Update homeassistant-frontend submodule to 20260312.0

[loganrosen]

Updates the HA frontend submodule from 20250109.0 to 20260312.0 (latest release), and updates HACS source code for compatibility.

Submodule update

Brings in 14 months of upstream changes including gulp 5.0.1, which fixes Node 20+ compatibility (gulp-cli@3.1.0 handles async ESM modules).

HACS source compatibility fixes

Adapts to upstream component renames and removals:

• ha-circular-progress → ha-spinner
• ha-menu/ha-md-menu-item → ha-dropdown/ha-dropdown-item
• ha-button-menu → ha-dropdown
• mwc-button + slot="primaryAction"/slot="secondaryAction" → ha-button + ha-dialog-footer slot="footer"
• createCloseHeading() → ha-dialog header-title attribute
• resources/compatibility and @polymer/polymer removed
• resources/ha-style → resources/append-ha-style
• brandsUrl useFallback option removed (API changed to local endpoint)
• Fetch brands access token on HACS init for integration icons

Build system fixes

• polymer_dir → root_dir in paths.cjs and rspack.cjs
• Remove isHassioBuild param (removed upstream)
• Write dummy iconMetadata.json for rspack resolution

CI

• Node 18 → Node 22

Tested on a live HA 2026.3.3 instance — dashboard, menus, download dialog, and repository pages all work correctly.

[Copilot]

Pull request overview

Updates the frontend build toolchain dependency on Gulp to the latest patch release and refreshes the Yarn lockfile accordingly.

Changes:

• Bump gulp from 5.0.0 to 5.0.1 in package.json.
• Update yarn.lock to reflect the new resolved versions of Gulp and related transitive dependencies.

Reviewed changes

Copilot reviewed 1 out of 2 changed files in this pull request and generated no comments.

File	Description
package.json	Pins gulp to 5.0.1 (patch upgrade).
yarn.lock	Updates lockfile resolutions/checksums for gulp and related transitive deps (e.g., gulp-cli, vinyl-fs, glob-stream, liftoff, vinyl).

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[Copilot]

Pull request overview

This PR updates the homeassistant-frontend submodule to 20260312.0 and adjusts HACS frontend code/build/CI to remain compatible with upstream frontend component and build-script changes.

Changes:

• Migrates UI components to upstream replacements (e.g., menu/dropdown, spinner, dialog footer/button patterns).
• Updates build scripts to match upstream build-script API changes (e.g., polymer_dir → root_dir) and adds a dummy icon metadata output for rspack resolution.
• Updates tooling/CI to newer Node/Yarn and refreshes dependency versions for the new frontend baseline.

Reviewed changes

Copilot reviewed 15 out of 16 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
src/localize/languages/en.json	Minor localization text capitalization update.
src/hacs.ts	Fetches/schedules brands access token during HACS init.
src/entrypoint.ts	Removes old compatibility/polymer imports; switches to append-ha-style.
src/dashboards/hacs-repository-dashboard.ts	Replaces HA menu components with ha-dropdown equivalents and updates open/anchor behavior.
src/dashboards/hacs-dashboard.ts	Same dropdown migration; updates brands URL options usage.
src/components/dialogs/hacs-form-dialog.ts	Migrates dialog actions to ha-dialog-footer + ha-button and uses headerTitle.
src/components/dialogs/hacs-download-dialog.ts	Migrates spinner and dialog footer/actions to new components.
src/components/dialogs/hacs-custom-repositories-dialog.ts	Migrates dialog header/actions to headerTitle + ha-dialog-footer + ha-button.
script/gulp/rspack.cjs	Updates HA build-script path API usage (root_dir).
script/gulp/paths.cjs	Updates HA paths wiring (root_dir).
script/gulp/app.js	Wraps dummy icon generation task to also write iconMetadata.json.
package.json	Updates dependencies/devDependencies and Yarn version pointer.
.yarnrc.yml	Updates Yarn release path.
.github/workflows/test.yml	Updates CI Node version to 22.

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[Copilot]

Pull request overview

Copilot reviewed 15 out of 16 changed files in this pull request and generated 3 comments.

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