chore: release core 0.7.50, server 0.8.62, cli 0.10.54 and two more

[vivek7405]

Clears every package carrying unreleased user-facing work since the 0.7.49 batch. intellisense, vscode, and nvim picked up nothing in the range, so they stay where they are.

package	from	to
@webjsdev/core	0.7.49	0.7.50
@webjsdev/server	0.8.61	0.8.62
@webjsdev/cli	0.10.53	0.10.54
@webjsdev/mcp	0.1.13	0.1.14
@webjsdev/ui	0.3.12	0.3.13

core takes the two attribute-reader fixes (#1359, #1361). A custom converter.fromAttribute never ran during SSR, and the SSR reader resolved attribute names with its own resolver rather than the set observedAttributes delivers, so a first paint held one value and the upgraded element held another. Both readers now share one implementation. Two behaviour notes ride the entries: a converter touching a browser global now throws server-side, and three attribute shapes read LESS at SSR to match what the browser already did.

server takes boot-time validation of the webjs config block (#1355) and the auto-linking of app/icon / app/apple-icon (#1379), plus fixes for the webjs.headers rules dropped in silence (#1362) and the production message for a form submission arriving as a GET (#1385).

cli emits one cross-agent instruction set from webjs create (#1368), sources the scaffold gallery from the repo's runnable gallery/ app (#1371), and refuses webjs check outside an app (#1356).

mcp resolves the docs corpus from the app being edited rather than the snapshot frozen into a global install, and says which one it served.

ui stops two registry modules doing work at module scope (#1360) and teaches cn() the Tailwind v4 parenthesis hint spelling (#1357).

Ordering and ranges

changelog/core/0.7.50.md carries the earliest date: of the batch, so core publishes first. packages/server's declared @webjsdev/core range moves from ^0.7.49 to ^0.7.50. No new core export is imported statically, but the release PR is the only place that bump is legal.

Curation

The generated notes were rewritten to each package's own slice before committing.

• feat: resolve form-submitter boundness in webjs check and make the residual loud #1314 is dropped from server entirely. It added the submitter-needs-bound-form check rule that fix: drop submitter-needs-bound-form, which contradicts #1307 #1385 then removed inside the same range, so the rule never reaches a release. What actually ships is the clearer WEBJS_FORM_SUBMITTED_AS_GET diagnostic, which the fix entry describes.
• Slices that were only a docblock, a test, or an export keyword are dropped from the packages that saw nothing else (feat(server): validate the webjs config block at boot #1355 from core and cli, fix: webjs check refuses to run outside an app #1356 from mcp, fix(ui): stop registry modules doing work at module scope #1360 from server, fix: drop submitter-needs-bound-form, which contradicts #1307 #1385 from core).

Verification

• node --test test/packaging/*.mjs test/repo-health/*.mjs, 126 pass, 0 fail.
• npm pack --dry-run --workspace=@webjsdev/cli. The 0.10.54 tarball bundles 125 templates/gallery files, which matters because this is the first release since feat(gallery): promote scaffold gallery to root gallery/ app #1371 moved the gallery out of the committed template tree and behind a prepack step. postpack cleaned up after itself.
• The website's changelog reader parses all five new entries.