Merge Luma launcher fork into monorepo

Move trampoline files (boot-hook, watcher, overlay) into trampoline/
subdirectory. Add upstream Luma v2.3.1 source at repo root with our
additions:

- Page::Ha (4th nav tab) with placeholder empty state
- HA tab config schema and default entity mapping (ha-home/)
- Nav keys renamed: "home" → "start", new "ha" tab between Apps and Settings
- All state.rs/view.rs/main.rs/tests.rs updated for 4-tab navigation

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

agents.md

@@ -0,0 +1,99 @@
+# Luma agent context
+
+## Project
+
+Luma is a native Rust/SDL2/OpenGL ES 2 launcher for rooted LG webOS TVs. Rust source is in
+`src/`, original assets/translations in `assets/`, shared vector geometry in `vector-geometry/`,
+the host SVG compiler in `tools/vector-assets/`, packaging/tooling in `tools/`, and desktop smoke
+scripts in `tests/`. There is no React/JSX/browser application. Read `development.md` for details.
+
+Use pnpm, Oxlint and Oxfmt for build tools; Cargo/rustfmt/Clippy for Rust. `nix develop` supplies
+pinned Rust 1.93, ARMv7 std, Node 24, pnpm 10.34.5, SDL2, woff2 and Python/fontTools. The webOS
+SDK is separate: `pnpm sdk`, then set `WEBOS_NDK` to `.build/toolchain/arm-webos-linux-gnueabi_sdk-buildroot`.
+
+```sh
+pnpm install --frozen-lockfile
+pnpm format:check
+pnpm check
+pnpm test
+pnpm assets
+pnpm test:smoke
+pnpm run package
+```
+
+`pnpm check` does not execute tests. `pnpm test` is workspace unit tests; smoke scripts render
+desktop OpenGL and mock weather HTTP. Linux can use `xvfb-run -a pnpm test:smoke`. Tests must not
+contact real weather APIs or a TV. Respect any user instruction to use manual TV verification
+instead of running automated tests. Builds/lint may still be run. Do not claim hardware behavior
+from desktop checks. Add a `pnpm changeset` file for release-worthy changes and leave version
+bumps to the automated Version Packages PR. Its `pnpm version:release` command synchronizes
+`package.json`, `appinfo.json`, the root `Cargo.toml`, the `luma` entry in `Cargo.lock` and README
+IPK examples. Supporting Rust crates retain independent versions. `pnpm version:check` checks
+consistency without writing files. Code or behavior changes should use semantic versioning:
+patch for backward-compatible fixes, minor for backward-compatible features, and major for
+breaking changes. Documentation-only or maintenance changes that do not need a release can omit
+a changeset.
+
+## Build and identity
+
+`com.ecklf.luma` is the native app's ID and `luma` its executable. Root `appinfo.json` is the
+package metadata source. It installs separately from the former web app `com.luma.launcher` and
+prototypes `com.luma.launcher.native` and `com.luma.native`, all excluded from app inventory. Preferences are local JSON
+per installation; browser local storage and preferences from other IDs are not migrated.
+
+ARM builds must use the NDK's gnueabi soft-float calling convention and explicit sysroot, with
+isolated pkg-config. Preserve the Cortex-A9/VFP Rust flags and `getauxval` compatibility.
+The SDK's SDL has dummy video: use checksum-pinned SDL-webOS with standard SDL ABI and a real
+webOS/Wayland backend. Do not use rust-sdl2's generic bundled SDL or ship host libraries. Native
+packages use `Architecture: arm`, preserve executable mode and include licenses/checksums/feed.
+
+## Runtime constraints
+
+Keep input/rendering on the SDL thread and TV/HTTP work off it. Luna requests originate from the
+native process, not `luna-send-pub -a` impersonation. Inventory failure must never substitute demo
+data on TV. Explicit `--test-extra-apps` is a labeled manual preview applied only after successful
+inventory reads, with separate preferences and no placeholder launch requests.
+
+Pointer hover/down must not move a clicked control. Home favorites use one horizontal strip;
+remote focus/reordering reveals the whole selected card. Apps Up/Down follows six-column grid
+indices, including offscreen rows, so headers cannot steal mid-grid navigation. Back restores
+setting subpage parents and supports SDL-webOS Back. OK finishes move mode without launching.
+
+Vector icon/logo assets are standalone SVGs compiled to `.lvec` at build time. Font outlines
+are tessellated only as needed; text runs use bounded GPU caches, lazy CJK and no glyph bitmap
+atlas. Text AA prefers MSAA of intact outlines, with a narrow fringe fallback; keep physical
+origin/baseline snapping and logical 1920×1080 layout. `--resolution 4k` is experimental, not a
+shipping-default claim. Profiles count presentations; ordinary `--frames` is event-loop iterations.
+
+Weather uses ureq/rustls, fixed Open-Meteo origins, bounded replies/timeouts, no proxy/redirects,
+separate workers/cache and generation IDs. Cache Celsius and convert units without replacing it.
+Only configured/enabled/visible Home starts forecasts. Shared translations are bundled locally.
+Match the current native design without on-screen weather credits; attribution remains in docs.
+
+## Assets
+
+SVG sources and fonts retain licenses in `assets/`. TV app artwork is resolved at runtime from
+inventory/installed manifests by `src/app_artwork.rs`, with an embedded Node 8-compatible elevated
+reader for jailed installations. Reads/decoding stay on its worker; GPU uploads stay on SDL.
+Refresh invalidates cached results. No collected icon map or card-colour JSON is used or shipped.
+Desktop previews use curated vectors and generic/category fallbacks. Do not add dumped TV images
+or per-TV icon maps to the repository.
+Do not replace vector logos with PNG exports.
+Curated vectors use the exact app-ID allowlist in `src/branding.rs`, never title/substring matching.
+Every logo in `assets/logos/` must have a desktop demo app. `pnpm test:brands` renders the full
+gallery to `.build/brands-gallery.png`; source restoration via `pnpm assets:brands` is optional.
+
+## CI and releases
+
+`.github/workflows/ci.yml` is native-only: format/lint/workspace tests, asset generation and
+mocked desktop rendering, SDK setup, ARM cross-build, actual IPK verification/checksum/feed,
+artifacts and guarded publication. Keep existing published-version/draft/tag-commit checks.
+`.github/workflows/changeset-status.yml` maintains an informational changeset status comment on
+PRs, including forks, with semantic-version guidance for code changes. It skips the generated
+version PR. Its `pull_request_target` jobs must not install dependencies or run code from the PR.
+`.github/workflows/release-pr.yml` maintains the Changesets version PR and dispatches its CI
+checks with the built-in token. Only a merged `changeset-release/main` PR with a version increase
+can publish after the main-branch CI build passes. Ordinary PRs, other merges and manual CI runs
+still build/check/package but do not publish. See `development.md#releases` for setup and retries.
+Only create commits or PRs when explicitly requested. For PR descriptions follow the global
+`commands/pr.md` format instructions.