feat(camera): add Logitech webcam support

Cargo.toml

@@ -26,6 +26,7 @@ members = [
     "crates/openlogi-inject",
     "crates/openlogi-hidpp",
     "crates/openlogi-hid",
+    "crates/openlogi-camera",
     "crates/openlogi-assets",
     "crates/openlogi-cli",
     "crates/openlogi-agent-core",

crates/openlogi-assets/src/metadata.rs

@@ -74,12 +74,16 @@ pub struct Assignment {
     /// `map_slot_name`-style consumers treat unknown names as "no hotspot".
     #[serde(rename = "slotName", default)]
     pub slot_name: String,
+    /// Camera depots ship marker-less settings-slot assignments (under the
+    /// `device_camera_image` entry, which no hotspot consumer reads); a
+    /// missing marker defaults to the origin rather than failing the file.
+    #[serde(default)]
     pub marker: Point,
     #[serde(default)]
     pub label: Direction,
 }
 
-#[derive(Debug, Deserialize, Clone, Copy)]
+#[derive(Debug, Deserialize, Clone, Copy, Default)]
 pub struct Point {
     pub x: f32,
     pub y: f32,
@@ -145,4 +149,30 @@ mod tests {
         assert_eq!((origin.width, origin.height), (3598, 1315));
         assert_eq!(meta.images[0].assignments[0].slot_name, "");
     }
+
+    /// Camera depots (StreamCam) list settings-slot assignments with no
+    /// `marker` under their `device_camera_image` entry. Parsing must not
+    /// fail wholesale, and `assignments()` must not surface them (it reads
+    /// only the `device_buttons_image` entry).
+    #[test]
+    fn camera_metadata_without_markers_parses() {
+        let json = r#"{
+          "images": [
+            { "key": "device_image", "origin": { "width": 1280, "height": 800 } },
+            {
+              "key": "device_camera_image",
+              "origin": { "width": 396, "height": 396 },
+              "assignments": [
+                { "slotId": "streamcam-0893_webcam_camera_settings",
+                  "slotName": "SLOT_NAME_WEBCAM_CAMERA_SETTINGS",
+                  "disableAssignmentClick": true }
+              ]
+            }
+          ]
+        }"#;
+        let meta: Metadata = serde_json::from_str(json).expect("camera schema must parse");
+        let origin = meta.origin().expect("origin survives");
+        assert_eq!((origin.width, origin.height), (1280, 800));
+        assert_eq!(meta.assignments().count(), 0);
+    }
 }

crates/openlogi-camera/Cargo.toml

@@ -0,0 +1,47 @@
+[package]
+name = "openlogi-camera"
+version.workspace = true
+edition.workspace = true
+rust-version.workspace = true
+license.workspace = true
+repository.workspace = true
+authors.workspace = true
+description = "Generic Logitech UVC webcam discovery for OpenLogi (AVFoundation on macOS, DirectShow on Windows)."
+keywords = ["logitech", "uvc", "webcam", "camera", "avfoundation"]
+categories = ["hardware-support"]
+
+[dependencies]
+serde = { workspace = true }
+tracing = { workspace = true }
+
+# AVFoundation (AVCaptureDevice) enumeration — same objc 0.2 toolchain the GUI's
+# menu-bar / permission FFI uses, so it's already proven in this workspace.
+[target.'cfg(target_os = "macos")'.dependencies]
+objc = "0.2"
+block = "0.1"
+
+# DirectShow enumeration + IAMVideoProcAmp / IAMCameraControl UVC controls.
+[target.'cfg(target_os = "windows")'.dependencies]
+windows = { version = "0.61", features = [
+    "Win32_Foundation",
+    "Win32_Media_DirectShow",
+    "Win32_Media_MediaFoundation",
+    "Win32_System_Com",
+    "Win32_System_Com_StructuredStorage",
+    "Win32_System_Variant",
+    "Win32_System_Ole",
+] }
+
+# Mirrors [workspace.lints], but allows the legacy `cfg(cargo-clippy)` check the
+# objc 0.2 macros emit (same as openlogi-gui / openlogi-hook). unsafe_code stays
+# denied; the AVFoundation module opts in locally with #[expect(unsafe_code)].
+[lints.rust]
+unsafe_code = "deny"
+unexpected_cfgs = { level = "allow", check-cfg = [] }
+
+[lints.clippy]
+pedantic = { level = "warn", priority = -1 }
+unwrap_used = "warn"
+expect_used = "warn"
+missing_errors_doc = "allow"
+doc_markdown = "allow"