0496 build: drop obsolete ncurses local dependency

prepare-local-deps.sh

@@ -5,7 +5,9 @@
 # the generated dependency trees to git.  The mars-nwe root repository remains the
 # only superproject; mars-* bundles are materialized as the configured submodule
 # working trees, while selected upstream release tarballs are unpacked into the
-# submodule paths that the build already expects.
+# submodule paths that the build already expects.  FLAIM no longer needs a
+# staged ncurses header snapshot; its CMake import uses the bundled curses
+# compatibility shim, and termbox2 is unpacked as its terminal UI dependency.
 
 set -eu
 
@@ -108,11 +110,6 @@ extract_headers() {
     tar -xf "$tarball" -C "$work" --strip-components=1
 
     case "$name" in
-        ncurses)
-            echo "==> extracting ncurses headers -> $PREFIX/include"
-            install_header_tree "$work/include" "$PREFIX/include"
-            install_header_tree "$work/ncurses" "$PREFIX/include/ncurses"
-            ;;
         pam)
             echo "==> extracting PAM headers -> $PREFIX/include/security"
             install_header_tree "$work/libpam/include/security" "$PREFIX/include/security"
@@ -134,7 +131,7 @@ print_cmake_hints() {
 
 Prepared local dependency prefix: $PREFIX
 
-Use the local GDBM build and extracted PAM/ncurses headers like this:
+Use the local GDBM build and extracted PAM headers like this:
 
   cmake -S . -B build \\
     -DCMAKE_PREFIX_PATH=$PWD/$PREFIX \\
@@ -143,9 +140,9 @@ Use the local GDBM build and extracted PAM/ncurses headers like this:
     -DPAM_INCLUDE_DIR=$PWD/$PREFIX/include \\
     -DPAM_LIBRARY=$pam_lib
 
-PAM_LIBRARY above was auto-detected for this host.  PAM and
-ncurses are not vendored libraries here: only their headers are staged for
-compile checks, and final linking is against the system libraries.
+PAM_LIBRARY above was auto-detected for this host.  PAM is not vendored
+here: only its headers are staged for compile checks, and final linking is
+against the system library.
 HINTS
 }
 
@@ -169,7 +166,6 @@ copy_tree_from_tar "$(find_one 'termbox2-2.5.0.tar*.gz')" third_party/termbox2
 copy_tree_from_tar "$(find_one 'iniparser-4.2.6.tar*.gz')" third_party/iniparser
 
 build_gdbm "$(find_one 'gdbm-1.26.tar*.gz')"
-extract_headers "$(find_one 'ncurses-snapshots-6_6_20260608.tar*.gz')" ncurses
 extract_headers "$(find_one 'Linux-PAM-1.7.2.tar*.xz')" pam
 
 print_cmake_hints