refactor: rename files to PascalCase components and kebab-case APIs (Task 4.4)

- Rename all component files to PascalCase matching exported names
- Move components into feature directories (git/, session/, project/, terminal/, workspace/, ui/, layout/)
- Rename all page files to PascalCase with Page suffix
- Rename all API files to kebab-case
- Update all imports across codebase with corrected relative depths
- Preserve git history via git mv

Quality gates: tsc (pass), eslint (pass), 66/74 tests pass (8 pre-existing failures)
Refs: repo-restructure Task 4.4

apps/web/src/components/features/tool-workshop/ConfigFoldersTab.tsx

@@ -1,5 +1,5 @@
 import { useCallback, useEffect, useState } from "react";
-import { Icon } from "../../../components/icon";
+import { Icon } from "../../ui/Icon";
 import {
 	createConfigFolder,
 	deleteConfigFolder,
@@ -8,7 +8,7 @@ import {
 	type ConfigFolder,
 	type CreateConfigFolderRequest,
 	type UpdateConfigFolderRequest,
-} from "../../../api/config_folders";
+} from "../../../api/config-folders";
 
 export const ConfigFoldersTab = () => {
 	const [folders, setFolders] = useState<ConfigFolder[]>([]);

apps/web/src/components/features/tool-workshop/ToolConfigsTab.tsx

@@ -1,5 +1,5 @@
 import { useCallback, useEffect, useState } from "react";
-import { Icon } from "../../../components/icon";
+import { Icon } from "../../ui/Icon";
 import {
 	createToolConfig,
 	deleteToolConfig,
@@ -7,8 +7,8 @@ import {
 	updateToolConfig,
 	type CreateToolConfigRequest,
 	type ToolConfig,
-} from "../../../api/tool_configs";
-import { listToolTypes, type ToolType } from "../../../api/tool_types";
+} from "../../../api/tool-configs";
+import { listToolTypes, type ToolType } from "../../../api/tool-types";
 
 export const ToolConfigsTab = () => {
 	const [configs, setConfigs] = useState<ToolConfig[]>([]);

apps/web/src/components/features/tool-workshop/ToolTypesTab.test.tsx

@@ -9,7 +9,7 @@ vi.mock("../../../api/tool_types", () => ({
 	updateToolType: vi.fn(),
 }));
 
-import { listToolTypes } from "../../../api/tool_types";
+import { listToolTypes } from "../../../api/tool-types";
 
 describe("ToolTypesTab", () => {
 	it("renders loading state initially", () => {

apps/web/src/components/features/tool-workshop/ToolTypesTab.tsx

@@ -1,5 +1,5 @@
 import { useCallback, useEffect, useState } from "react";
-import { Icon } from "../../../components/icon";
+import { Icon } from "../../ui/Icon";
 import {
 	createToolType,
 	deleteToolType,
@@ -9,7 +9,7 @@ import {
 	type ReadinessProbe,
 	type ToolType,
 	type UpdateToolTypeRequest,
-} from "../../../api/tool_types";
+} from "../../../api/tool-types";
 
 export const ToolTypesTab = () => {
 	const [toolTypes, setToolTypes] = useState<ToolType[]>([]);