fix: close the tail items from the targeted re-audit

Resolves the 13 rows still partial in docs/rewrite/notes/review-rv4-
codex.md (details in final-Z5.md):
- Escaped config strings are decoded to raw bytes at every OS boundary:
  Flatpak cwd/argv to D-Bus, screen-file paths, the default config
  template, GHOSTTY_RESOURCES_DIR/TERMINFO/shell integration/
  bindtextdomain consumers, custom shader loading, list-themes hyperlinks.
- osbytes escapes literal U+FDD0 on non-Unix too (bijective everywhere);
  the GTK paste dialog only decodes text that was actually encoded.
- shadertoy: whole-array uses of iChannelTime rebuild a plain float[4]
  from the std140-padded members (naga-validated, MSL offsets checked).
- libghostty-vt: the OSC parser holds caller-allocated storage inline
  and command payloads borrow from it, so ghostty_osc_end performs no
  global allocations (verified from Rust and C).
- crash: aarch64 Linux minidump context fixed; macOS fatal signals record
  siginfo, registers and a fault-safe stack walk.
- tripwire: selectionString map allocation-failure cleanup test ported.
- libghostty-vt emits the versioned soname libghostty-vt.so.0 at build
  time (no patchelf needed at install).

Test Plan:
- cargo test --workspace (3342 passed)
- just check-macos; just check-macos x86_64-apple-darwin;
  just check-windows; just check-wasm
- cargo check --target aarch64-unknown-linux-gnu -p ghostty-crash

crates/ghostty-vt-capi/tests/common/mod.rs

@@ -29,6 +29,9 @@ fn cargo() -> Command {
     Command::new(std::env::var_os("CARGO").unwrap_or_else(|| "cargo".into()))
 }
 
+/// Major version of libghostty-vt (the soname suffix set by build.rs).
+pub const VT_MAJOR: u32 = 0;
+
 static INSTALLED: OnceLock<PathBuf> = OnceLock::new();
 
 /// Build the cdylib/staticlib for the host and install them as
@@ -61,6 +64,19 @@ fn install_native_lib_once() -> PathBuf {
             std::fs::rename(&tmp, &dst).expect("install library");
         }
     }
+    // The cdylib's soname is versioned (`libghostty-vt.so.<major>`, see
+    // build.rs), so executables linked against it need that name at run time
+    // (otherwise the loader would fall back to an unrelated system copy).
+    let so = dir.join("libghostty-vt.so");
+    if so.exists() {
+        let versioned = dir.join(format!("libghostty-vt.so.{VT_MAJOR}"));
+        let tmp = dir.join(format!(
+            "libghostty-vt.so.{VT_MAJOR}.{}.tmp",
+            std::process::id()
+        ));
+        std::fs::copy(&so, &tmp).expect("install versioned library");
+        std::fs::rename(&tmp, &versioned).expect("install versioned library");
+    }
     dir
 }