Refactor (packages/web/src/components/share/part.tsx): Function with high complexity

[sissizh3n]

P1B: Starter Task: Refactoring PR

Use this pull request template to briefly answer the questions below in one to two sentences each.
Feel free to delete this text at the top after filling out the template.

1. Issue

Link to the associated GitHub issue:
#17

Full path to the refactored file:
packages/web/src/components/share/part.tsx

What do you think this file does?
(Your answer does not have to be 100% correct; give a reasonable, evidence‑based guess.)
This file matches data passed as PartProps to corresponding HTML blocks on the UI.

What is the scope of your refactoring within that file?
(Name specific functions/blocks/regions touched.)
Edited functions: flattenToolArgs()
Added helper functions: walk(), formatToolArgValue()
Lines changed (shown in diff): 758 - 794

Which Qlty‑reported issue did you address?
(Name the rule/metric and include the BEFORE value; e.g., “Cognitive Complexity 18 in render()”.)
Function with high complexity (count = 21) in flattenToolArgs()

2. Refactoring

How did the specific issue you chose impact the codebase’s maintainability?

• flattenToolArgs() checked if obj was nested in 3 places in function body.
• flattenToolArgs() takes obj with unknown type, so there's no contract on what data type we stop flattening (i.e. what data type counts as a single leaf node that's no longer nested.)

What changes did you make to resolve the issue?

• Delegated recursion logic to helper walk(), adding the conditional check as a base case at the top of walk()
• Wrote formatToolArgValue() to isolate formatting logic, adding JSON.stringify for non-primitive data types.
• Removed old implementation of flattenToolArgs()

How do your changes improve maintainability? Did you consider alternatives?

• Refactored code fix the check in 1 place in the helper function walk(). If a new leaf node data type is added, there's only 1 if conditional to check instead of 3, reducing probability of missing one of the if branches.
• Formatting logic is separate from flattening logic. A new helper owns how display text is rendered. If text formatting is altered in the future we only need to check the helper.
  Alternatives: refactoring the function to an iterative implementation instead of recursion. I didn't implement this because it addresses scalability (stack overflow if the input is deeply nested / very large), not maintainability.

3. Validation

How did you validate that the change is correct?
By writing tests in part.test.tsx in the same directory.

Attach a screenshot of the test coverage showing the lines were executed by the tests.

Note: Screenshot below displays that the uncovered lines in part.tsx does not include lines for my implemented changes.

Attach a screenshot showing the tests that cover the change passing during CI

Attach a screenshot of qlty smells --no-snippets <full/path/to/file.ts> showing fewer reported issues after the changes.
Before: (main branch)

After: (fix-flatten-tool-args branch)

Additional GradeScope Screenshots
bun lint and bun test passing locally