Refactor useAuth hook, settings components, and docs for formatting and readability improvements

- Consolidated multi-line arguments into single lines where appropriate in `useAuth`.
- Improved spacing and readability in data processing across components (`ProfileSettingsForm`, `PasswordChangeForm`, `SessionCard`).
- Applied consistent table and markdown formatting in design system docs (e.g., `README.md`, `08-ai-guidelines.md`, `00-quick-start.md`).
- Updated code snippets to ensure adherence to Prettier rules and streamlined JSX structures.

frontend/.nycrc.json

@@ -1,8 +1,6 @@
 {
   "all": true,
-  "include": [
-    "src/**/*.{js,jsx,ts,tsx}"
-  ],
+  "include": ["src/**/*.{js,jsx,ts,tsx}"],
   "exclude": [
     "src/**/*.d.ts",
     "src/**/*.test.{js,jsx,ts,tsx}",
@@ -16,13 +14,7 @@
     "src/lib/utils/cn.ts",
     "src/middleware.ts"
   ],
-  "reporter": [
-    "text",
-    "text-summary",
-    "html",
-    "json",
-    "lcov"
-  ],
+  "reporter": ["text", "text-summary", "html", "json", "lcov"],
   "report-dir": "./coverage-combined",
   "temp-dir": "./.nyc_output",
   "sourceMap": true,