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/terminal/terminal.tsx

@@ -14,7 +14,7 @@ import "xterm/css/xterm.css";
 import {
 	applyModifierToChar,
 	type ModifierKey,
-} from "../hooks/use-special-keys";
+} from "../../../hooks/use-special-keys";
 
 export interface TerminalProps {
 	instanceId: string;