Use project hashtag in OSMCha project filters

[nathanpixodeo]

What type of PR is this? (check all applicable)

• Feature
• Bug Fix
• Documentation
• Refactor
• Test
• Build or CI
• Other (please specify)

Related Issue

Fixes #7223

Describe this PR

Updates the OSMCha link formatter so project-level links filter by the default project hashtag, e.g. #hotosm-project-46866, instead of the full changeset comment. This keeps project OSMCha links inclusive when mappers adjust the rest of the comment text for the features they actually edited.

If the project hashtag cannot be found, the formatter falls back to the existing full-comment filter behavior.

Screenshots

Not applicable; this changes generated link query parameters.

Alternative Approaches Considered

I considered changing only the project detail button component, but the same project-level OSMCha button is reused in other project views. Keeping the behavior in the shared formatter keeps those project links consistent while preserving the existing full-comment behavior for task/user-specific links.

Review Guide

Run:

cd frontend
node_modules/.bin/craco.cmd test --env=jsdom --watchAll=false --testMatch **/src/utils/tests/osmchaLink.test.js
node_modules/.bin/prettier.cmd --check src/utils/osmchaLink.js src/utils/tests/osmchaLink.test.js
yarn lint --quiet src/utils/osmchaLink.js src/utils/tests/osmchaLink.test.js

Verified locally on Windows. The default CRA/Jest absolute testMatch generated for this checkout did not match under .openclaw, so the targeted test command above passes an explicit --testMatch.

Checklist before requesting a review

• Read the Tasking Manager Contributing Guide: https://github.com/hotosm/tasking-manager/blob/develop/docs/developers/contributing.md
• Read the HOT Code of Conduct: https://docs.hotosm.org/code-of-conduct
• Create small PRs. In most cases, this will be possible.
• Provide tests for your changes.
• Use descriptive commit messages.
• Update any related documentation and include any relevant screenshots.
• Does this PR introduce or change any environment variables? No.

[optional] What gif best describes this PR or how it makes you feel?

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[nathanpixodeo]

Hi maintainers, quick follow-up on this PR. The checks are green and I do not see any open review feedback. Could someone please review/approve when available? If anything else is needed, happy to update. Thanks.