feat(cli): 添加 --rule 选项支持模板自动发现

重构 ccw cli 模板系统：

- 新增 template-discovery.ts 模块，支持扁平化模板自动发现
- 添加 --rule <template> 选项，自动加载 protocol 和 template
- 模板目录从嵌套结构 (prompts/category/file.txt) 迁移到扁平结构 (prompts/category-function.txt)
- 更新所有 agent/command 文件，使用 $PROTO $TMPL 环境变量替代 $(cat ...) 模式
- 支持模糊匹配：--rule 02-review-architecture 可匹配 analysis-review-architecture.txt

其他更新：
- Dashboard: 添加 Claude Manager 和 Issue Manager 页面
- Codex-lens: 增强 chain_search 和 clustering 模块

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

codex-lens/src/codexlens/api/definition.py

@@ -0,0 +1,126 @@
+"""find_definition API implementation.
+
+This module provides the find_definition() function for looking up
+symbol definitions with a 3-stage fallback strategy.
+"""
+
+from __future__ import annotations
+
+import logging
+from pathlib import Path
+from typing import List, Optional
+
+from ..entities import Symbol
+from ..storage.global_index import GlobalSymbolIndex
+from ..storage.registry import RegistryStore
+from ..errors import IndexNotFoundError
+from .models import DefinitionResult
+from .utils import resolve_project, rank_by_proximity
+
+logger = logging.getLogger(__name__)
+
+
+def find_definition(
+    project_root: str,
+    symbol_name: str,
+    symbol_kind: Optional[str] = None,
+    file_context: Optional[str] = None,
+    limit: int = 10
+) -> List[DefinitionResult]:
+    """Find definition locations for a symbol.
+
+    Uses a 3-stage fallback strategy:
+        1. Exact match with kind filter
+        2. Exact match without kind filter
+        3. Prefix match
+
+    Args:
+        project_root: Project root directory (for index location)
+        symbol_name: Name of the symbol to find
+        symbol_kind: Optional symbol kind filter (class, function, etc.)
+        file_context: Optional file path for proximity ranking
+        limit: Maximum number of results to return
+
+    Returns:
+        List of DefinitionResult sorted by proximity if file_context provided
+
+    Raises:
+        IndexNotFoundError: If project is not indexed
+    """
+    project_path = resolve_project(project_root)
+
+    # Get project info from registry
+    registry = RegistryStore()
+    project_info = registry.get_project_by_source(str(project_path))
+    if project_info is None:
+        raise IndexNotFoundError(f"Project not indexed: {project_path}")
+
+    # Open global symbol index
+    index_db = project_info.index_root / "_global_symbols.db"
+    if not index_db.exists():
+        raise IndexNotFoundError(f"Global symbol index not found: {index_db}")
+
+    global_index = GlobalSymbolIndex(str(index_db), project_info.id)
+
+    # Stage 1: Exact match with kind filter
+    results = _search_with_kind(global_index, symbol_name, symbol_kind, limit)
+    if results:
+        logger.debug(f"Stage 1 (exact+kind): Found {len(results)} results for {symbol_name}")
+        return _rank_and_convert(results, file_context)
+
+    # Stage 2: Exact match without kind (if kind was specified)
+    if symbol_kind:
+        results = _search_with_kind(global_index, symbol_name, None, limit)
+        if results:
+            logger.debug(f"Stage 2 (exact): Found {len(results)} results for {symbol_name}")
+            return _rank_and_convert(results, file_context)
+
+    # Stage 3: Prefix match
+    results = global_index.search(
+        name=symbol_name,
+        kind=None,
+        limit=limit,
+        prefix_mode=True
+    )
+    if results:
+        logger.debug(f"Stage 3 (prefix): Found {len(results)} results for {symbol_name}")
+        return _rank_and_convert(results, file_context)
+
+    logger.debug(f"No definitions found for {symbol_name}")
+    return []
+
+
+def _search_with_kind(
+    global_index: GlobalSymbolIndex,
+    symbol_name: str,
+    symbol_kind: Optional[str],
+    limit: int
+) -> List[Symbol]:
+    """Search for symbols with optional kind filter."""
+    return global_index.search(
+        name=symbol_name,
+        kind=symbol_kind,
+        limit=limit,
+        prefix_mode=False
+    )
+
+
+def _rank_and_convert(
+    symbols: List[Symbol],
+    file_context: Optional[str]
+) -> List[DefinitionResult]:
+    """Convert symbols to DefinitionResult and rank by proximity."""
+    results = [
+        DefinitionResult(
+            name=sym.name,
+            kind=sym.kind,
+            file_path=sym.file or "",
+            line=sym.range[0] if sym.range else 1,
+            end_line=sym.range[1] if sym.range else 1,
+            signature=None,  # Could extract from file if needed
+            container=None,  # Could extract from parent symbol
+            score=1.0
+        )
+        for sym in symbols
+    ]
+    return rank_by_proximity(results, file_context)