feat: Add mobile task index with 11ty build-time data

Phase 2 of task management consolidation:

- Added _data/tasks.js - fetches tasks from Gitea API at build time
- Added tasks-index.njk - mobile-friendly task list page
- Added node-fetch dependency for API calls
- Added .gitignore for node_modules and _site

Features:
- Shows only open/blocked tasks (filters out complete)
- Priority filtering (P1/P2/P3/P4)
- Color-coded priority badges (Fire/Gold/Frost/Arcane)
- Links to Gitea for full task details
- Mobile-optimized touch targets

Access at: firefrostgaming.com/tasks-index.html

Chronicler #69

_data/tasks.js

@@ -0,0 +1,128 @@
+const fetch = (...args) => import('node-fetch').then(({default: fetch}) => fetch(...args));
+
+module.exports = async function() {
+  const GITEA_API = 'https://git.firefrostgaming.com/api/v1';
+  const REPO_OWNER = 'firefrost-gaming';
+  const REPO_NAME = 'firefrost-operations-manual';
+  const TOKEN = process.env.GITEA_TOKEN || 'e0e330cba1749b01ab505093a160e4423ebbbe36';
+  
+  const tasks = [];
+  
+  try {
+    // Get list of task directories
+    const response = await fetch(
+      `${GITEA_API}/repos/${REPO_OWNER}/${REPO_NAME}/contents/docs/tasks?ref=master`,
+      {
+        headers: {
+          'Authorization': `token ${TOKEN}`,
+          'Accept': 'application/json'
+        },
+        timeout: 30000
+      }
+    );
+    
+    if (!response.ok) {
+      console.error('Failed to fetch task list:', response.status);
+      return [];
+    }
+    
+    const dirs = await response.json();
+    const taskDirs = dirs.filter(d => d.type === 'dir' && d.name !== '_archive');
+    
+    // Fetch each task's README
+    for (const dir of taskDirs) {
+      try {
+        // Try README.md first
+        let readmePath = `docs/tasks/${dir.name}/README.md`;
+        let readmeResponse = await fetch(
+          `${GITEA_API}/repos/${REPO_OWNER}/${REPO_NAME}/contents/${encodeURIComponent(readmePath)}?ref=master`,
+          {
+            headers: {
+              'Authorization': `token ${TOKEN}`,
+              'Accept': 'application/json'
+            }
+          }
+        );
+        
+        if (!readmeResponse.ok) {
+          // Try to find any .md file
+          const filesResponse = await fetch(
+            `${GITEA_API}/repos/${REPO_OWNER}/${REPO_NAME}/contents/docs/tasks/${encodeURIComponent(dir.name)}?ref=master`,
+            {
+              headers: {
+                'Authorization': `token ${TOKEN}`,
+                'Accept': 'application/json'
+              }
+            }
+          );
+          
+          if (filesResponse.ok) {
+            const files = await filesResponse.json();
+            const mdFile = files.find(f => f.name.endsWith('.md'));
+            if (mdFile) {
+              readmePath = `docs/tasks/${dir.name}/${mdFile.name}`;
+              readmeResponse = await fetch(
+                `${GITEA_API}/repos/${REPO_OWNER}/${REPO_NAME}/contents/${encodeURIComponent(readmePath)}?ref=master`,
+                {
+                  headers: {
+                    'Authorization': `token ${TOKEN}`,
+                    'Accept': 'application/json'
+                  }
+                }
+              );
+            }
+          }
+        }
+        
+        if (readmeResponse && readmeResponse.ok) {
+          const fileData = await readmeResponse.json();
+          const content = Buffer.from(fileData.content, 'base64').toString('utf-8');
+          
+          // Parse YAML frontmatter
+          const frontmatterMatch = content.match(/^---\n([\s\S]*?)\n---/);
+          if (frontmatterMatch) {
+            const frontmatter = {};
+            frontmatterMatch[1].split('\n').forEach(line => {
+              const match = line.match(/^(\w+):\s*(.+)$/);
+              if (match) {
+                frontmatter[match[1]] = match[2].trim();
+              }
+            });
+            
+            // Extract title from first H1
+            const titleMatch = content.match(/^#\s+(.+)$/m);
+            const title = titleMatch ? titleMatch[1] : dir.name;
+            
+            tasks.push({
+              slug: dir.name,
+              title: title,
+              status: frontmatter.status || 'open',
+              priority: frontmatter.priority || 'P3',
+              owner: frontmatter.owner || 'Michael',
+              created: frontmatter.created || '2026-01-01',
+              giteaUrl: `https://git.firefrostgaming.com/${REPO_OWNER}/${REPO_NAME}/src/branch/master/docs/tasks/${encodeURIComponent(dir.name)}`
+            });
+          }
+        }
+      } catch (err) {
+        console.error(`Error processing ${dir.name}:`, err.message);
+      }
+    }
+    
+    // Sort by priority (P1 first) then by title
+    tasks.sort((a, b) => {
+      if (a.priority !== b.priority) {
+        return a.priority.localeCompare(b.priority);
+      }
+      return a.title.localeCompare(b.title);
+    });
+    
+    console.log(`[11ty] Loaded ${tasks.length} tasks from Gitea`);
+    return tasks;
+    
+  } catch (err) {
+    console.error('[11ty] Error fetching tasks:', err.message);
+    // Return empty array - page will still build, just with no tasks
+    return [];
+  }
+};