fix: keep the file list up to date after uploads

[AlexAndBear]

Description

• Footer size: “N items with X in total” sums the listed resources instead of using the folder size from the first PROPFIND, so it updates after upload, delete and copy.
• Replaced files: after an upload with “Replace”, resources with a changed etag are updated, so size and date are current without reload.

	Before	After
Footer after delete
Replace upload

Related Issue

• No issue, found in the functional bug sweep of the web client

How Has This Been Tested?

• test environment: local dev server, Playwright (Chromium)
• upload and delete a file: footer total updates without reload
• replace an existing file by upload: row size changes from 20 B to 50 B without reload
• unit tests added

Types of changes

• Bugfix
• Enhancement (a change that doesn't break existing code or deployments)
• Breaking change (a modification that affects current functionality)
• Technical debt (addressing code that needs refactoring or improvements)
• Tests (adding or improving tests)
• Documentation (updates or additions to documentation)
• Maintenance (like dependency updates or tooling adjustments)

[JammingBen]

upsertResources doesn't merge but overwrites resources, leading to thumbnail and remoteItemId getting lost. You can see this in a share space, where replacing a resource now resets the preview image to the default one (because SSE isn't there to cover for it).

[AlexAndBear]

Good catch, this turned out to be a general problem: a changed row is never re-rendered, so its preview isn't loaded again. Rows and tiles are now keyed by etag (fixes it for SSE, uploads and other updates), and the upload sets the share id like the folder loader does.

This also fixes:

• Replaced files without SSE: on main the list didn't update replaced files at all, the old preview, size and etag stayed.
• Previews in the tiles view after SSE updates: the SSE handler loads thumbnail-sized previews, the re-rendered tile now loads one in tile size.
• Saving in apps: AppWrapper sets the new etag after saving, so the list now shows the updated preview instead of the old one.