feat(frontend): add the model detail page

[tanishqgandhi1908]

What changes were proposed in this PR?

Refactor. user-dataset-file-renderer's did/dvid inputs become resourceId/versionId, so a model no longer has to smuggle its ids through dataset-shaped names. download moves onto the resource descriptor: card-item and list-item both carried a workflow/dataset branch, and both now ask descriptor.download.

One deliberate behavior change: the branch read entry.workflow.workflow.name, which a rename leaves stale, so downloading a just-renamed workflow produced a zip named after the old name. It now reads entry.name. Covered by a test.

The model detail page. A read-only page at /user/model/:mid: name, created-at, public/downloadable/framework/format tags, placeholder view and like counters, cover image; a Model Card tab; and a Versions & Files tab with the version picker, file tree, file preview, and single-file and version-ZIP downloads. ModelService gains the read endpoints, DownloadService the three model downloads, and ModelResourceDescriptor a privateRoute — so the cards added in #8068 now open something.

The file renderer takes a resourceType input, but resolves its fetch through a new retrieveSingleFile descriptor slot rather than growing a type === "model" arm, which is the point of the registry.

No Settings tab yet, on purpose. Metadata editing (name, description, framework, format) lands with upload in the next PR; visibility, sharing and covers in the one after.

View and like counters read a constant 0, deliberately. The hub backend has no model entity — hub/EntityType.scala is Seq(Workflow, Dataset) with a throwing fromString, EntityTables.forType matches only those two, and there are no model_user_likes / model_view_count tables, so every hub call from this page would 400. The tags are there so the header matches the dataset page; they get wired up in the hub PR, alongside #7930.

Any related issues, documentation, discussions?

Part of #6499. Depends on #8068.

How was this PR tested?

New: 26 specs for the detail page, 7 for the new ModelService methods, 3 for the model downloads, 2 for the renderer's model branch, plus registry coverage for download and retrieveSingleFile.

The refactor's proof is that all 353 existing user-dataset specs pass unmodified. Four specs elsewhere needed scaffolding changes, none of them changed expectations: three card-item template tests set entry without running the input pipeline and now call initializeEntry() (a pattern already used in that file), and one list-item test moved from (component as any).downloadService to TestBed.inject(DownloadService),since the component no longer injects it.

Full dashboard and hub suite: 1880 tests, all passing. Verified manually against a local stack.

Was this PR authored or co-authored using generative AI tooling?

Generated-by: Claude Code

[github-actions]

Automated Reviewer Suggestions

Based on the git blame history of the changed files, we recommend the following reviewers:

• Contributors with relevant context: @Neilk1021, @mengw15, @eugenegujing
  You can notify them by mentioning @Neilk1021, @mengw15, @eugenegujing in a comment.

[codecov-commenter]

Codecov Report

❌ Patch coverage is 92.51337% with 28 lines in your changes missing coverage. Please review.
✅ Project coverage is 93.52%. Comparing base (b3ff4b7) to head (e5973dd).

Files with missing lines	Patch %	Lines
...el/user-model-explorer/model-detail.component.html	91.35%	14 Missing ⚠️
...odel/user-model-explorer/model-detail.component.ts	90.84%	8 Missing and 5 partials ⚠️
...ashboard/service/user/download/download.service.ts	90.90%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #8072      +/-   ##
============================================
- Coverage     93.52%   93.52%   -0.01%     
  Complexity     4709     4709              
============================================
  Files          1193     1195       +2     
  Lines         48113    48463     +350     
  Branches       5344     5378      +34     
============================================
+ Hits          45000    45324     +324     
- Misses         1671     1693      +22     
- Partials       1442     1446       +4     

Flag	Coverage Δ		*Carryforward flag
access-control-service	81.00% <ø> (ø)		Carriedforward from b3ff4b7
agent-service	99.32% <ø> (ø)		Carriedforward from b3ff4b7
amber	89.59% <ø> (ø)		Carriedforward from b3ff4b7
computing-unit-managing-service	73.67% <ø> (ø)		Carriedforward from b3ff4b7
config-service	86.73% <ø> (ø)		Carriedforward from b3ff4b7
file-service	87.91% <ø> (ø)		Carriedforward from b3ff4b7
frontend	95.86% <92.51%> (-0.06%)	⬇️
notebook-migration-service	79.31% <ø> (ø)		Carriedforward from b3ff4b7
pyamber	98.54% <ø> (ø)		Carriedforward from b3ff4b7
workflow-compiling-service	77.19% <ø> (ø)		Carriedforward from b3ff4b7

*This pull request uses carry forward flags. Click here to find out more.

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[tanishqgandhi1908]

/request-review @aicam