docs(todo): restore cross cd local_path capability task in P3

- Restore P3 entry for adding cross cd to local_path capability
- Document relationship with P2 refactor task (different approaches)
- P2: refactor default behavior to local_path
- P3: document alternative approaches (flags, separate command)
- Both tasks are valid and complementary

Author: f5epcim

TODO.md

@@ -124,6 +124,29 @@
   - **Priority Rationale:** Low priority - UX improvement, not a bug
   - **Status:** Documented for future implementation
 
+- [ ] **Add `cross cd` to local_path capability** - Currently only changes to worktree
+  - **Issue:** `cross cd` currently opens a shell in the WORKTREE (hidden `.git/cross/worktrees/`)
+  - **Desired Behavior:**
+    - Provide ability to change directory to LOCAL_PATH (the actual patched directory in main repo)
+    - Options:
+      1. Add `--local` flag: `cross cd --local [patch]` → changes to local_path
+      2. Add separate command: `cross path [patch]` → outputs local_path for use with shell `cd $(cross path patch)`
+      3. Make `cd` default to local_path, add `--worktree` flag for old behavior (covered in P2 refactor)
+  - **Current Implementation:**
+    - Justfile (lines 761-797): `cd` target opens shell in worktree directory
+    - Go (lines 681-730): Same behavior - opens shell in worktree
+    - Rust: Similar behavior
+  - **Relationship to P2 Task:**
+    - P2 refactor will change default behavior to local_path
+    - This task documents alternative approaches (flags, separate command)
+    - May be resolved by P2 implementation or kept as additional options
+  - **Effort:** 2-3 hours
+  - **Files:** `Justfile.cross`, `src-go/main.go`, `src-rust/src/main.rs`, `test/017_cd_local.sh`
+  - **Complexity:** LOW - Add path resolution and output logic
+  - **Impact:** MEDIUM - Improves workflow for users editing patched files
+  - **Priority Rationale:** Low priority - workaround exists (manually navigate to patch), P2 refactor may address this
+  - **Status:** Not yet implemented, may be covered by P2 refactor
+
 ### Completed Enhancements
 
 ## Known Issues (To FIX)