Fix MCP dep tool parameter names to match CLI (issue_id/depends_on_id)

- Changed from confusing from_id/to_id to clear issue_id/depends_on_id
- Matches CLI convention: bd dep add [issue-id] [depends-on-id]
- Updated all tests and implementations
- Fixes GH #113 where Claude Code was creating dependencies backwards

Closes bd-58

Amp-Thread-ID: https://ampcode.com/threads/T-f01aca11-a10f-4908-9ce6-7e1734f2068f
Co-authored-by: Amp <amp@ampcode.com>

integrations/beads-mcp/src/beads_mcp/tools.py

@@ -229,8 +229,8 @@ async def beads_reopen_issue(
 
 
 async def beads_add_dependency(
-    from_id: Annotated[str, "Issue that depends on another (e.g., bd-2)"],
-    to_id: Annotated[str, "Issue that blocks or is related to from_id (e.g., bd-1)"],
+    issue_id: Annotated[str, "Issue that has the dependency (e.g., bd-2)"],
+    depends_on_id: Annotated[str, "Issue that issue_id depends on (e.g., bd-1)"],
     dep_type: Annotated[
         DependencyType,
         "Dependency type: blocks, related, parent-child, or discovered-from",
@@ -239,22 +239,22 @@ async def beads_add_dependency(
     """Add a dependency relationship between two issues.
 
     Types:
-    - blocks: to_id must complete before from_id can start
+    - blocks: depends_on_id must complete before issue_id can start
     - related: Soft connection, doesn't block progress
     - parent-child: Epic/subtask hierarchical relationship
-    - discovered-from: Track that from_id was discovered while working on to_id
+    - discovered-from: Track that issue_id was discovered while working on depends_on_id
 
     Use 'discovered-from' when you find new work during your session.
     """
     client = await _get_client()
     params = AddDependencyParams(
-        from_id=from_id,
-        to_id=to_id,
+        issue_id=issue_id,
+        depends_on_id=depends_on_id,
         dep_type=dep_type,
     )
     try:
         await client.add_dependency(params)
-        return f"Added dependency: {from_id} depends on {to_id} ({dep_type})"
+        return f"Added dependency: {issue_id} depends on {depends_on_id} ({dep_type})"
     except BdError as e:
         return f"Error: {str(e)}"