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>

tools/vector-assets.mjs

@@ -0,0 +1,115 @@
+import fs from 'node:fs/promises';
+import path from 'node:path';
+import { spawnSync } from 'node:child_process';
+import { pathToFileURL } from 'node:url';
+
+const root = path.resolve(import.meta.dirname, '..');
+const out = path.join(root, '.build/assets');
+const sources = path.join(root, '.build/vector-sources');
+
+export async function generateVectorAssets() {
+  await fs.mkdir(sources, { recursive: true });
+  const assets = [];
+  for (const file of await fs.readdir(path.join(root, 'assets/logos'))) {
+    if (!file.endsWith('.svg')) continue;
+    const name = path.parse(file).name;
+    const expanded = ![
+      'apple-tv',
+      'disney-plus',
+      'prime-video',
+      'das-erste',
+      'netflix',
+      'youtube',
+      'arte',
+      'zdf',
+      'jellyfin',
+    ].includes(name);
+    assets.push({
+      source: path.join(root, 'assets/logos', file),
+      output: path.join(out, 'logos', `${name}.lvec`),
+      monochrome: [
+        'apple-tv',
+        'disney-plus',
+        'prime-video',
+        'das-erste',
+        'plex',
+        'hbo-max',
+        'paramount-plus',
+        'twitch',
+        'dazn',
+        'rakuten-tv',
+        'apple-music',
+        'amazon-music',
+        'bbc-iplayer',
+        'itvx',
+        'channel-4',
+        'now-tv',
+        'joyn',
+        'waipu-tv',
+        'zattoo',
+        'skyshowtime',
+        'movistar-plus',
+        'nrk-tv',
+      ].includes(name),
+      light_ink: expanded && !['live-tv', 'browser'].includes(name),
+      trim: expanded,
+      reference_size: 1536,
+    });
+  }
+
+  // Standalone SVG sources preserve the shipped Lucide and input artwork.
+  // No React renderer, JSX loader or JavaScript icon dependency is needed.
+  for (const file of await fs.readdir(path.join(root, 'assets/ui-icons'))) {
+    if (!file.endsWith('.svg')) continue;
+    const name = path.parse(file).name;
+    assets.push({
+      source: path.join(root, 'assets/ui-icons', file),
+      output: path.join(out, 'ui-icons', `${name}.lvec`),
+      reference_size: 256,
+    });
+  }
+
+  const manifest = path.join(sources, 'manifest.json');
+  await fs.writeFile(manifest, JSON.stringify(assets));
+  const result = spawnSync(
+    'cargo',
+    [
+      'run',
+      '--locked',
+      '--release',
+      '--manifest-path',
+      path.join(root, 'tools/vector-assets/Cargo.toml'),
+      '--',
+      manifest,
+    ],
+    {
+      cwd: root,
+      env: {
+        ...process.env,
+        CARGO_TARGET_DIR: path.join(root, '.build/vector-assets-target'),
+      },
+      stdio: 'inherit',
+      timeout: 120000,
+    },
+  );
+  if (result.error) throw result.error;
+  if (result.status !== 0) throw new Error('Native SVG geometry compilation failed.');
+  await fs.writeFile(
+    path.join(out, 'vector-artwork.json'),
+    JSON.stringify({
+      version: 1,
+      assets: assets.map((asset) => path.relative(out, asset.output)),
+    }),
+  );
+  // These directories contain generated artwork only. Do not package stale raster
+  // versions alongside the meshes when reusing an older native asset cache.
+  for (const directory of ['logos', 'ui-icons']) {
+    for (const file of await fs.readdir(path.join(out, directory))) {
+      if (file.endsWith('.png')) await fs.rm(path.join(out, directory, file));
+    }
+  }
+}
+
+if (process.argv[1] && import.meta.url === pathToFileURL(path.resolve(process.argv[1])).href) {
+  await generateVectorAssets();
+}