Fix edit validator path fallback and reject whitespace-only completion markers

Edit validator had the same relative-path and traversal fallback issue
as the read/write validators. Applied the same normalization and ".."
rejection pattern.

Methodology completion checker now trims whitespace before emptiness
validation, preventing whitespace-only done markers or report files
from passing the content gate.

Author: SihaoLiu

hooks/lib/methodology-analysis.sh

@@ -122,6 +122,8 @@ complete_methodology_analysis() {
 
     local done_content
     done_content=$(cat "$done_file" 2>/dev/null || echo "")
+    # Trim whitespace to reject whitespace-only markers
+    done_content="${done_content#"${done_content%%[![:space:]]*}"}"
     if [[ -z "$done_content" ]]; then
         return 1
     fi
@@ -134,6 +136,7 @@ complete_methodology_analysis() {
     fi
     local report_content
     report_content=$(cat "$report_file" 2>/dev/null || echo "")
+    report_content="${report_content#"${report_content%%[![:space:]]*}"}"
     if [[ -z "$report_content" ]]; then
         echo "Warning: methodology-analysis-report.md is empty, blocking completion" >&2
         return 1

hooks/loop-edit-validator.sh

@@ -104,8 +104,27 @@ if [[ -n "$_MA_LOOP_DIR" ]] && [[ -f "$_MA_LOOP_DIR/methodology-analysis-state.m
     fi
     _ma_real_loop=$(realpath "$_MA_LOOP_DIR" 2>/dev/null || echo "")
     # Fallback to raw paths when realpath is unavailable (older macOS/BSD)
-    [[ -z "$_ma_real_path" ]] && _ma_real_path="$FILE_PATH"
-    [[ -z "$_ma_real_loop" ]] && _ma_real_loop="$_MA_LOOP_DIR"
+    # Ensure paths are absolute and reject ".." to prevent traversal bypasses.
+    if [[ -z "$_ma_real_path" ]]; then
+        if [[ "$FILE_PATH" == *".."* ]]; then
+            echo "# Edit Blocked During Methodology Analysis
+
+Path contains traversal segments that cannot be resolved without realpath." >&2
+            exit 2
+        fi
+        if [[ "$FILE_PATH" == /* ]]; then
+            _ma_real_path="$FILE_PATH"
+        else
+            _ma_real_path="$PROJECT_ROOT/$FILE_PATH"
+        fi
+    fi
+    if [[ -z "$_ma_real_loop" ]]; then
+        if [[ "$_MA_LOOP_DIR" == /* ]]; then
+            _ma_real_loop="$_MA_LOOP_DIR"
+        else
+            _ma_real_loop="$PROJECT_ROOT/$_MA_LOOP_DIR"
+        fi
+    fi
     if [[ "$_ma_real_path" == "$_ma_real_loop/"* ]]; then
         _ma_basename=$(basename "$_ma_real_path")
         case "$_ma_basename" in