Add headless wgpu vision and camera controls

docs/grid-agent-operations.md

@@ -226,8 +226,12 @@ The example records all current queue, message, conversation, tool, behavior,
 reconnect, and interaction defaults. Important defaults include 256 grid events,
 32 control commands, 512 observations, four concurrent inference requests,
 16 tool calls, 512 active senders/sessions, a two-minute model window, and bounded
-10-second shutdown. Vision defaults to a 320x180 software-rendered JPEG with bounded
-entities, triangles, texture work, JPEG bytes, time, and concurrency.
+10-second shutdown. Vision defaults to a 320x180 headless-wgpu JPEG with a
+deterministic software fallback and bounded entities, triangles, texture work,
+JPEG bytes, time, and concurrency. Authorized `behavior_camera_set` calls are
+limited to 96 meters from the avatar by default, require a distinct target, and
+accept a 20-120 degree vertical field of view; `behavior_camera_reset` restores
+the avatar-facing 60-degree view.
 
 Unsupported by design: arbitrary raw packets or agent-control flags, arbitrary
 shell/subprocess execution, provider/model discovery outside Mentra, remote plaintext
@@ -248,7 +252,8 @@ cargo audit
 
 Record the binary byte size (`stat -c %s` on Linux or `Get-Item ... .Length` on
 PowerShell) and the `cargo tree` inventory. Reject CLR/scripting/provider SDK,
-subprocess adapters, Skia/GPU, or undeclared native libraries on the agent path.
+subprocess adapters, unreviewed graphics stacks, or undeclared native libraries
+on the agent path.
 The consolidated Gitea gate runs only on `ubuntu-latest`; Windows portability is
 proved by the existing cross-target compile/static gate rather than a Windows
 Gitea runner.