Split job offers into Open and Taken-over pages

/jobangebote now lists only open offers; taken-over offers move to a
dedicated /jobangebote/uebernommen page showing which applications were
created (with link, status and date). A tab bar switches between both.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

server.js

@@ -1661,16 +1661,21 @@ initializeDatabase().then(() => {
     }
   });
 
+  // Main list: only OPEN offers (still to be decided on). Taken-over offers
+  // live on their own page (/jobangebote/uebernommen).
   app.get('/jobangebote', async (req, res) => {
     try {
       const jobangebote = await dbAll(
         `SELECT j.*, b.datum AS bewerbung_datum
          FROM jobangebote j
          LEFT JOIN bewerbungen b ON b.id = j.verknuepfte_bewerbung_id
+         WHERE j.status = 'offen'
          ORDER BY j.created_at DESC, j.id DESC`
       );
+      const uebernommenRow = await dbGet("SELECT COUNT(*) AS c FROM jobangebote WHERE status = 'uebernommen'");
       res.render('jobangebote', {
         jobangebote,
+        uebernommenCount: uebernommenRow ? uebernommenRow.c : 0,
         artOptions: ART_OPTIONS,
         statusOptions: STATUS_OPTIONS,
         hideSettings: false,
@@ -1681,6 +1686,28 @@ initializeDatabase().then(() => {
     }
   });
 
+  // Taken-over offers: which offers were turned into applications.
+  app.get('/jobangebote/uebernommen', async (req, res) => {
+    try {
+      const uebernommen = await dbAll(
+        `SELECT j.*, b.datum AS bewerbung_datum, b.status AS bewerbung_status
+         FROM jobangebote j
+         LEFT JOIN bewerbungen b ON b.id = j.verknuepfte_bewerbung_id
+         WHERE j.status = 'uebernommen'
+         ORDER BY j.updated_at DESC, j.id DESC`
+      );
+      const offenRow = await dbGet("SELECT COUNT(*) AS c FROM jobangebote WHERE status = 'offen'");
+      res.render('jobangebote_uebernommen', {
+        uebernommen,
+        offenCount: offenRow ? offenRow.c : 0,
+        hideSettings: false,
+      });
+    } catch (error) {
+      console.error('Error listing taken-over offers:', error);
+      res.status(500).send('Serverfehler');
+    }
+  });
+
   // Convert a job offer into a Bewerbung draft (mirrors the Indeed import flow:
   // creates a bewerbung with status "Entwurf", records the initial timeline entry,
   // and links the offer back to it).