fix(types): resolve pyright errors introduced in #269 changes

- manifest.py: remove unused load_bottle_chain_from_dir import
- manifest_extends.py: drop redundant ManifestEgressRoute annotation
- test_cli_start_selector.py: remove unused call import
- test_cli_tui.py: move Optional/constants to top, annotate FakeScreen,
  remove unused curses import
- test_manifest_bottle_merge.py: add type args to dict, annotate **kwargs

bot_bottle/manifest.py

@@ -488,7 +488,7 @@ class ManifestIndex:
             bottle = raw_bottle if merged == raw_bottle.git_user else replace(raw_bottle, git_user=merged)
             return Manifest(agent=agent, bottle=bottle)
 
-        from .manifest_loader import load_bottle_chain_from_dir, scan_agent_names
+        from .manifest_loader import scan_agent_names
         from .manifest_schema import validate_agent_frontmatter_keys
         from .yaml_subset import YamlSubsetError, parse_frontmatter
 

bot_bottle/manifest_extends.py

@@ -48,7 +48,7 @@ def _merge_two_bottles_runtime(base: "ManifestBottle", override: "ManifestBottle
         for n in merged_repos_names
     )
 
-    merged_routes: tuple[ManifestEgressRoute, ...] = base.egress.routes + override.egress.routes
+    merged_routes = base.egress.routes + override.egress.routes
     merged_egress = ManifestEgressConfig(routes=merged_routes, Log=override.egress.Log)
 
     return ManifestBottle(