chore: remove ServiceLink integration

- Drop the ServiceLink submodule, link-serve command, and serve --rpc mode.
- Remove the now-unused httpx dependency and regenerate uv.lock.
- Add a privacy policy for Chrome Web Store publication.
- Refresh extension icons and bump package/extension version to 0.14.2.
- Keep the native TCP serve path as the only remote-control endpoint.

uv.lock

@@ -2,28 +2,13 @@ version = 1
 revision = 3
 requires-python = ">=3.10"
 
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-    { name = "typing-extensions", marker = "python_full_version < '3.13'" },
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-
 [[package]]
 name = "browser-cli"
-version = "0.14.1"
+version = "0.14.2"
 source = { editable = "." }
 dependencies = [
     { name = "click" },
     { name = "cryptography" },
-    { name = "httpx" },
     { name = "msgpack" },
     { name = "rich" },
 ]
@@ -44,7 +29,6 @@ dev = [
 requires-dist = [
     { name = "click", specifier = ">=8" },
     { name = "cryptography", specifier = ">=48" },
-    { name = "httpx", specifier = ">=0.28" },
     { name = "msgpack", specifier = ">=1" },
     { name = "rich", specifier = ">=13" },
     { name = "zstandard", marker = "extra == 'fast'", specifier = ">=0.22" },
@@ -58,15 +42,6 @@ dev = [
     { name = "zstandard", specifier = ">=0.22" },
 ]
 
-[[package]]
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-version = "2026.5.20"
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-
 [[package]]
 name = "cffi"
 version = "2.0.0"
@@ -357,52 +332,6 @@ wheels = [
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 ]
 
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-version = "0.16.0"
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-
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-version = "1.0.9"
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-dependencies = [
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-
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-name = "httpx"
-version = "0.28.1"
-source = { registry = "https://pypi.org/simple" }
-dependencies = [
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 [[package]]
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 version = "2.3.0"