feat: add Options__GetCrashReportURL hook

Reads CrashReportURL from HKCU Options registry key into static buffer.
Completes the 7-function configuration system port to Rust.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

crates/openwa-types/src/address.rs

@@ -388,6 +388,9 @@ pub mod va {
     /// Stream volume byte
     pub const G_STREAM_VOLUME: u32 = 0x0088_AEDD;
 
+    /// CrashReportURL static buffer (0x400 bytes)
+    pub const G_CRASH_REPORT_URL: u32 = 0x0079_FFD8;
+
     // === Game context (DDGame struct offsets) ===
     // These are offsets from the DDGame base pointer, not absolute addresses.
     // DDGame pointer is obtained from hookConstructDDGameWrapper param.

crates/openwa-wormkit/src/replacements/config.rs

@@ -7,6 +7,7 @@
 //! - Registry__DeleteKeyRecursive (0x4E4D10): recursive registry deletion
 //! - Registry__CleanAll (0x4C90D0): full registry cleanup
 //! - GameInfo__LoadOptions (0x460AC0): game options from registry
+//! - Options__GetCrashReportURL (0x5A63F0): crash report URL from registry
 
 use openwa_types::address::va;
 use crate::log_line;
@@ -286,6 +287,31 @@ unsafe extern "stdcall" fn hook_load_options(gi: u32) {
     let _ = log_line("[Config] LoadOptions completed (Rust)");
 }
 
+// ============================================================
+// Options__GetCrashReportURL replacement (0x5A63F0)
+// ============================================================
+
+/// Rust replacement for Options__GetCrashReportURL.
+/// cdecl() -> *const u8 (pointer to static buffer, or null)
+unsafe extern "cdecl" fn hook_get_crash_report_url() -> u32 {
+    let buf = rb(va::G_CRASH_REPORT_URL) as *mut u8;
+    let buf_slice = core::slice::from_raw_parts_mut(buf, 0x400);
+
+    let len = openwa_lib::wa::registry::read_profile_string(
+        "Options",
+        "CrashReportURL",
+        buf_slice,
+    );
+
+    if len > 0 {
+        // Null-terminate
+        *buf.add(len) = 0;
+        buf as u32
+    } else {
+        0 // null pointer = not found
+    }
+}
+
 // ============================================================
 // Hook installation
 // ============================================================
@@ -327,6 +353,12 @@ pub fn install() -> Result<(), String> {
             va::GAMEINFO_LOAD_OPTIONS,
             hook_load_options as *const (),
         )?;
+
+        let _ = crate::hook::install(
+            "Options__GetCrashReportURL",
+            va::OPTIONS_GET_CRASH_REPORT_URL,
+            hook_get_crash_report_url as *const (),
+        )?;
     }
 
     Ok(())