fix(installer): close detector false-pass gaps

tools/e2e-install-test.sh

@@ -182,14 +182,19 @@ fi
 printf '[fixture] installer_exit=%d done_claims=%s\n' \
   "$install_status" "$(grep -cF 'Done.' "$install_log" || true)"
 
-# P0 Resolve context
-shell="$(getent passwd "$(id -u)" | cut -d: -f7)"
-if [[ "$(id -u)" -ne 0 && "$home" == "/home/mosaic" && "$shell" == "/bin/bash" ]] \
+# P0 Resolve context. Keep this final fixture row as discriminating as the
+# installer's own P0 row: the expected-RED comparator binds this exact reason.
+passwd_row="$(getent passwd "$(id -u)")"
+target_user="$(printf '%s' "$passwd_row" | cut -d: -f1)"
+passwd_home="$(printf '%s' "$passwd_row" | cut -d: -f6)"
+shell="$(printf '%s' "$passwd_row" | cut -d: -f7)"
+if [[ "$(id -u)" -eq 1001 && "$target_user" == "mosaic" \
+  && "$home" == "/home/mosaic" && "$home" == "$passwd_home" && "$shell" == "/bin/bash" ]] \
   && ldd --version 2>&1 | grep -i 'glibc\|gnu libc' >/dev/null \
   && [[ "$(node -p 'Number(process.versions.node.split(".")[0])')" -ge 20 ]]; then
-  phase_pass P0 "target=mosaic uid=$(id -u) HOME=$home shell=$shell libc=glibc node=$(node --version)"
+  phase_pass P0 "target=$target_user uid=$(id -u) HOME=$home passwd_HOME=$passwd_home shell=$shell privilege=user arch=$(uname -m) libc=glibc node=$(node --version) npm=$(npm --version)"
 else
-  phase_fail P0 "context unresolved or unsupported (uid=$(id -u) HOME=$home shell=${shell:-unknown})"
+  phase_fail P0 "context unresolved or unsupported (target=${target_user:-unknown} uid=$(id -u) HOME=$home passwd_HOME=${passwd_home:-unknown} shell=${shell:-unknown} privilege=user)"
 fi
 
 # P1 Preflight