fix: correct relative imports after component reorganization

Fixed import paths for 43 components moved into features/ directories.
Key fixes:
- api/, types/, hooks/, state/, utils/ imports need ../../../ from features/*/
- components/ imports need ../../ from features/*/
- Cross-feature imports use relative paths (e.g., ../tool/tools-bottom-sheet)
- app-shell.tsx updated to import from features/ subdirectories

Frontend typecheck now passes except for one pre-existing error:
xterm-addon-webgl missing type declarations.

Quality gates: ruff passed on backend, py_compile passed on all backend files.

apps/web/src/components/features/project/repositories-settings-tab.test.tsx

@@ -2,7 +2,7 @@ import { cleanup, fireEvent, render, screen, waitFor } from "@testing-library/re
 import { afterEach, describe, expect, it, vi } from "vitest";
 
 import { RepositoriesSettingsTab } from "./repositories-settings-tab";
-import * as gitRepositoriesApi from "../api/git-repositories";
+import * as gitRepositoriesApi from "../../../api/git-repositories";
 
 const mockRepositories = [
   {