bug: Fix contains error in task matching

[Radhika252007]

Problem

The app throws an error when the contains-based matching logic is used with empty, null, or unexpected values. This causes the affected feature to fail and prevents the user from completing the intended action.Summary
The app currently throws or mishandles a contains-related error when matching task content.

Expected behavior

Matching should work correctly without crashing or producing incorrect results.

Steps to reproduce

Open the app and trigger the affected flow.
Perform the action that uses the contains-based matching.
Observe the error.

[soniya1610]

/claim

[aaniya22]

please assign this to me under gssoc'26

[deepikarthinikanche]

/assign