merged worktrees, task gkt window and gnome extension

.env.example

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+# Deskmeter Configuration
+
+# Override dmweb API port (default: auto-detect 10001, then 10000)
+# DESKMETER_PORT=10001
+
+# Example for different worktree
+# DESKMETER_PORT=10002
+
+# Window position (X,Y coordinates)
+# Example: middle of upper-right quadrant of left monitor (1920x1080)
+# WINDOW_X=1440
+# WINDOW_Y=270