Integrate group management into sessions

.gitea/workflows/android.yaml

@@ -33,6 +33,88 @@ jobs:
           if ! command -v git >/dev/null 2>&1 || ! command -v curl >/dev/null 2>&1 || ! command -v unzip >/dev/null 2>&1; then
             install_packages git curl unzip
           fi
+
+          REF="${GITHUB_REF:-}"
+          REF_NAME="${GITHUB_REF_NAME:-}"
+          if [ -z "${REF_NAME}" ]; then
+            REF_NAME="${REF##*/}"
+          fi
+          if [ "${REF#refs/tags/v}" != "${REF}" ]; then
+            if [ -z "${CLONE_TOKEN:-}" ]; then
+              echo "Gitea release publishing requires TMUX_GITEA_TOKEN." >&2
+              exit 1
+            fi
+
+            TAG="${REF_NAME}"
+            VERSION_NAME="${TAG#v}"
+            MAJOR="$(printf '%s' "${VERSION_NAME}" | cut -d. -f1)"
+            MINOR="$(printf '%s' "${VERSION_NAME}" | cut -d. -f2)"
+            PATCH="$(printf '%s' "${VERSION_NAME}" | cut -d. -f3)"
+            VERSION_CODE=$((MAJOR * 1000000 + MINOR * 1000 + PATCH))
+            GITHUB_APK_URL="https://github.com/neatstudio/tmux-browser-android/releases/download/${TAG}/tmux-android.apk"
+
+            mkdir -p release
+            ATTEMPT=1
+            while [ "${ATTEMPT}" -le 6 ]; do
+              if curl -fsSL "${GITHUB_APK_URL}" -o release/tmux-android.apk; then
+                break
+              fi
+              rm -f release/tmux-android.apk
+              echo "Waiting for GitHub release ${TAG} (${ATTEMPT}/6)..."
+              sleep 10
+              ATTEMPT=$((ATTEMPT + 1))
+            done
+            if [ ! -s release/tmux-android.apk ]; then
+              echo "GitHub release APK unavailable for ${TAG}." >&2
+              exit 1
+            fi
+
+            SHA256="$(sha256sum release/tmux-android.apk | cut -d ' ' -f1)"
+            APK_URL="https://gitea.neatcn.com/tmux/tmux-browser-android/releases/download/${TAG}/tmux-android.apk"
+            RELEASE_PAGE_URL="https://gitea.neatcn.com/tmux/tmux-browser-android/releases/tag/${TAG}"
+            cat > release/latest.json << JSON
+            {
+              "versionCode": ${VERSION_CODE},
+              "versionName": "${VERSION_NAME}",
+              "apkUrl": "${APK_URL}",
+              "sha256": "${SHA256}",
+              "releasePageUrl": "${RELEASE_PAGE_URL}",
+              "minSdk": 26
+            }
+          JSON
+
+            API_ROOT="https://gitea.neatcn.com/api/v1/repos/tmux/tmux-browser-android"
+            RELEASE_BODY='{"tag_name":"'"${TAG}"'","target_commitish":"main","name":"tmux Android '"${VERSION_NAME}"'","body":"Android APK for tmux-ui remote testing.","draft":false,"prerelease":false}'
+            if ! curl -fsSL -X POST \
+              -H "Authorization: token ${CLONE_TOKEN}" \
+              -H "Content-Type: application/json" \
+              -d "${RELEASE_BODY}" \
+              "${API_ROOT}/releases" \
+              -o /tmp/gitea-release.json; then
+              curl -fsSL -H "Authorization: token ${CLONE_TOKEN}" \
+                "${API_ROOT}/releases/tags/${TAG}" \
+                -o /tmp/gitea-release.json
+            fi
+            RELEASE_ID="$(sed -n 's/^{"id":\([0-9][0-9]*\),.*/\1/p' /tmp/gitea-release.json | head -1)"
+            if [ -z "${RELEASE_ID}" ]; then
+              echo "Cannot resolve Gitea release id for ${TAG}." >&2
+              exit 1
+            fi
+            curl -fsSL -X POST -H "Authorization: token ${CLONE_TOKEN}" \
+              -F "attachment=@release/tmux-android.apk;type=application/vnd.android.package-archive" \
+              "${API_ROOT}/releases/${RELEASE_ID}/assets?name=tmux-android.apk" \
+              -o /tmp/gitea-apk-asset.json
+            curl -fsSL -X POST -H "Authorization: token ${CLONE_TOKEN}" \
+              -F "attachment=@release/latest.json;type=application/json" \
+              "${API_ROOT}/releases/${RELEASE_ID}/assets?name=latest.json" \
+              -o /tmp/gitea-latest-asset.json
+            echo "Mirrored GitHub release ${TAG} to Gitea."
+            echo "versionCode=${VERSION_CODE}"
+            echo "versionName=${VERSION_NAME}"
+            echo "sha256=${SHA256}"
+            exit 0
+          fi
+
           if ! command -v java >/dev/null 2>&1; then
             if command -v apk >/dev/null 2>&1; then
               install_packages openjdk17-jdk
@@ -166,7 +248,7 @@ jobs:
               "${API_ROOT}/releases/tags/${TAG}" \
               -o /tmp/gitea-release.json
           fi
-          RELEASE_ID="$(sed -n 's/.*"id":\([0-9][0-9]*\).*/\1/p' /tmp/gitea-release.json | head -1)"
+          RELEASE_ID="$(sed -n 's/^{"id":\([0-9][0-9]*\),.*/\1/p' /tmp/gitea-release.json | head -1)"
           if [ -z "${RELEASE_ID}" ]; then
             echo "Cannot resolve Gitea release id." >&2
             cat /tmp/gitea-release.json >&2

app/src/main/java/com/neatstudio/tmuxandroid/MainActivity.java

@@ -2,11 +2,11 @@ package com.neatstudio.tmuxandroid;
 
 import android.Manifest;
 import android.app.Activity;
-import android.app.AlertDialog;
 import android.app.Dialog;
 import android.content.ClipData;
 import android.content.ClipboardManager;
 import android.content.Context;
+import android.content.DialogInterface;
 import android.content.Intent;
 import android.content.SharedPreferences;
 import android.content.pm.PackageManager;
@@ -27,6 +27,7 @@ import android.text.TextUtils;
 import android.text.InputType;
 import android.text.method.LinkMovementMethod;
 import android.view.Gravity;
+import android.view.DragEvent;
 import android.view.HapticFeedbackConstants;
 import android.view.KeyEvent;
 import android.view.MotionEvent;
@@ -293,17 +294,11 @@ public final class MainActivity extends Activity {
         ScrollView scroll = new ScrollView(this);
         LinearLayout content = pageContent();
         List<String> serverUrls = savedServerUrls();
-        content.addView(createPageHeader(
+        content.addView(createServerPageHeader(serverUrls.size() + " nodes"));
-                serverUrls.size() + " nodes",
-                "Servers",
-                "＋ Add",
-                view -> promptCustomServer()
-        ));
         for (String url : serverUrls) {
             content.addView(serverProfileCard(url), spacedHeight(72, 0, 12));
         }
 
-        content.addView(createServerUtilityRow());
         scroll.addView(content);
         root.addView(scroll, new LinearLayout.LayoutParams(
                 ViewGroup.LayoutParams.MATCH_PARENT,
@@ -523,14 +518,46 @@ public final class MainActivity extends Activity {
         return header;
     }
 
-    private View createServerUtilityRow() {
+    private View createServerPageHeader(String eyebrow) {
-        LinearLayout row = new LinearLayout(this);
+        LinearLayout header = new LinearLayout(this);
-        row.setOrientation(LinearLayout.HORIZONTAL);
+        header.setOrientation(LinearLayout.HORIZONTAL);
-        row.setPadding(0, dp(4), 0, 0);
+        header.setGravity(Gravity.BOTTOM);
-        row.addView(compactButton("Probe all", view -> probeServerProfiles()));
+        header.setPadding(dp(2), dp(6), dp(2), dp(18));
-        row.addView(compactButton("Update", view -> renderUpdateScreen()));
+
-        row.addView(compactButton("More", view -> showMainNavigation()));
+        LinearLayout titleBlock = new LinearLayout(this);
-        return row;
+        titleBlock.setOrientation(LinearLayout.VERTICAL);
+        TextView eyebrowView = new TextView(this);
+        eyebrowView.setText(eyebrow.toUpperCase(java.util.Locale.ROOT));
+        eyebrowView.setTextColor(COLOR_TEXT_MUTED);
+        eyebrowView.setTextSize(10);
+        eyebrowView.setTypeface(Typeface.MONOSPACE);
+        TextView title = new TextView(this);
+        title.setText("Servers");
+        title.setTextColor(COLOR_TEXT);
+        title.setTextSize(25);
+        title.setTypeface(Typeface.DEFAULT_BOLD);
+        title.setIncludeFontPadding(false);
+        titleBlock.addView(eyebrowView);
+        titleBlock.addView(title);
+        header.addView(titleBlock, new LinearLayout.LayoutParams(0, ViewGroup.LayoutParams.WRAP_CONTENT, 1));
+
+        addHeaderTool(header, "↻", "Refresh servers", view -> probeServerProfiles());
+        addHeaderTool(header, "＋", "Add server", view -> promptCustomServer());
+        addHeaderTool(header, "⋮", "More navigation", view -> showMainNavigation());
+        return header;
+    }
+
+    private void addHeaderTool(
+            LinearLayout header,
+            String label,
+            String description,
+            View.OnClickListener action
+    ) {
+        Button button = terminalToolButton(label, action);
+        button.setContentDescription(description);
+        LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(dp(38), dp(38));
+        params.leftMargin = dp(4);
+        header.addView(button, params);
     }
 
     private View createSessionPageHeader() {
@@ -569,25 +596,11 @@ public final class MainActivity extends Activity {
         titleBlock.addView(title);
         row.addView(titleBlock, new LinearLayout.LayoutParams(0, ViewGroup.LayoutParams.WRAP_CONTENT, 1));
 
-        row.addView(primaryButton("＋ Session", view -> promptCreateSession()), new LinearLayout.LayoutParams(
+        addHeaderTool(row, "⚙", "Session display settings", view -> promptSessionSettings(""));
-                ViewGroup.LayoutParams.WRAP_CONTENT,
+        addHeaderTool(row, "↻", "Refresh sessions", view -> refreshSessions());
-                dp(38)
+        addHeaderTool(row, "＋", "Create session", view -> promptCreateSession());
-        ));
+        addHeaderTool(row, "▰", "Manage groups", view -> showGroupManagement());
         header.addView(row, matchWrap());
-
-        LinearLayout utilities = new LinearLayout(this);
-        utilities.setOrientation(LinearLayout.HORIZONTAL);
-        utilities.setGravity(Gravity.END | Gravity.CENTER_VERTICAL);
-        Button display = terminalToolButton("⚙", view -> promptSessionSettings(""));
-        display.setContentDescription("Session display settings");
-        utilities.addView(display);
-        Button refresh = compactButton("↻ Refresh", view -> refreshSessions());
-        refresh.setContentDescription("Refresh sessions");
-        utilities.addView(refresh);
-        Button addGroup = compactButton("＋ New group", view -> promptCreateKanbanProject());
-        addGroup.setContentDescription("Add group");
-        utilities.addView(addGroup);
-        header.addView(utilities, spacedMatchWrap(8, 0));
         return header;
     }
 
@@ -728,7 +741,7 @@ public final class MainActivity extends Activity {
     }
 
     private void confirmRemoveSavedServer(String url) {
-        new AlertDialog.Builder(this)
+        new AppDialogBuilder()
                 .setTitle("Remove server")
                 .setMessage("Remove " + url + " from this device?")
                 .setNegativeButton("Cancel", null)
@@ -762,12 +775,12 @@ public final class MainActivity extends Activity {
     }
 
     private void showMainNavigation() {
-        String[] items = {"Projects", "Tools", "Update", "About"};
+        String[] items = {"Sessions / groups", "Tools", "Update", "About"};
-        new AlertDialog.Builder(this)
+        new AppDialogBuilder()
                 .setTitle("tmuxctl")
                 .setItems(items, (dialog, which) -> {
                     if (which == 0) {
-                        renderProjectsScreen();
+                        openSessionPage();
                     } else if (which == 1) {
                         renderToolsScreen();
                     } else if (which == 2) {
@@ -813,7 +826,7 @@ public final class MainActivity extends Activity {
         ));
         content.addView(sectionTitle("Kanban / Messages"));
         content.addView(actionPanel(
-                actionButton("Projects", view -> showRaw("Kanban projects", () -> api.kanbanProjects())),
+                actionButton("Groups", view -> showRaw("Groups", () -> api.kanbanProjects())),
                 actionButton("New project", view -> promptCreateKanbanProject()),
                 actionButton("Delete project", view -> promptDeleteKanbanProject()),
                 actionButton("Remove session", view -> promptRemoveKanbanSession())
@@ -1027,11 +1040,15 @@ public final class MainActivity extends Activity {
 
         LinearLayout actions = new LinearLayout(this);
         actions.setOrientation(LinearLayout.HORIZONTAL);
+        actions.setGravity(Gravity.END | Gravity.CENTER_VERTICAL);
         Button copy = compactButton("Copy commands", view -> copyText("Server install", SERVER_INSTALL_COMMANDS));
-        actions.addView(copy, new LinearLayout.LayoutParams(0, dp(40), 1));
+        actions.addView(copy, new LinearLayout.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, dp(32)));
         Button add = compactButton("Add server", view -> promptCustomServer());
-        LinearLayout.LayoutParams addParams = new LinearLayout.LayoutParams(0, dp(40), 1);
+        LinearLayout.LayoutParams addParams = new LinearLayout.LayoutParams(
-        addParams.leftMargin = dp(7);
+                ViewGroup.LayoutParams.WRAP_CONTENT,
+                dp(32)
+        );
+        addParams.leftMargin = dp(5);
         actions.addView(add, addParams);
         panel.addView(actions, spacedMatchWrap(10, 0));
 
@@ -1215,7 +1232,6 @@ public final class MainActivity extends Activity {
         row.setPadding(dp(8), dp(5), dp(8), dp(5));
         row.addView(navButton(PAGE_SERVERS, selected, view -> renderServerScreen()));
         row.addView(navButton(PAGE_SESSIONS, selected, view -> openSessionPage()));
-        row.addView(navButton(PAGE_PROJECTS, selected, view -> renderProjectsScreen()));
         row.addView(navButton(PAGE_TOOLS, selected, view -> renderToolsScreen()));
         row.addView(navButton(PAGE_UPDATE, selected, view -> renderUpdateScreen()));
         row.addView(navButton(PAGE_ABOUT, selected, view -> renderAboutScreen()));
@@ -1294,28 +1310,40 @@ public final class MainActivity extends Activity {
     }
 
     private LinearLayout actionPanel(Button... buttons) {
+        final int columns = 3;
         LinearLayout panel = new LinearLayout(this);
         panel.setOrientation(LinearLayout.VERTICAL);
-        panel.setPadding(dp(6), dp(6), dp(6), dp(1));
+        panel.setPadding(dp(4), dp(4), dp(4), 0);
         panel.setBackground(panelBackground());
         LinearLayout row = null;
         for (int index = 0; index < buttons.length; index++) {
-            if (index % 2 == 0) {
+            if (index % columns == 0) {
                 row = new LinearLayout(this);
                 row.setOrientation(LinearLayout.HORIZONTAL);
                 panel.addView(row, matchWrap());
             }
-            LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(0, dp(38), 1);
+            LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(0, dp(32), 1);
-            params.leftMargin = dp(3);
+            params.leftMargin = dp(2);
-            params.rightMargin = dp(3);
+            params.rightMargin = dp(2);
-            params.bottomMargin = dp(6);
+            params.bottomMargin = dp(4);
+            buttons[index].setTextSize(9);
+            buttons[index].setPadding(dp(4), 0, dp(4), 0);
             row.addView(buttons[index], params);
         }
+        int remainder = buttons.length % columns;
+        if (row != null && remainder != 0) {
+            for (int index = remainder; index < columns; index++) {
+                LinearLayout.LayoutParams spacerParams = new LinearLayout.LayoutParams(0, dp(32), 1);
+                spacerParams.leftMargin = dp(2);
+                spacerParams.rightMargin = dp(2);
+                row.addView(new View(this), spacerParams);
+            }
+        }
         LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(
                 ViewGroup.LayoutParams.MATCH_PARENT,
                 ViewGroup.LayoutParams.WRAP_CONTENT
         );
-        params.bottomMargin = dp(8);
+        params.bottomMargin = dp(6);
         panel.setLayoutParams(params);
         return panel;
     }
@@ -1456,6 +1484,7 @@ public final class MainActivity extends Activity {
     private View sessionGroupSection(String name, List<SessionSummary> sessions, boolean project) {
         LinearLayout section = new LinearLayout(this);
         section.setOrientation(LinearLayout.VERTICAL);
+        section.setOnDragListener((view, event) -> handleSessionDrop(section, name, project, event));
 
         LinearLayout heading = new LinearLayout(this);
         heading.setOrientation(LinearLayout.HORIZONTAL);
@@ -1478,6 +1507,10 @@ public final class MainActivity extends Activity {
         count.setTextSize(11);
         count.setTypeface(Typeface.MONOSPACE);
         heading.addView(count);
+        Button actions = terminalToolButton("⋮", view -> showGroupActions(name, project));
+        actions.setContentDescription("Actions for " + name);
+        heading.addView(new View(this), new LinearLayout.LayoutParams(0, 1, 1));
+        heading.addView(actions);
         section.addView(heading);
 
         if (sessions.isEmpty()) {
@@ -1489,13 +1522,79 @@ public final class MainActivity extends Activity {
             section.addView(empty, matchWrap());
         } else {
             for (SessionSummary session : sessions) {
-                section.addView(sessionRow(session), spacedMatchWrap(0, 10));
+                section.addView(sessionRow(session, project ? name : null), spacedMatchWrap(0, 10));
             }
         }
 
         return section;
     }
 
+    private boolean handleSessionDrop(
+            LinearLayout section,
+            String targetGroup,
+            boolean targetIsGroup,
+            DragEvent event
+    ) {
+        if (!(event.getLocalState() instanceof SessionDrag)) {
+            return false;
+        }
+        if (event.getAction() == DragEvent.ACTION_DRAG_ENTERED) {
+            section.setBackground(rounded(COLOR_CARD_ALT, 8, COLOR_ACCENT, 1));
+            return true;
+        }
+        if (event.getAction() == DragEvent.ACTION_DRAG_EXITED
+                || event.getAction() == DragEvent.ACTION_DRAG_ENDED) {
+            section.setBackgroundColor(Color.TRANSPARENT);
+            return true;
+        }
+        if (event.getAction() == DragEvent.ACTION_DROP) {
+            section.setBackgroundColor(Color.TRANSPARENT);
+            SessionDrag drag = (SessionDrag) event.getLocalState();
+            moveSessionBetweenGroups(drag.sessionName, drag.sourceGroup, targetIsGroup ? targetGroup : null);
+            return true;
+        }
+        return true;
+    }
+
+    private void showGroupActions(String groupName, boolean project) {
+        String[] items = project
+                ? new String[]{"Add session", "Messages", "Delete group"}
+                : new String[]{"Create group", "Refresh sessions"};
+        new AppDialogBuilder()
+                .setTitle(groupName)
+                .setItems(items, (dialog, which) -> {
+                    if (!project) {
+                        if (which == 0) {
+                            promptCreateKanbanProject();
+                        } else {
+                            refreshSessions();
+                        }
+                    } else if (which == 0) {
+                        promptAddKanbanSessionToProject(groupName);
+                    } else if (which == 1) {
+                        showRaw("Group messages: " + groupName, () -> api.groupMessages(groupName));
+                    } else {
+                        runApiAction("Delete group", () -> api.deleteKanbanProject(groupName));
+                    }
+                })
+                .show();
+    }
+
+    private void showGroupManagement() {
+        new AppDialogBuilder()
+                .setTitle("Groups")
+                .setItems(new String[]{"Create group", "Delete group", "Group messages"}, (dialog, which) -> {
+                    if (which == 0) {
+                        promptCreateKanbanProject();
+                    } else if (which == 1) {
+                        promptDeleteKanbanProject();
+                    } else {
+                        promptGroupMessages();
+                    }
+                })
+                .show();
+    }
+
     private void refreshProjects() {
         if (projectList != null) {
             projectList.removeAllViews();
@@ -1643,7 +1742,7 @@ public final class MainActivity extends Activity {
             list.addView(empty);
         }
         for (SessionSummary session : sessions) {
-            list.addView(sessionRow(session), spacedMatchWrap(0, 10));
+            list.addView(sessionRow(session, null), spacedMatchWrap(0, 10));
         }
         if (sessionSummaryText != null) {
             sessionSummaryText.setText("Server: " + getServerUrl() + "\nSessions: " + sessions.size());
@@ -1651,7 +1750,7 @@ public final class MainActivity extends Activity {
         setStatus("Loaded " + sessions.size() + " sessions");
     }
 
-    private View sessionRow(SessionSummary session) {
+    private View sessionRow(SessionSummary session, String sourceGroup) {
         LinearLayout row = new LinearLayout(this);
         row.setOrientation(LinearLayout.HORIZONTAL);
         row.setGravity(Gravity.CENTER_VERTICAL);
@@ -1661,7 +1760,13 @@ public final class MainActivity extends Activity {
         row.setOnClickListener(view -> openTerminal(session.name));
         row.setOnLongClickListener(view -> {
             view.performHapticFeedback(HapticFeedbackConstants.LONG_PRESS);
-            showSessionActions(session.name);
+            ClipData data = ClipData.newPlainText("tmux-session", session.name);
+            view.startDragAndDrop(
+                    data,
+                    new View.DragShadowBuilder(view),
+                    new SessionDrag(session.name, sourceGroup),
+                    0
+            );
             return true;
         });
 
@@ -1715,7 +1820,7 @@ public final class MainActivity extends Activity {
         row.addView(textBlock, new LinearLayout.LayoutParams(0, ViewGroup.LayoutParams.WRAP_CONTENT, 1));
 
         Button move = terminalToolButton("⇄", view -> promptAddKanbanSession(session.name));
-        move.setContentDescription("Move " + session.name + " to project");
+        move.setContentDescription("Move " + session.name + " to group");
         row.addView(move);
         Button kill = terminalToolButton("×", view -> confirmKill(session.name));
         kill.setContentDescription("Kill session");
@@ -1829,7 +1934,7 @@ public final class MainActivity extends Activity {
     }
 
     private void confirmKill(String sessionName) {
-        new AlertDialog.Builder(this)
+        new AppDialogBuilder()
                 .setTitle("Kill session")
                 .setMessage("Kill tmux session \"" + sessionName + "\"?")
                 .setNegativeButton("Cancel", null)
@@ -3013,7 +3118,103 @@ public final class MainActivity extends Activity {
     }
 
     private void promptAddKanbanSession(String sessionName) {
-        promptText("Add to kanban project", "project", "", projectName -> api.addKanbanSession(projectName, sessionName));
+        progressBar.setVisibility(View.VISIBLE);
+        executor.execute(() -> {
+            try {
+                List<String> groups = kanbanGroupNames(api.kanbanProjects());
+                runOnUiThread(() -> {
+                    progressBar.setVisibility(View.GONE);
+                    List<String> choices = new ArrayList<>();
+                    choices.add("Ungrouped");
+                    choices.addAll(groups);
+                    choices.add("＋ Create new group");
+                    new AppDialogBuilder()
+                            .setTitle("Move " + sessionName)
+                            .setItems(choices.toArray(new String[0]), (dialog, which) -> {
+                                if (which == 0) {
+                                    moveSessionToGroup(sessionName, null);
+                                } else if (which == choices.size() - 1) {
+                                    promptCreateGroupForSession(sessionName);
+                                } else {
+                                    moveSessionToGroup(sessionName, choices.get(which));
+                                }
+                            })
+                            .show();
+                });
+            } catch (Exception error) {
+                runOnUiThread(() -> {
+                    progressBar.setVisibility(View.GONE);
+                    showMessage("Group load failed: " + error.getMessage());
+                });
+            }
+        });
+    }
+
+    private List<String> kanbanGroupNames(String projectsText) throws Exception {
+        List<String> groups = new ArrayList<>();
+        JSONObject object = new JSONObject(projectsText == null || projectsText.isEmpty() ? "{}" : projectsText);
+        JSONArray projects = object.optJSONArray("projects");
+        for (int index = 0; projects != null && index < projects.length(); index++) {
+            JSONObject project = projects.optJSONObject(index);
+            if (project != null && !project.optString("name").isEmpty()) {
+                groups.add(project.optString("name"));
+            }
+        }
+        return groups;
+    }
+
+    private void promptCreateGroupForSession(String sessionName) {
+        promptText("Create group for " + sessionName, "group name", "", groupName -> {
+            if (groupName.isEmpty()) {
+                throw new IllegalArgumentException("Group name is required");
+            }
+            api.createKanbanProject(groupName, "~", "");
+            api.addKanbanSession(groupName, sessionName);
+        });
+    }
+
+    private void moveSessionToGroup(String sessionName, String targetGroup) {
+        runApiAction("Move session", () -> {
+            JSONObject object = new JSONObject(api.kanbanProjects());
+            JSONArray projects = object.optJSONArray("projects");
+            boolean alreadyInTarget = false;
+            for (int projectIndex = 0; projects != null && projectIndex < projects.length(); projectIndex++) {
+                JSONObject project = projects.optJSONObject(projectIndex);
+                if (project == null) {
+                    continue;
+                }
+                String projectName = project.optString("name");
+                JSONArray agents = project.optJSONArray("agents");
+                for (int agentIndex = 0; agents != null && agentIndex < agents.length(); agentIndex++) {
+                    if (!sessionName.equals(agentSessionName(agents.optJSONObject(agentIndex)))) {
+                        continue;
+                    }
+                    if (projectName.equals(targetGroup)) {
+                        alreadyInTarget = true;
+                    } else {
+                        api.removeKanbanSession(projectName, sessionName, false);
+                    }
+                }
+            }
+            if (targetGroup != null && !alreadyInTarget) {
+                api.addKanbanSession(targetGroup, sessionName);
+            }
+        });
+    }
+
+    private void moveSessionBetweenGroups(String sessionName, String sourceGroup, String targetGroup) {
+        if ((sourceGroup == null && targetGroup == null)
+                || (sourceGroup != null && sourceGroup.equals(targetGroup))) {
+            return;
+        }
+        runApiAction("Move session", () -> {
+            if (sourceGroup != null) {
+                api.removeKanbanSession(sourceGroup, sessionName, false);
+            }
+            if (targetGroup != null) {
+                api.addKanbanSession(targetGroup, sessionName);
+            }
+        });
     }
 
     private void promptAddKanbanSessionToProject(String projectName) {
@@ -3025,7 +3226,7 @@ public final class MainActivity extends Activity {
         EditText project = formField(form, "Project", "");
         EditText agent = formField(form, "Agent/session name", "");
         EditText kill = formField(form, "Kill too: true or false", "false");
-        new AlertDialog.Builder(this)
+        new AppDialogBuilder()
                 .setTitle("Remove kanban session")
                 .setView(form)
                 .setNegativeButton("Cancel", null)
@@ -3345,7 +3546,7 @@ public final class MainActivity extends Activity {
         EditText body = formField(form, "Message", "");
         body.setMinLines(3);
         body.setSingleLine(false);
-        new AlertDialog.Builder(this)
+        new AppDialogBuilder()
                 .setTitle("Send group message")
                 .setView(form)
                 .setNegativeButton("Cancel", null)
@@ -3366,7 +3567,7 @@ public final class MainActivity extends Activity {
         LinearLayout form = formRoot();
         EditText project = formField(form, "Project", "");
         EditText message = formField(form, "Message ID", "");
-        new AlertDialog.Builder(this)
+        new AppDialogBuilder()
                 .setTitle("Scan group message")
                 .setView(form)
                 .setNegativeButton("Cancel", null)
@@ -3391,7 +3592,7 @@ public final class MainActivity extends Activity {
         EditText body = formField(form, "Body", "");
         body.setMinLines(2);
         body.setSingleLine(false);
-        new AlertDialog.Builder(this)
+        new AppDialogBuilder()
                 .setTitle("Post hook event")
                 .setView(form)
                 .setNegativeButton("Cancel", null)
@@ -3410,7 +3611,7 @@ public final class MainActivity extends Activity {
         LinearLayout form = formRoot();
         EditText session = formField(form, "Session optional", "");
         EditText url = formField(form, "Image URL", "");
-        new AlertDialog.Builder(this)
+        new AppDialogBuilder()
                 .setTitle("Upload image URL")
                 .setView(form)
                 .setNegativeButton("Cancel", null)
@@ -3427,7 +3628,7 @@ public final class MainActivity extends Activity {
         EditText session = new EditText(this);
         session.setSingleLine(true);
         session.setHint("session optional");
-        new AlertDialog.Builder(this)
+        new AppDialogBuilder()
                 .setTitle("Upload image file")
                 .setView(session)
                 .setNegativeButton("Cancel", null)
@@ -3453,7 +3654,7 @@ public final class MainActivity extends Activity {
         LinearLayout form = formRoot();
         EditText path = formField(form, "Path", "");
         EditText basePath = formField(form, "Base path optional", "");
-        new AlertDialog.Builder(this)
+        new AppDialogBuilder()
                 .setTitle("Image preview info")
                 .setView(form)
                 .setNegativeButton("Cancel", null)
@@ -3470,7 +3671,7 @@ public final class MainActivity extends Activity {
         LinearLayout form = formRoot();
         EditText path = formField(form, "Path", "");
         EditText basePath = formField(form, "Base path optional", "");
-        new AlertDialog.Builder(this)
+        new AppDialogBuilder()
                 .setTitle("Open image preview")
                 .setView(form)
                 .setNegativeButton("Cancel", null)
@@ -3505,7 +3706,7 @@ public final class MainActivity extends Activity {
         text.append('\n');
         text.append(permissionSummary());
 
-        new AlertDialog.Builder(this)
+        new AppDialogBuilder()
                 .setTitle("Permissions / update")
                 .setMessage(text.toString())
                 .setNegativeButton("Close", null)
@@ -3543,7 +3744,7 @@ public final class MainActivity extends Activity {
                 "Preview manual: " + BuildConfig.DEFAULT_PREVIEW_UPDATE_URL,
                 "Custom URL"
         };
-        new AlertDialog.Builder(this)
+        new AppDialogBuilder()
                 .setTitle("Update source")
                 .setItems(items, (dialog, which) -> {
                     if (which == 0) {
@@ -3678,7 +3879,7 @@ public final class MainActivity extends Activity {
                     image.setImageBitmap(bitmap);
                     image.setAdjustViewBounds(true);
                     image.setPadding(dp(8), dp(8), dp(8), dp(8));
-                    new AlertDialog.Builder(this)
+                    new AppDialogBuilder()
                             .setTitle("Image preview")
                             .setView(image)
                             .setPositiveButton("Close", null)
@@ -3716,7 +3917,7 @@ public final class MainActivity extends Activity {
         input.setHint(hint);
         input.setText(value);
         input.setSelectAllOnFocus(true);
-        new AlertDialog.Builder(this)
+        new AppDialogBuilder()
                 .setTitle(title)
                 .setView(input)
                 .setNegativeButton("Cancel", null)
@@ -3774,7 +3975,7 @@ public final class MainActivity extends Activity {
         ScrollView scroll = new ScrollView(this);
         TextView content = new TextView(this);
         content.setText(text == null || text.isEmpty() ? "(empty)" : text);
-        content.setTextColor(Color.rgb(20, 24, 30));
+        content.setTextColor(COLOR_TEXT);
         content.setTextSize(12);
         content.setTypeface(Typeface.MONOSPACE);
         content.setTextIsSelectable(true);
@@ -3783,13 +3984,150 @@ public final class MainActivity extends Activity {
                 ViewGroup.LayoutParams.MATCH_PARENT,
                 ViewGroup.LayoutParams.WRAP_CONTENT
         ));
-        new AlertDialog.Builder(this)
+        new AppDialogBuilder()
                 .setTitle(title)
                 .setView(scroll)
                 .setPositiveButton("Close", null)
                 .show();
     }
 
+    private final class AppDialogBuilder {
+        private String title = "";
+        private String message;
+        private View content;
+        private String[] items;
+        private DialogInterface.OnClickListener itemAction;
+        private String negativeLabel;
+        private DialogInterface.OnClickListener negativeAction;
+        private String neutralLabel;
+        private DialogInterface.OnClickListener neutralAction;
+        private String positiveLabel;
+        private DialogInterface.OnClickListener positiveAction;
+
+        AppDialogBuilder setTitle(String value) {
+            title = value;
+            return this;
+        }
+
+        AppDialogBuilder setMessage(String value) {
+            message = value;
+            return this;
+        }
+
+        AppDialogBuilder setView(View value) {
+            content = value;
+            return this;
+        }
+
+        AppDialogBuilder setItems(String[] values, DialogInterface.OnClickListener action) {
+            items = values;
+            itemAction = action;
+            return this;
+        }
+
+        AppDialogBuilder setNegativeButton(String label, DialogInterface.OnClickListener action) {
+            negativeLabel = label;
+            negativeAction = action;
+            return this;
+        }
+
+        AppDialogBuilder setNeutralButton(String label, DialogInterface.OnClickListener action) {
+            neutralLabel = label;
+            neutralAction = action;
+            return this;
+        }
+
+        AppDialogBuilder setPositiveButton(String label, DialogInterface.OnClickListener action) {
+            positiveLabel = label;
+            positiveAction = action;
+            return this;
+        }
+
+        Dialog show() {
+            Dialog dialog = new Dialog(MainActivity.this);
+            LinearLayout sheet = bottomSheetContent(dialog, title, dialogSubtitle());
+            if (message != null) {
+                TextView body = bodyText(message);
+                body.setTextSize(12);
+                body.setTextIsSelectable(true);
+                body.setPadding(dp(2), dp(4), dp(2), dp(8));
+                sheet.addView(body, matchWrap());
+            }
+            if (content != null) {
+                LinearLayout.LayoutParams contentParams = matchWrap();
+                contentParams.bottomMargin = dp(10);
+                sheet.addView(content, contentParams);
+            }
+            if (items != null) {
+                for (int index = 0; index < items.length; index++) {
+                    final int selected = index;
+                    Button choice = toolbarButton(items[index], view -> {
+                        dialog.dismiss();
+                        if (itemAction != null) {
+                            itemAction.onClick(dialog, selected);
+                        }
+                    });
+                    choice.setGravity(Gravity.START | Gravity.CENTER_VERTICAL);
+                    choice.setTextSize(11);
+                    LinearLayout.LayoutParams choiceParams = matchWrap();
+                    choiceParams.height = dp(42);
+                    choiceParams.bottomMargin = dp(6);
+                    sheet.addView(choice, choiceParams);
+                }
+            }
+            addDialogActions(dialog, sheet);
+            showBottomSheet(dialog, sheet, null);
+            return dialog;
+        }
+
+        private String dialogSubtitle() {
+            if (items != null) {
+                return "Choose an option";
+            }
+            if (content != null) {
+                return "Complete the fields below";
+            }
+            return "Confirm this action";
+        }
+
+        private void addDialogActions(Dialog dialog, LinearLayout sheet) {
+            if (negativeLabel == null && neutralLabel == null && positiveLabel == null) {
+                return;
+            }
+            LinearLayout actions = new LinearLayout(MainActivity.this);
+            actions.setOrientation(LinearLayout.HORIZONTAL);
+            actions.setGravity(Gravity.END | Gravity.CENTER_VERTICAL);
+            addDialogAction(actions, dialog, neutralLabel, neutralAction, DialogInterface.BUTTON_NEUTRAL, false);
+            addDialogAction(actions, dialog, negativeLabel, negativeAction, DialogInterface.BUTTON_NEGATIVE, false);
+            addDialogAction(actions, dialog, positiveLabel, positiveAction, DialogInterface.BUTTON_POSITIVE,
+                    "Remove".equals(positiveLabel) || "Kill".equals(positiveLabel) || "Delete".equals(positiveLabel));
+            sheet.addView(actions, spacedMatchWrap(4, 0));
+        }
+
+        private void addDialogAction(
+                LinearLayout actions,
+                Dialog dialog,
+                String label,
+                DialogInterface.OnClickListener action,
+                int which,
+                boolean danger
+        ) {
+            if (label == null) {
+                return;
+            }
+            Button button = compactButton(label, view -> {
+                dialog.dismiss();
+                if (action != null) {
+                    action.onClick(dialog, which);
+                }
+            });
+            if (danger) {
+                button.setTextColor(COLOR_DANGER);
+            }
+            actions.addView(button);
+        }
+    }
+
     private LinearLayout formRoot() {
         LinearLayout form = new LinearLayout(this);
         form.setOrientation(LinearLayout.VERTICAL);
@@ -5130,6 +5468,16 @@ public final class MainActivity extends Activity {
         void onValue(int value);
     }
 
+    private static final class SessionDrag {
+        final String sessionName;
+        final String sourceGroup;
+
+        SessionDrag(String sessionName, String sourceGroup) {
+            this.sessionName = sessionName;
+            this.sourceGroup = sourceGroup;
+        }
+    }
+
     private static final class SheetAction {
         final String icon;
         final String title;