Keyword search fails in web view if any repository lacks the `keywords` field

[ngmy]

Describe the bug
In the repositories field of satis.json, if the set includes even a single repository whose composer.json lacks the keywords field, the keyword search in the web view does not work.
This prevents filtering repositories by keyword correctly.

To Reproduce

1. Run satis build as Docker container.
   satis.json:

   {
       "name": "<my-org>/<my-repo>",
       "homepage": "http://<my-satis-server-url>",
       "output-dir": "public",
       "repositories": [
           {
               "type": "vcs",
               "url": "https://github.com/<my-org>/<my-repo-with-keywords-field>"
           },
           {
               "type": "vcs",
               "url": "https://github.com/<my-org>/<my-repo-without-keywords-field>"
           }
       ],
       "archive": {
           "directory": "dist"
       },
       "require-all": true
   }

2. Open a web view and search by keyword.

Outcome
JavaScript error occurring during keyword search in web view:

index.html:387 Uncaught TypeError: Cannot read properties of null (reading 'textContent')
    at index.html:387:16187
    at Array.forEach (<anonymous>)
    at t.value (index.html:387:16063)
(anonymous) @ index.html:387
value @ index.html:387
setTimeout
(anonymous) @ index.html:387

Expected behavior
We expect the keyword search to ignore repositories that are missing the keywords field and filter only based on the keywords of repositories that have the field.

Additional context
Browser: Google Chrome 139.0.7258.128