fix: remove hardcoded 48-character limit from text inputs

[tomerqodo]

Benchmark PR from qodo-benchmark#417

[sentry]

Bug: The input length validation item[varIndex].length > varItem.max_length silently fails when varItem.max_length is undefined, as the comparison evaluates to false.
_{Severity: MEDIUM}

Suggested Fix

Add a check to ensure varItem.max_length is a valid number before performing the comparison. For example: if (varItem.max_length && item[varIndex].length > varItem.max_length). This will prevent the comparison against undefined and ensure validation is only performed when a limit is actually set.

Prompt for AI Agent

Review the code at the location below. A potential bug has been identified by an AI
agent.
Verify if this is a real issue. If it is, propose a fix; if not, explain why it's not
valid.

Location: web/app/components/share/text-generation/index.tsx#L261-L263

Potential issue: The code performs a length check on string-type variables using `if
(item[varIndex].length > varItem.max_length)`. However, the `max_length` property on
`varItem` is optional and may be `undefined`, particularly since default values were
removed in this PR. In JavaScript, a numeric comparison against `undefined` (e.g., `10 >
undefined`) evaluates to `false`. Consequently, if a string variable is defined without
a `max_length`, the validation will be silently skipped, allowing users to submit inputs
that exceed intended limits without any error notification.

_{Did we get this right? 👍 / 👎 to inform future reviews.}