Chord: add Acme left+right = Paste

The paste chord (Acme 1-3) now works: with the left button held, a right tap
pastes over the selection via edit_paste (standard KDE clipboard). This is
conflict-free because the radial gesture is already suppressed while the left
button is held — right alone opens the radial, right while left-held pastes.
The paired right release is swallowed so it doesn't leak a context menu or
other action. All 5 ctest suites green.

docs/PLAN.md

@@ -128,20 +128,18 @@ Therefore the palette is replaced, not extended, and the replacement is built on
 - Not yet done: free-form stroke gestures (only button-press gesture so far);
   user-file config loading (built-in default only); frecency.
 
-### Mouse chording (Acme-style) — DONE (first increment)
-- Left+middle chord = **Cut**: with the left button held while selecting
-  (button 1 anchor), a tap of the middle button (button 2) cuts the current
-  selection via `edit_cut`, which uses the **standard KDE clipboard**
-  (Klipper-backed), not the X11 primary selection.
-- **Middle-click primary paste is suppressed** inside the editor. Kate pastes
-  the primary selection on the middle event; the filter consumes the middle
-  button on **both press and release** (swallowing only the press let the paste
-  leak through on release). So middle-click no longer pastes in the editor —
-  paste is the normal `Ctrl+V` / palette paste from the KDE clipboard.
-- Right-button chords are intentionally **not** ported — the right button is the
-  radial gesture. (Revisit later.)
-- The radial gesture is suppressed while the left button is held, so an RMB tap
-  mid-selection (or during a left+middle chord) does not pop the radial.
+### Mouse chording (Acme-style) — DONE
+- Left-button chords (button 1 held while selecting is the anchor):
+  **left + middle = Cut**, **left + right = Paste**. Both use `edit_cut` /
+  `edit_paste` → the **standard KDE clipboard** (Klipper-backed), not the X11
+  primary selection.
+- The right-button paste chord is free of conflict because the radial gesture is
+  already suppressed while the left button is held: right alone = radial, right
+  while left-held = paste.
+- **Middle-click primary paste is suppressed** inside the editor — the middle
+  button is consumed on both press and release (the paste fires on release, so
+  swallowing only the press leaked it). Paste in the editor is the KDE-clipboard
+  paste (`Ctrl+V`, palette, or the left+right chord).
 
 ### M5 — Command vocabulary + project model + switchers — NEXT
 - `:`-verb pack via `KTextEditor::Command`: `sort`, `align`, `json`, `b64`,

src/plugin/ollieplugin.cpp

@@ -347,13 +347,14 @@ bool OllieView::eventFilter(QObject *obj, QEvent *event)
         }
     }
 
-    // Acme-style left+middle chord = Cut, and suppression of X11 primary-
-    // selection paste. Middle-button events inside the view are consumed on
-    // BOTH press and release (Kate pastes the primary selection on the middle
-    // event; swallowing only the press lets the paste leak through on release).
-    // When the left button is held, the middle tap cuts the current selection
-    // via edit_cut, which uses the standard KDE clipboard (Klipper-backed).
-    // Right-button chords are intentionally not ported (RMB is the radial).
+    // Acme-style left-button chords, plus suppression of X11 primary-selection
+    // paste. Button 1 (left) held while selecting is the anchor:
+    //   left + middle tap = Cut, left + right tap = Paste.
+    // Both use edit_cut / edit_paste, which use the standard KDE clipboard
+    // (Klipper-backed). The right-button chord is free because the radial
+    // gesture is already suppressed while the left button is held. Middle-button
+    // events in the view are consumed on BOTH press and release to kill the
+    // middle-click primary paste (it fires on release, not just press).
     if (event->type() == QEvent::MouseButtonRelease) {
         auto *mev = static_cast<QMouseEvent *>(event);
         if (mev->button() == Qt::LeftButton) {
@@ -363,12 +364,25 @@ bool OllieView::eventFilter(QObject *obj, QEvent *event)
             m_swallowMiddleRelease = false;
             return true; // suppress the primary paste that fires on release
         }
+        if (mev->button() == Qt::RightButton && m_swallowRightRelease) {
+            m_swallowRightRelease = false;
+            return true; // paired release of a paste chord
+        }
     } else if (event->type() == QEvent::MouseButtonPress) {
         auto *mev = static_cast<QMouseEvent *>(event);
         KTextEditor::View *v = m_mainWindow->activeView();
         auto *w = qobject_cast<QWidget *>(obj);
         const bool inView = v && w && v->isAncestorOf(w);
 
+        // left + right tap = Paste over the selection.
+        if (mev->button() == Qt::RightButton && m_leftDownInView && inView) {
+            if (QAction *paste = findActionByName(QStringLiteral("edit_paste"))) {
+                paste->trigger();
+            }
+            m_swallowRightRelease = true;
+            return true; // consume: chord, not a radial / context menu
+        }
+
         if (mev->button() == Qt::MiddleButton && inView) {
             if (m_leftDownInView) {
                 if (QAction *cut = findActionByName(QStringLiteral("edit_cut"))) {

src/plugin/ollieplugin.h

@@ -91,6 +91,7 @@ private:
     bool m_gestureActive = false;     // an RMB drag gesture is in progress
     bool m_leftDownInView = false;    // LMB held inside the view (Acme chord anchor)
     bool m_swallowMiddleRelease = false; // swallow the release paired with a consumed middle press
+    bool m_swallowRightRelease = false;  // swallow the release paired with a left+right paste chord
     QHash<QString, QPointer<QAction>> m_actionsById;
 };