feat: Phase 3 campaign management

Campaign CRUD API with cascading delete across all campaign-scoped
tables, a systems endpoint to seed the create-campaign form, active
campaign state wired to the sidebar chaos factor, and a campaign
management view for creating/switching/deleting campaigns.

public/css/styles.css

@@ -156,6 +156,22 @@ h1, h2, h3, h4, h5, h6 {
   transform: rotate(180deg);
 }
 
+.sidebar-active-campaign {
+  flex-shrink: 0;
+  padding: 10px 16px;
+  border-bottom: 1px solid var(--border);
+  font-family: var(--font-body);
+  font-size: 0.78rem;
+  color: var(--accent);
+  white-space: nowrap;
+  overflow: hidden;
+  text-overflow: ellipsis;
+}
+
+.sidebar.collapsed .sidebar-active-campaign {
+  display: none;
+}
+
 .sidebar-nav {
   flex: 1;
   overflow-y: auto;

public/index.html

@@ -28,6 +28,8 @@
         </button>
       </div>
 
+      <div class="sidebar-active-campaign" id="activeCampaignName">No active campaign</div>
+
       <nav class="sidebar-nav">
         <div class="nav-section">
           <div class="nav-section-label">Oracle</div>
@@ -147,4 +149,5 @@
   </div>
 </body>
 <script src="js/app.js" type="module"></script>
+<script src="js/campaigns.js" type="module"></script>
 </html>

public/js/api.js

@@ -1 +1,51 @@
 // Mythic Oracle — shared fetch wrapper, all API calls
+
+const BASE_URL = '/api';
+
+async function request(path, options = {}) {
+  const response = await fetch(`${BASE_URL}${path}`, {
+    headers: { 'Content-Type': 'application/json' },
+    ...options,
+  });
+
+  if (!response.ok) {
+    let message = `Request failed: ${response.status}`;
+    try {
+      const body = await response.json();
+      if (body.error) message = body.error;
+    } catch {
+      // no JSON body on the error response
+    }
+    throw new Error(message);
+  }
+
+  if (response.status === 204) {
+    return null;
+  }
+
+  return response.json();
+}
+
+export function getCampaigns() {
+  return request('/campaigns');
+}
+
+export function createCampaign(data) {
+  return request('/campaigns', { method: 'POST', body: JSON.stringify(data) });
+}
+
+export function getCampaign(id) {
+  return request(`/campaigns/${id}`);
+}
+
+export function updateCampaign(id, data) {
+  return request(`/campaigns/${id}`, { method: 'PATCH', body: JSON.stringify(data) });
+}
+
+export function deleteCampaign(id) {
+  return request(`/campaigns/${id}`, { method: 'DELETE' });
+}
+
+export function getSystems() {
+  return request('/systems');
+}

public/js/app.js

@@ -1,14 +1,20 @@
 // Mythic Oracle — entry, sidebar routing, campaign context
 
+import { getCampaign, updateCampaign } from './api.js';
+
 const STORAGE_KEYS = {
   sidebarCollapsed: 'mo-sidebar-collapsed',
   activeView: 'mo-active-view',
   theme: 'mo-theme',
+  activeCampaignId: 'mo-active-campaign-id',
 };
 
 const CHAOS_MIN = 1;
 const CHAOS_MAX = 9;
 
+let activeCampaign = null;
+let navigateToView = null;
+
 function initSidebarCollapse() {
   const sidebar = document.getElementById('sidebar');
   const toggle = document.getElementById('collapseToggle');
@@ -33,16 +39,15 @@ function initNavRouting() {
     views.forEach((view) => {
       view.classList.toggle('active', view.id === `view-${viewId}`);
     });
+    localStorage.setItem(STORAGE_KEYS.activeView, viewId);
   }
 
   navItems.forEach((item) => {
-    item.addEventListener('click', () => {
-      const viewId = item.dataset.view;
-      activateView(viewId);
-      localStorage.setItem(STORAGE_KEYS.activeView, viewId);
-    });
+    item.addEventListener('click', () => activateView(item.dataset.view));
   });
 
+  navigateToView = activateView;
+
   const savedView = localStorage.getItem(STORAGE_KEYS.activeView);
   const validView = savedView && document.getElementById(`view-${savedView}`);
   activateView(validView ? savedView : 'oracle');
@@ -62,24 +67,81 @@ function initThemeToggle() {
   });
 }
 
-function initChaosFactorControls() {
+function renderChaosFactor() {
   const value = document.getElementById('chaosValue');
+  value.textContent = activeCampaign ? activeCampaign.chaos_factor : '—';
+}
+
+function renderActiveCampaignName() {
+  const el = document.getElementById('activeCampaignName');
+  el.textContent = activeCampaign ? activeCampaign.name : 'No active campaign';
+}
+
+function initChaosFactorControls() {
   const minus = document.getElementById('chaosMinus');
   const plus = document.getElementById('chaosPlus');
 
-  function setValue(next) {
-    value.textContent = Math.min(CHAOS_MAX, Math.max(CHAOS_MIN, next));
+  async function adjust(delta) {
+    if (!activeCampaign) return;
+
+    const next = Math.min(CHAOS_MAX, Math.max(CHAOS_MIN, activeCampaign.chaos_factor + delta));
+    if (next === activeCampaign.chaos_factor) return;
+
+    const updated = await updateCampaign(activeCampaign.id, { chaos_factor: next });
+    activeCampaign = updated;
+    renderChaosFactor();
   }
 
-  minus.addEventListener('click', () => setValue(Number(value.textContent) - 1));
-  plus.addEventListener('click', () => setValue(Number(value.textContent) + 1));
+  minus.addEventListener('click', () => adjust(-1));
+  plus.addEventListener('click', () => adjust(1));
 }
 
-function init() {
+export async function setActiveCampaign(campaign) {
+  if (!campaign) {
+    activeCampaign = null;
+    localStorage.removeItem(STORAGE_KEYS.activeCampaignId);
+    renderChaosFactor();
+    renderActiveCampaignName();
+    return;
+  }
+
+  // Always re-fetch: the passed-in object (e.g. from a cached list) may be
+  // stale if the chaos factor was changed elsewhere since it was loaded.
+  const fresh = await getCampaign(campaign.id);
+  activeCampaign = fresh;
+  localStorage.setItem(STORAGE_KEYS.activeCampaignId, fresh.id);
+  renderChaosFactor();
+  renderActiveCampaignName();
+}
+
+export function getActiveCampaign() {
+  return activeCampaign;
+}
+
+async function initActiveCampaign() {
+  const savedId = localStorage.getItem(STORAGE_KEYS.activeCampaignId);
+
+  if (!savedId) {
+    renderChaosFactor();
+    renderActiveCampaignName();
+    navigateToView('campaign-management');
+    return;
+  }
+
+  try {
+    await setActiveCampaign({ id: savedId });
+  } catch {
+    await setActiveCampaign(null);
+    navigateToView('campaign-management');
+  }
+}
+
+async function init() {
   initSidebarCollapse();
   initNavRouting();
   initThemeToggle();
   initChaosFactorControls();
+  await initActiveCampaign();
 }
 
 document.addEventListener('DOMContentLoaded', init);

public/js/campaigns.js

@@ -0,0 +1,118 @@
+// Mythic Oracle — campaign management view
+
+import { getCampaigns, createCampaign, deleteCampaign, getSystems } from './api.js';
+import { setActiveCampaign, getActiveCampaign } from './app.js';
+
+const container = document.getElementById('view-campaign-management');
+
+let campaignsCache = [];
+let systemsCache = [];
+
+function escapeHtml(value) {
+  const div = document.createElement('div');
+  div.textContent = value;
+  return div.innerHTML;
+}
+
+function campaignItemHtml(campaign) {
+  const active = getActiveCampaign();
+  const isActive = Boolean(active) && active.id === campaign.id;
+
+  return `
+    <li class="campaign-item${isActive ? ' active' : ''}" data-id="${campaign.id}">
+      <button type="button" class="campaign-select" data-id="${campaign.id}">
+        <span class="campaign-name">${escapeHtml(campaign.name)}</span>
+        <span class="campaign-system">${escapeHtml(campaign.system_name)}</span>
+        ${isActive ? '<span class="campaign-active-badge">Active</span>' : ''}
+      </button>
+      <button type="button" class="campaign-delete" data-id="${campaign.id}" aria-label="Delete ${escapeHtml(campaign.name)}">&times;</button>
+    </li>
+  `;
+}
+
+function render() {
+  const systemOptions = systemsCache
+    .map((system) => `<option value="${system.id}">${escapeHtml(system.name)}</option>`)
+    .join('');
+
+  const campaignItems = campaignsCache.length
+    ? campaignsCache.map(campaignItemHtml).join('')
+    : '<li class="campaign-empty">No campaigns yet — create one below to get started.</li>';
+
+  container.innerHTML = `
+    <h2>Campaign Management</h2>
+
+    <ul class="campaign-list">
+      ${campaignItems}
+    </ul>
+
+    <form id="createCampaignForm" class="campaign-form">
+      <input type="text" id="campaignNameInput" placeholder="Campaign name" autocomplete="off" required>
+      <select id="campaignSystemSelect" required>
+        ${systemOptions}
+      </select>
+      <button type="submit">Create Campaign</button>
+    </form>
+  `;
+}
+
+async function loadAndRender() {
+  [campaignsCache, systemsCache] = await Promise.all([getCampaigns(), getSystems()]);
+  render();
+}
+
+function bindEvents() {
+  container.addEventListener('submit', async (event) => {
+    if (event.target.id !== 'createCampaignForm') return;
+    event.preventDefault();
+
+    const nameInput = document.getElementById('campaignNameInput');
+    const systemSelect = document.getElementById('campaignSystemSelect');
+    const name = nameInput.value.trim();
+    const systemId = Number(systemSelect.value);
+
+    if (!name || !systemId) return;
+
+    const campaign = await createCampaign({ name, system_id: systemId });
+    await setActiveCampaign(campaign);
+    await loadAndRender();
+  });
+
+  container.addEventListener('click', async (event) => {
+    const selectBtn = event.target.closest('.campaign-select');
+    if (selectBtn) {
+      const id = Number(selectBtn.dataset.id);
+      const campaign = campaignsCache.find((c) => c.id === id);
+      if (campaign) {
+        await setActiveCampaign(campaign);
+        render();
+      }
+      return;
+    }
+
+    const deleteBtn = event.target.closest('.campaign-delete');
+    if (deleteBtn) {
+      const id = Number(deleteBtn.dataset.id);
+      const campaign = campaignsCache.find((c) => c.id === id);
+      if (!campaign) return;
+
+      const confirmed = confirm(
+        `Delete "${campaign.name}"? This permanently removes all of its threads, NPCs, notes, and character data.`
+      );
+      if (!confirmed) return;
+
+      await deleteCampaign(id);
+      if (getActiveCampaign()?.id === id) {
+        await setActiveCampaign(null);
+      }
+      await loadAndRender();
+    }
+  });
+}
+
+function init() {
+  bindEvents();
+  loadAndRender();
+}
+
+document.addEventListener('DOMContentLoaded', init);