[RawJat]

Antigravity no longer runs a language_server process on Windows. Antigravity IDE and VS Code's Antigravity extension (google.google-antigravity 1.10.0) both start %USERPROFILE%\.gemini\bin\agy.exe --hub, so Codenotch never found the server, and the ring fell back to counting today's requests ("~0"). With both closed there was no server at all. Refs #410.

Antigravity open: its server is read, as before.

• The process search also looks for agy.exe. When both are running, the IDE's language_server is used, as in the Mac's AntigravityBridge.discover.
• Only a process with a token is used. Without one the hub answers 401.
• agy.exe passes --csrf_token=<t>, so the flag reader accepts that form as well as --csrf_token <t>. Doctor's line now says "local server".

Antigravity closed: that agy.exe reads the quota on its own, through the --print /usage reader Codenotch already has.

• It runs at launch, on a click and on a hover, at most once every five minutes, and never on the poll's timer. With the ring hidden, nothing runs at launch. Between reads the reading keeps its age.
• Reads set AGY_CLI_DISABLE_AUTO_UPDATE=true (agy ignores 1). Without it, a due 15-minute update check started agy --bg-updater, which opened a Windows Terminal window. This covers the standalone CLI's reads too.
• find_agy is unchanged, so a standalone CLI install behaves as before.

The Mac starts a server of its own for this. Here agy.exe --hub answers after 5 s but holds about 207 MB for as long as Codenotch runs. The one-off read takes about 12 s and holds nothing between reads.

Overlap: #495 makes request_hover_refresh test-only and replaces the ConPTY runner, so this conflicts with it in antigravity.rs and agy_cli.rs. If #495 lands first, I'll resolve it here. #450 changes only the non-Windows discover().

Test plan

• cargo test -p codenotch: 318 passed, including new tests for both flag forms, which server is used, when a read is due, when a hover wakes the poller, and the environment agy gets. Clippy: nothing in the changed files.
• Doctor with VS Code's extension running: "language_server not running" before, "local server running" on two ports after. Codenotch read all four lanes from it.
• A temporary build that ignored the running server and polled every 20 s: one agy read at launch with all four lanes, none on three timer ticks, none with the ring hidden.
• The flash, with an update check due, a release build started by codenotch-hook.exe and a window watcher running. Before, agy logged "Spawned background update process" and a Windows Terminal window opened. After, it logged "Auto-update disabled via environment variable", and no updater or window appeared.
• With Antigravity IDE running.
• With Antigravity and VS Code really closed, a hover starting a read.