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/git/file-editor.tsx

@@ -1,12 +1,12 @@
 import React, { useCallback, useEffect, useState } from "react";
 import { useSearchParams } from "react-router-dom";
-import { apiClient } from "../api/client";
-import { useAuth } from "../state/auth";
-import { CodeEditor } from "../components/code-editor";
-import { CommitDialog } from "../components/features/git/commit-dialog";
-import { Icon } from "../components/icon";
-import { SyntaxHighlighter } from "../components/syntax-highlighter";
-import { detectLanguage } from "../utils/language";
+import { apiClient } from "../../../api/client";
+import { useAuth } from "../../../state/auth";
+import { CodeEditor } from "../../code-editor";
+import { CommitDialog } from "./commit-dialog";
+import { Icon } from "../../icon";
+import { SyntaxHighlighter } from "../../syntax-highlighter";
+import { detectLanguage } from "../../../utils/language";
 
 interface FileEditorProps {
   projectId: string;