock as valid content.

^{Written for commit 2a717dd. Summary will update on new commits.}

[cubic-dev-ai]

No issues found across 1 file

[RomneyDa]

Nice fix!