feat(scheduler): Variablen-Badges theme-aware + neue Variablen nodes_online, version

- Badge-Styling: bg-secondary-subtle/text-secondary-emphasis statt bg-secondary
  → lesbar in Light- und Dark-Mode
- {nodes_online}: Nodes < 15 Min last_seen (DB-Abfrage in get_stats())
- {version}: Bot-Version aus config.yaml via config.get()
Closes #15.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

CHANGELOG.md

@@ -1,5 +1,15 @@
 # Changelog
 
+## [0.08.13] - 2026-02-20
+
+### Added
+- **Scheduler: neue Template-Variablen** (closes #15):
+  - `{nodes_online}` – Nodes mit `last_seen < 15 Min` (Live-Status, analog Dashboard-Schwellwert)
+  - `{version}` – aktuelle Bot-Version aus `config.yaml`
+- **Scheduler Variablen-Badges theme-aware**: Badge-Klasse von `bg-secondary` auf
+  `bg-secondary-subtle text-secondary-emphasis border-secondary-subtle` umgestellt –
+  korrekte Lesbarkeit in Hell- und Dunkel-Theme.
+
 ## [0.08.12] - 2026-02-20
 
 ### Changed

config.yaml

@@ -1,4 +1,4 @@
-version: "0.08.12"
+version: "0.08.13"
 
 bot:
   name: "MeshDD-Bot"

meshbot/database.py

@@ -207,6 +207,10 @@ class Database:
             "SELECT COUNT(*) FROM nodes WHERE last_seen >= ?", (day_ago,)
         ) as c:
             stats["nodes_24h"] = (await c.fetchone())[0]
+        async with self.db.execute(
+            "SELECT COUNT(*) FROM nodes WHERE last_seen >= ?", (now - 900,)
+        ) as c:
+            stats["nodes_online"] = (await c.fetchone())[0]
         async with self.db.execute(
             "SELECT COUNT(*) FROM commands WHERE timestamp >= ?", (day_ago,)
         ) as c:

meshbot/scheduler.py

@@ -5,6 +5,8 @@ from datetime import datetime
 
 import yaml
 
+from meshbot import config
+
 logger = logging.getLogger(__name__)
 
 SCHEDULER_PATH = os.path.join(os.path.dirname(os.path.dirname(__file__)), "scheduler.yaml")
@@ -101,6 +103,8 @@ class Scheduler:
             "{weekday}":      weekdays[now.weekday()],
             "{nodes}":        str(stats.get("total_nodes", "?")),
             "{nodes_24h}":    str(stats.get("nodes_24h", "?")),
+            "{nodes_online}": str(stats.get("nodes_online", "?")),
+            "{version}":      config.get("version", "?"),
         }
         for key, val in replacements.items():
             text = text.replace(key, val)

static/js/scheduler.js

@@ -14,6 +14,8 @@ const MSG_VARS = [
     { key: '{weekday}',      label: '{weekday}',      desc: 'Wochentag (Montag…)' },
     { key: '{nodes}',        label: '{nodes}',        desc: 'Anzahl Nodes gesamt' },
     { key: '{nodes_24h}',    label: '{nodes_24h}',    desc: 'Aktive Nodes (24h)' },
+    { key: '{nodes_online}', label: '{nodes_online}', desc: 'Nodes online (< 15 Min)' },
+    { key: '{version}',      label: '{version}',      desc: 'Bot-Version' },
 ];
 
 // Type toggle label + variable hints
@@ -25,7 +27,7 @@ function updateCommandLabel() {
     const badges = document.getElementById('varBadges');
     if (isMsg) {
         badges.innerHTML = MSG_VARS.map(v =>
-            `<span class="badge bg-secondary me-1 mb-1" role="button" title="${escapeHtml(v.desc)}" data-var="${escapeHtml(v.key)}" style="cursor:pointer;font-size:.7rem">${escapeHtml(v.label)}</span>`
+            `<span class="badge bg-secondary-subtle text-secondary-emphasis border border-secondary-subtle me-1 mb-1" role="button" title="${escapeHtml(v.desc)}" data-var="${escapeHtml(v.key)}" style="cursor:pointer;font-size:.7rem">${escapeHtml(v.label)}</span>`
         ).join('');
         hints.classList.remove('d-none');
     } else {