[chore] panel: prettier reformat across the codebase

Apply `pnpm format` (prettier 3.8.5, 80-col / double-quote / semi /
trailing-comma-all) to the 223 pre-existing panel files that predated the
prettier infra added in cb5365a4. Pure formatting — no semantic changes:
multi-line arrays/objects collapsed where they fit, trailing newlines added
(.prettierrc.json), import grouping unchanged.

Verified: `pnpm format:check` clean, `pnpm lint` clean, `pnpm typecheck`
clean, `pnpm test` 113/113 pass (7 files).

panel/vitest.config.ts

@@ -8,11 +8,7 @@ export default defineConfig({
     setupFiles: ["./src/test/setup.ts"],
     coverage: {
       provider: "v8",
-      include: [
-        "src/lib/**",
-        "src/store/**",
-        "src/components/**",
-      ],
+      include: ["src/lib/**", "src/store/**", "src/components/**"],
       reporter: ["text", "lcov", "json-summary"],
     },
   },