Add user password change functionality

Introduced a backend API endpoint for changing user passwords with validation. Added a new "User Settings" page in the frontend to allow users to update their passwords, including a matching UI update for navigation and styles.

backend/app/api/routes/me.py

@@ -1,7 +1,11 @@
-from fastapi import APIRouter, Depends
+from fastapi import APIRouter, Depends, HTTPException, status
+from sqlalchemy.ext.asyncio import AsyncSession
+from app.core.db import get_db
 from app.core.deps import get_current_user
+from app.core.security import hash_password, verify_password
 from app.models.models import User
-from app.schemas.user import UserOut
+from app.schemas.user import UserOut, UserPasswordChange
+from app.services.audit import write_audit_log
 
 router = APIRouter()
 
@@ -9,3 +13,21 @@ router = APIRouter()
 @router.get("/me", response_model=UserOut)
 async def me(user: User = Depends(get_current_user)) -> UserOut:
     return UserOut.model_validate(user)
+
+
+@router.post("/me/password")
+async def change_password(
+    payload: UserPasswordChange,
+    user: User = Depends(get_current_user),
+    db: AsyncSession = Depends(get_db),
+) -> dict:
+    if not verify_password(payload.current_password, user.password_hash):
+        raise HTTPException(status_code=status.HTTP_400_BAD_REQUEST, detail="Current password is incorrect")
+
+    if verify_password(payload.new_password, user.password_hash):
+        raise HTTPException(status_code=status.HTTP_400_BAD_REQUEST, detail="New password must be different")
+
+    user.password_hash = hash_password(payload.new_password)
+    await db.commit()
+    await write_audit_log(db, action="auth.password_change", user_id=user.id, payload={})
+    return {"status": "ok"}

backend/app/core/config.py

@@ -2,7 +2,7 @@ from functools import lru_cache
 from pydantic import field_validator
 from pydantic_settings import BaseSettings, SettingsConfigDict
 
-NEXAPG_VERSION = "0.1.1"
+NEXAPG_VERSION = "0.1.2"
 
 
 class Settings(BaseSettings):

backend/app/schemas/user.py

@@ -1,5 +1,5 @@
 from datetime import datetime
-from pydantic import BaseModel, EmailStr
+from pydantic import BaseModel, EmailStr, field_validator
 
 
 class UserOut(BaseModel):
@@ -21,3 +21,15 @@ class UserUpdate(BaseModel):
     email: EmailStr | None = None
     password: str | None = None
     role: str | None = None
+
+
+class UserPasswordChange(BaseModel):
+    current_password: str
+    new_password: str
+
+    @field_validator("new_password")
+    @classmethod
+    def validate_new_password(cls, value: str) -> str:
+        if len(value) < 8:
+            raise ValueError("new_password must be at least 8 characters")
+        return value

frontend/src/App.jsx

@@ -9,6 +9,7 @@ import { QueryInsightsPage } from "./pages/QueryInsightsPage";
 import { AlertsPage } from "./pages/AlertsPage";
 import { AdminUsersPage } from "./pages/AdminUsersPage";
 import { ServiceInfoPage } from "./pages/ServiceInfoPage";
+import { UserSettingsPage } from "./pages/UserSettingsPage";
 
 function Protected({ children }) {
   const { tokens } = useAuth();
@@ -102,6 +103,9 @@ function Layout({ children }) {
           </div>
           <div>{me?.email}</div>
           <div className="role">{me?.role}</div>
+          <NavLink to="/user-settings" className={({ isActive }) => `profile-btn${isActive ? " active" : ""}`}>
+            User Settings
+          </NavLink>
           <button className="logout-btn" onClick={logout}>Logout</button>
         </div>
       </aside>
@@ -163,6 +167,7 @@ export function App() {
                 <Route path="/query-insights" element={<QueryInsightsPage />} />
                 <Route path="/alerts" element={<AlertsPage />} />
                 <Route path="/service-info" element={<ServiceInfoPage />} />
+                <Route path="/user-settings" element={<UserSettingsPage />} />
                 <Route path="/admin/users" element={<AdminUsersPage />} />
               </Routes>
             </Layout>

frontend/src/pages/UserSettingsPage.jsx

@@ -0,0 +1,100 @@
+import React, { useState } from "react";
+import { apiFetch } from "../api";
+import { useAuth } from "../state";
+
+export function UserSettingsPage() {
+  const { tokens, refresh } = useAuth();
+  const [form, setForm] = useState({
+    current_password: "",
+    new_password: "",
+    confirm_password: "",
+  });
+  const [message, setMessage] = useState("");
+  const [error, setError] = useState("");
+  const [busy, setBusy] = useState(false);
+
+  const submit = async (e) => {
+    e.preventDefault();
+    setMessage("");
+    setError("");
+    if (form.new_password.length < 8) {
+      setError("New password must be at least 8 characters.");
+      return;
+    }
+    if (form.new_password !== form.confirm_password) {
+      setError("Password confirmation does not match.");
+      return;
+    }
+
+    try {
+      setBusy(true);
+      await apiFetch(
+        "/me/password",
+        {
+          method: "POST",
+          body: JSON.stringify({
+            current_password: form.current_password,
+            new_password: form.new_password,
+          }),
+        },
+        tokens,
+        refresh
+      );
+      setForm({ current_password: "", new_password: "", confirm_password: "" });
+      setMessage("Password changed successfully.");
+    } catch (e) {
+      setError(String(e.message || e));
+    } finally {
+      setBusy(false);
+    }
+  };
+
+  return (
+    <div className="user-settings-page">
+      <h2>User Settings</h2>
+      <p className="muted">Manage your personal account security settings.</p>
+      {error && <div className="card error">{error}</div>}
+      {message && <div className="test-connection-result ok">{message}</div>}
+
+      <div className="card user-settings-card">
+        <h3>Change Password</h3>
+        <form className="grid two" onSubmit={submit}>
+          <div className="admin-field field-full">
+            <label>Current password</label>
+            <input
+              type="password"
+              value={form.current_password}
+              onChange={(e) => setForm({ ...form, current_password: e.target.value })}
+              required
+            />
+          </div>
+          <div className="admin-field">
+            <label>New password</label>
+            <input
+              type="password"
+              value={form.new_password}
+              onChange={(e) => setForm({ ...form, new_password: e.target.value })}
+              minLength={8}
+              required
+            />
+          </div>
+          <div className="admin-field">
+            <label>Confirm new password</label>
+            <input
+              type="password"
+              value={form.confirm_password}
+              onChange={(e) => setForm({ ...form, confirm_password: e.target.value })}
+              minLength={8}
+              required
+            />
+          </div>
+          <div className="form-actions field-full">
+            <button className="primary-btn" type="submit" disabled={busy}>
+              {busy ? "Saving..." : "Update Password"}
+            </button>
+          </div>
+        </form>
+      </div>
+    </div>
+  );
+}

frontend/src/styles.css

@@ -1115,6 +1115,39 @@ button {
   border-color: #38bdf8;
 }
 
+.profile-btn {
+  width: 100%;
+  display: inline-flex;
+  align-items: center;
+  justify-content: center;
+  margin-top: 8px;
+  border: 1px solid #3a63a1;
+  border-radius: 10px;
+  background: linear-gradient(180deg, #15315d, #11274c);
+  color: #e7f2ff;
+  min-height: 40px;
+  font-weight: 650;
+}
+
+.profile-btn:hover {
+  border-color: #58b0e8;
+  background: linear-gradient(180deg, #1a427a, #15335f);
+}
+
+.profile-btn.active {
+  border-color: #66c7f4;
+  box-shadow: inset 0 0 0 1px #66c7f455;
+}
+
+.user-settings-page h2 {
+  margin-top: 4px;
+  margin-bottom: 4px;
+}
+
+.user-settings-card {
+  max-width: 760px;
+}
+
 table {
   width: 100%;
   border-collapse: collapse;