R1: Dashboard 500 fix, Phase 2/7 uncommitted changes

- Fix dashboard 500 when deps disconnected — _gather_state() now returns
  full defaults instead of bare {'connected': False}
- Phase 2: FX param schemas aligned with DSP implementations
- Phase 7: Pipeline routing, preset manager improvements
- Factory presets: cleanup and normalization

Fixes dashboard crash on disconnected state (dogfood issue #1)

test_empty-drc.rpt

@@ -0,0 +1,14 @@
+** Drc report for test_empty.kicad_pcb **
+** Created on 2026-06-10T00:51:38-0400 **
+** Report includes: Errors, Warnings **
+
+** Found 1 DRC violations **
+[invalid_outline]: Board has malformed outline (no edges found on Edge.Cuts layer)
+    Local override; error
+    @(0.0000 mm, 0.0000 mm): PCB
+
+** Found 0 unconnected pads **
+
+** Found 0 Footprint errors **
+
+** End of Report **