feat: integrate Google semantic search and branded desktop launcher

tools/embeddinggemma2/build_runtime.py

@@ -0,0 +1,58 @@
+"""Build a pinned isolated native worker; development VM builds use --backend cpu."""
+import argparse
+import os
+from pathlib import Path
+import shutil
+import subprocess
+import sys
+
+ROOT = Path(__file__).resolve().parents[2]
+TAG = "b11461"
+COMMIT = "4d756bc72bf00a4aacf410ae15a2d315f3db400d"
+
+
+def run(arguments, cwd=None):
+    subprocess.run([str(value) for value in arguments], cwd=cwd, check=True)
+
+
+def main():
+    parser = argparse.ArgumentParser(description="Build Searchi's pinned Google embedding worker")
+    parser.add_argument("--backend", choices=["cpu", "auto", "metal", "vulkan", "cuda"], default="cpu")
+    parser.add_argument("--jobs", type=int, default=2)
+    args = parser.parse_args()
+    if not 1 <= args.jobs <= 16:
+        parser.error("jobs must be 1–16")
+    source = ROOT / ".searchi/references/llama.cpp"
+    build = ROOT / ".searchi/runtime" / args.backend
+    if not source.exists():
+        source.parent.mkdir(parents=True, exist_ok=True)
+        run(["git", "clone", "--depth", "1", "--branch", TAG,
+             "https://github.com/ggml-org/llama.cpp.git", source])
+    actual = subprocess.check_output(["git", "rev-parse", "HEAD"], cwd=source, text=True).strip()
+    if actual != COMMIT:
+        raise RuntimeError("Runtime reference checkout differs from pinned commit; refusing to reset it")
+    patch = Path(__file__).with_name("no-logits.patch")
+    check = subprocess.run(["git", "apply", "--check", str(patch)], cwd=source, capture_output=True)
+    if check.returncode == 0:
+        run(["git", "apply", patch], cwd=source)
+    else:
+        reverse = subprocess.run(["git", "apply", "--reverse", "--check", str(patch)], cwd=source, capture_output=True)
+        if reverse.returncode:
+            raise RuntimeError("Runtime memory patch cannot be applied or verified")
+    cmake_exe = shutil.which("cmake")
+    if not cmake_exe:
+        try:
+            import cmake
+            cmake_exe = str(Path(cmake.CMAKE_BIN_DIR) / ("cmake.exe" if os.name == "nt" else "cmake"))
+        except ImportError as error:
+            raise RuntimeError("Install CMake first (python -m pip install cmake)") from error
+    worker_source = ROOT / "crates/searchi-semantic/native"
+    run([cmake_exe, "-S", worker_source, "-B", build,
+         "-DCMAKE_BUILD_TYPE=Release", f"-DLLAMA_CPP_DIR={source}",
+         f"-DSEARCHI_ACCELERATION={args.backend}"])
+    run([cmake_exe, "--build", build, "--config", "Release", "--parallel", args.jobs])
+    print(f"Runtime build complete: {build}")
+
+
+if __name__ == "__main__":
+    main()