fix(webpack): fallback for empty chunk name

[simllll]

fixes #7665

Types of changes

• Bug fix (a non-breaking change which fixes an issue)
• New feature (a non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Description

if all chunks have no name, it results to an empty compactName. Due to #7639 this results into file paths like /common/.xxx.js. As files with a dot at the beginnign are not served, this is a problem ;-)

Checklist:

• My change requires a change to the documentation.
• I have updated the documentation accordingly. (PR: #)
• I have added tests to cover my changes (if not applicable, please state why)
• All new and existing tests are passing.

[codecov-commenter]

Codecov Report

Merging #7667 into dev will decrease coverage by 0.03%.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##              dev    #7667      +/-   ##
==========================================
- Coverage   70.18%   70.14%   -0.04%     
==========================================
  Files          88       88              
  Lines        3756     3758       +2     
  Branches     1019     1020       +1     
==========================================
  Hits         2636     2636              
- Misses        911      912       +1     
- Partials      209      210       +1     

Flag	Coverage Δ
#unittests	70.14% <0.00%> (-0.04%)	⬇️

Impacted Files	Coverage Δ
packages/webpack/src/config/client.js	61.17% <0.00%> (-1.48%)	⬇️

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[simllll]

Lgtm

[pi0]

Thanks @simllll. Would you please confirm it working using nuxt-edge before doing release? (should be published in few minutes)

[simllll]

@pi0 just tested it, I can confirm the issue is fixed in nuxt-edge. looks good, thanks!