[BugFix] Read the last conf line when the file has no trailing newline

`while read line` returns a non-zero status on EOF, so when a conf file
does not end with a newline the final line is read into `$line` but the
loop body never runs and that variable is silently dropped.

Keep looping while `$line` is still non-empty so the last line is
exported as well.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Signed-off-by: eason <1569163626@qq.com>

Author: Beauuu-0826

bin/common.sh

@@ -65,7 +65,7 @@ read_var_from_conf() {
 }
 
 export_env_from_conf() {
-    while read line; do
+    while read line || [[ -n "$line" ]]; do
         envline=`echo $line | sed 's/[[:blank:]]*=[[:blank:]]*/=/g' | sed 's/^[[:blank:]]*//g' | grep -E "^[[:upper:]]([[:upper:]]|_|[[:digit:]])*="`
         envline=`eval "echo $envline"`
         if [[ $envline == *"="* ]]; then