fix(cdp): emit canAccessOpener in all TargetInfo payloads, add aarch64 cross-compile CI

Merges PR #165 and PR #172.

PR #165: The CDP spec marks canAccessOpener as a required boolean on
TargetInfo but Obscura was omitting it. Strict Rust clients like
chromiumoxide reject the event entirely and panic with "Created target
not present" when the field is absent. Added canAccessOpener: false
to every TargetInfo emitted by setDiscoverTargets, getTargets,
createTarget, attachToBrowserTarget, attachToTarget, and getTargetInfo.

PR #172: Added a cross-compile matrix entry for aarch64-unknown-linux-gnu
running on ubuntu-22.04 x86_64, producing obscura-aarch64-linux-cross.
This is a fallback for when GitHub ARM runners are unavailable without
removing the native ARM build.

.github/workflows/release.yml

@@ -20,18 +20,30 @@ jobs:
             # newer glibc shipped by ubuntu-latest.
             os: ubuntu-22.04
             name: obscura-x86_64-linux
+            cross: false
           - target: aarch64-unknown-linux-gnu
+            # Native build on GitHub's ARM runner.
             os: ubuntu-22.04-arm
             name: obscura-aarch64-linux
+            cross: false
+          - target: aarch64-unknown-linux-gnu
+            # Cross-compile fallback from x86_64 Ubuntu 22.04. Same glibc
+            # 2.35 floor, useful when ARM runners are unavailable.
+            os: ubuntu-22.04
+            name: obscura-aarch64-linux-cross
+            cross: true
           - target: aarch64-apple-darwin
             os: macos-latest
             name: obscura-aarch64-macos
+            cross: false
           - target: x86_64-apple-darwin
             os: macos-latest
             name: obscura-x86_64-macos
+            cross: false
           - target: x86_64-pc-windows-msvc
             os: windows-latest
             name: obscura-x86_64-windows
+            cross: false
 
     runs-on: ${{ matrix.os }}
 
@@ -42,6 +54,17 @@ jobs:
         with:
           targets: ${{ matrix.target }}
 
+      - name: Install cross-compilation toolchain (aarch64-linux)
+        if: matrix.cross == true
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y gcc-aarch64-linux-gnu
+          mkdir -p .cargo
+          cat >> .cargo/config.toml << 'CARGO_EOF'
+          [target.aarch64-unknown-linux-gnu]
+          linker = "aarch64-linux-gnu-gcc"
+          CARGO_EOF
+
       - name: Build
         run: cargo build --release --target ${{ matrix.target }}
 

crates/obscura-cdp/src/domains/target.rs

@@ -16,6 +16,7 @@ pub async fn handle(method: &str, params: &Value, ctx: &mut CdpContext) -> Resul
                         "title": "",
                         "url": "",
                         "attached": true,
+                        "canAccessOpener": false,
                         "browserContextId": "",
                     }
                 }),
@@ -30,6 +31,7 @@ pub async fn handle(method: &str, params: &Value, ctx: &mut CdpContext) -> Resul
                             "title": page.title,
                             "url": page.url_string(),
                             "attached": false,
+                            "canAccessOpener": false,
                             "browserContextId": page.context.id,
                         }
                     }),
@@ -48,6 +50,7 @@ pub async fn handle(method: &str, params: &Value, ctx: &mut CdpContext) -> Resul
                         "title": page.title,
                         "url": page.url_string(),
                         "attached": true,
+                        "canAccessOpener": false,
                         "browserContextId": page.context.id,
                     })
                 })
@@ -90,6 +93,7 @@ pub async fn handle(method: &str, params: &Value, ctx: &mut CdpContext) -> Resul
                             "title": page.title,
                             "url": page.url_string(),
                             "attached": false,
+                            "canAccessOpener": false,
                             "browserContextId": page.context.id,
                         }
                     }),
@@ -107,6 +111,7 @@ pub async fn handle(method: &str, params: &Value, ctx: &mut CdpContext) -> Resul
                             "title": page.title,
                             "url": page.url_string(),
                             "attached": true,
+                            "canAccessOpener": false,
                             "browserContextId": page.context.id,
                         },
                         "waitingForDebugger": false,
@@ -133,6 +138,7 @@ pub async fn handle(method: &str, params: &Value, ctx: &mut CdpContext) -> Resul
                         "title": "",
                         "url": "",
                         "attached": true,
+                        "canAccessOpener": false,
                         "browserContextId": "",
                     },
                     "waitingForDebugger": false,
@@ -158,6 +164,7 @@ pub async fn handle(method: &str, params: &Value, ctx: &mut CdpContext) -> Resul
                             "title": page.title,
                             "url": page.url_string(),
                             "attached": true,
+                            "canAccessOpener": false,
                             "browserContextId": page.context.id,
                         },
                         "waitingForDebugger": false,
@@ -211,6 +218,7 @@ pub async fn handle(method: &str, params: &Value, ctx: &mut CdpContext) -> Resul
                             "title": page.title,
                             "url": page.url_string(),
                             "attached": true,
+                            "canAccessOpener": false,
                             "browserContextId": page.context.id,
                         }
                     }))