refactor: 移除 CLI 中过宽的异常捕获

- 移除所有 16 个 except Exception 块
- 只保留对特定异常的捕获 (StorageError, ConfigError, SearchError 等)
- 允许未知异常自然传播，便于调试
- 保留嵌入功能的可选异常处理

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

codex-lens/src/codexlens/cli/commands.py

@@ -1546,7 +1546,6 @@ def model_delete(
     Example:
         codexlens model-delete fast  # Delete fast model
     """
-    try:
     from codexlens.cli.model_manager import delete_model
 
     if not json_mode:
@@ -1578,7 +1577,6 @@ def model_info(
     Example:
         codexlens model-info code  # Get code model details
     """
-    try:
     from codexlens.cli.model_manager import get_model_info
 
     result = get_model_info(profile)
@@ -1627,7 +1625,6 @@ def embeddings_status(
         codexlens embeddings-status ~/.codexlens/indexes/project/_index.db  # Check specific index
         codexlens embeddings-status ~/projects/my-app                  # Check project (auto-finds index)
     """
-    try:
     from codexlens.cli.embedding_manager import check_index_embeddings, get_embedding_stats_summary
 
     # Determine what to check
@@ -1788,7 +1785,6 @@ def embeddings_generate(
     """
     _configure_logging(verbose)
 
-    try:
     from codexlens.cli.embedding_manager import generate_embeddings, generate_embeddings_recursive
 
     # Resolve path