feat: add Kropáček Ondřej + May–Jul feature work (half-cell marks, copy/paste, exports, roles)

New worker: Kropáček Ondřej (TKB, part-time student) inserted between
Dvořák Václav and Vondrák Pavel in data.json, the full-month Excel
template (new row 13, everything below shifted) and the docházka
template (13 person rows). Not added to the harmonogram/CIS roster —
he has no CIS personal number.

Also checkpoints the uncommitted work deployed to production between
May and July 2026:
- half-cell day/night preference marks (color + text per half)
- cell copy/paste (Ctrl+C/V, context menu), incl. from info rows
- light/dark theme toggle, TKB people filter, 162 filter
- full-month Excel export (template) and harmonogram export for CIS
- docházka export: half-time workers, retired flag, contractor handling
- third login role "cis" (viewer + export access)
- retired flag hides a person from UI/FPD while keeping past data

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

web/server.js

@@ -194,9 +194,103 @@ app.get('/api/files/:id', (req, res) => {
   }
 })
 
-// Export file as Excel (not yet implemented for TKB format)
-app.get('/api/files/:id/export-excel', (_req, res) => {
-  res.status(501).json({ error: 'Excel export not yet implemented for TKB format' })
+// Export full schedule Excel for a given month
+app.get('/api/files/:id/export-excel', async (req, res) => {
+  const { id } = req.params
+  const month = parseInt(req.query.month) || (new Date().getMonth() + 1)
+  const year  = parseInt(req.query.year)  || new Date().getFullYear()
+
+  const filePath = join(SCHEDULES_DIR, `${id}.json`)
+  if (!existsSync(filePath)) return res.status(404).json({ error: 'File not found' })
+
+  let fileData
+  try { fileData = JSON.parse(readFileSync(filePath, 'utf8')) }
+  catch { return res.status(500).json({ error: 'Failed to read file' }) }
+
+  const input = JSON.stringify({ schedule: fileData.data, month, year })
+  const scriptPath = join(__dirname, 'export_full_excel.py')
+
+  try {
+    const { spawn } = await import('child_process')
+    await new Promise((resolve, reject) => {
+      const chunks = []
+      const errChunks = []
+      const proc = spawn('python3', [scriptPath], { cwd: __dirname })
+      proc.stdout.on('data', d => chunks.push(d))
+      proc.stderr.on('data', d => errChunks.push(d))
+      proc.on('close', code => {
+        if (code !== 0) {
+          const errMsg = Buffer.concat(errChunks).toString()
+          console.error('export_full_excel error:', errMsg)
+          res.status(500).json({ error: errMsg })
+          reject(new Error(errMsg))
+        } else {
+          const xlsx = Buffer.concat(chunks)
+          const MONTH_NAMES = ['','Leden','Únor','Březen','Duben','Květen','Červen','Červenec','Srpen','Září','Říjen','Listopad','Prosinec']
+          const mm = String(month).padStart(2, '0')
+          const fname = `Pohotovost_TKB+IT_smeny_${year}_${mm}_${MONTH_NAMES[month]}.xlsx`
+          res.setHeader('Content-Type', 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet')
+          res.setHeader('Content-Disposition', `attachment; filename*=UTF-8''${encodeURIComponent(fname)}`)
+          res.send(xlsx)
+          resolve()
+        }
+      })
+      proc.on('error', reject)
+      proc.stdin.write(input)
+      proc.stdin.end()
+    })
+  } catch (err) {
+    if (!res.headersSent) res.status(500).json({ error: String(err) })
+  }
+})
+
+// Export harmonogram Excel for a given month (import into attendance system)
+app.get('/api/files/:id/export-harmonogram', async (req, res) => {
+  const { id } = req.params
+  const month = parseInt(req.query.month) || (new Date().getMonth() + 1)
+  const year  = parseInt(req.query.year)  || new Date().getFullYear()
+
+  const filePath = join(SCHEDULES_DIR, `${id}.json`)
+  if (!existsSync(filePath)) return res.status(404).json({ error: 'File not found' })
+
+  let fileData
+  try { fileData = JSON.parse(readFileSync(filePath, 'utf8')) }
+  catch { return res.status(500).json({ error: 'Failed to read file' }) }
+
+  const input = JSON.stringify({ schedule: fileData.data, month, year })
+  const scriptPath = join(__dirname, 'export_harmonogram.py')
+
+  try {
+    const { spawn } = await import('child_process')
+    await new Promise((resolve, reject) => {
+      const chunks = []
+      const errChunks = []
+      const proc = spawn('python3', [scriptPath], { cwd: __dirname })
+      proc.stdout.on('data', d => chunks.push(d))
+      proc.stderr.on('data', d => errChunks.push(d))
+      proc.on('close', code => {
+        if (code !== 0) {
+          const errMsg = Buffer.concat(errChunks).toString()
+          console.error('export_harmonogram error:', errMsg)
+          if (!res.headersSent) res.status(500).json({ error: errMsg })
+          reject(new Error(errMsg))
+        } else {
+          const xlsx = Buffer.concat(chunks)
+          const mm = String(month).padStart(2, '0')
+          const fname = `import_harmonogram_${year}_${mm}.xlsx`
+          res.setHeader('Content-Type', 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet')
+          res.setHeader('Content-Disposition', `attachment; filename*=UTF-8''${encodeURIComponent(fname)}`)
+          res.send(xlsx)
+          resolve()
+        }
+      })
+      proc.on('error', reject)
+      proc.stdin.write(input)
+      proc.stdin.end()
+    })
+  } catch (err) {
+    if (!res.headersSent) res.status(500).json({ error: 'Export failed', details: err.message })
+  }
 })
 
 // Export docházka Excel for a given month