feat(pumpingStation): realistic defaults, ramp-foot visual fix, manual-mode visibility, dashboard example

Editor + schema defaults
- pumpingStation.html: drag-in defaults now reflect a realistic basin
  (volume=50 m³, height=4 m, inflowLevel=1.5, outflowLevel=0.2,
  overflowLevel=3.8, startLevel=1, stopLevel=0.5, minLevel=0.3,
  maxLevel=3.8). Old defaults left every level field null.

Visual bug fix
- src/editor/mode-preview.js: the level-based ramp curve in the editor
  was being drawn with foot=startLevel via buildPath(start, start, max).
  The runtime in control/levelBased.js has always used inflowLevel as
  the ramp foot. Pass buildPath(start, upFoot, max) where upFoot falls
  back to start when inflowLevel is missing, matching the runtime.

Manual mode observability
- src/specificClass.js: store last forwarded demand on this._manualDemand;
  surface as `mode` and `manualDemand` in getOutput(); call
  notifyOutputChanged() on forwardDemandToChildren and on changeMode so
  Port 0/1 emit even with no children registered. Status badge compacted
  to `mode | dir% | net m³/h` + `Qd=X m³/h` in manual mode.

Examples cleanup
- Drop stale 02-Integration.json, 03-Dashboard.json, basic-dashboard.flow.json,
  standalone-demo.js.
- 01-Basic.json: numbered driver groups (1. Control mode … 4. Calibration),
  Debug-outputs group, fixed typos and HOW-TO-USE; Port 1 debug now active.
- New 02-Dashboard.json: FlowFuse Dashboard 2.0 with Controls (7 buttons),
  Status (7 ui-text rows), Trends (4 ui-charts: level / volume / volume% /
  flow in-out-net), Raw output (ui-template dumping every Port 0 field).
  Fan-out function pattern-matches the 4-segment measurement keys by
  prefix instead of hardcoding childId, converts flow m³/s → m³/h, and
  caches last-known values so deltas never blank a row.
- examples/README.md realigned to the two-file set.

Wiki
- Home.md: 5 image placeholders replaced with the provided screenshots
  (01-node-and-editor, 02-basic-flow, 03-wiring-standalone,
  04-wiring-integrated) and the demo GIF (01-basic-demo).
- Reference-Examples.md: shipped-files table reduced to 01-Basic +
  02-Dashboard, Example-01 section uses the screenshot + GIF, Example-02
  rewritten as Dashboard (kept screenshot/GIF callouts open for those
  captures), Example-03/Integration sections + their debug-recipes row
  removed.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/editor/mode-preview.js

@@ -90,14 +90,20 @@
         return pts.join(' ');
       };
 
-      // Up curve. Foot is startLevel (the configured pump-on threshold and
-      // ramp foot per the runtime in _controlLevelBased). The OFF baseline
-      // is drawn for level < startLevel; at startLevel demand jumps from
-      // OFF to 0 % and ramps up to 100 % at maxLevel.
+      // Up curve. Engagement edge is startLevel (pump-on threshold); the
+      // ramp foot is inflowLevel — matching the runtime in
+      // _controlLevelBased, which scales demand over [inflowLevel, maxLevel].
+      // The OFF baseline is drawn for level < startLevel; between startLevel
+      // and inflowLevel demand sits flat at 0 % (system armed but not yet
+      // ramping); from inflowLevel demand ramps to 100 % at maxLevel.
       const up = document.getElementById('ps-mode-curve-up');
       const down = document.getElementById('ps-mode-curve-down');
       const downLabel = document.getElementById('ps-mode-curve-down-label');
-      if (up) up.setAttribute('points', buildPath(start, start, max));
+      // Runtime falls back to startLevel when inflowLevel is missing
+      // (basin?.inflowLevel ?? cfg.inflowLevel ?? startLevel); mirror that
+      // in the preview so the curve is still drawn instead of blank.
+      const upFoot = Number.isFinite(inlet) && inlet > start ? inlet : start;
+      if (up) up.setAttribute('points', buildPath(start, upFoot, max));
 
       // Shifted-DOWN curve (only when shift enabled): represents the
       // worst-case held-then-ramp path drawn for hold=100 % (the SVG