Add touch-down and long-press input detection

Implement touch-down event detection to provide immediate visual feedback when touching list items, mirroring button navigation behavior. Add long-press detection (500ms threshold) to distinguish between tap and hold gestures. Apply touch-down selection updates to file browser, home menu, and recent books activities.

src/activities/home/FileBrowserActivity.cpp

@@ -206,6 +206,14 @@ void FileBrowserActivity::loop() {
   const int pathReserved = renderer.getLineHeight(SMALL_FONT_ID) + UITheme::getInstance().getMetrics().verticalSpacing;
   const int pageItems = UITheme::getNumberOfItemsPerPage(renderer, true, false, true, false, pathReserved);
 
+  // Touch-down moves the selector to the pressed entry (shows selected state); release
+  // opens it below.
+  int downId = -1;
+  if (mappedInput.wasItemTouchedDown(downId) && downId >= 0 && downId < static_cast<int>(files.size())) {
+    selectorIndex = downId;
+    requestUpdate();
+  }
+
   // A tap opens the tapped entry (held-time is 0 on a tap, so it takes the short-press
   // open path below, never the long-press delete).
   int tappedId = -1;

src/activities/home/HomeActivity.cpp

@@ -183,6 +183,14 @@ void HomeActivity::loop() {
   // menu-local ids (it is drawn with selectorIndex offset by recentBooks.size()),
   // so map the tapped id back into the global selector space. (The recent-book
   // cover is a separate, single-item draw path — tappable in a later phase.)
+  // Touch-down moves the selector to the pressed menu button (shows selected state),
+  // like Up/Down; release opens it below.
+  int downId = -1;
+  if (mappedInput.wasItemTouchedDown(downId)) {
+    selectorIndex = static_cast<int>(recentBooks.size()) + downId;
+    requestUpdate();
+  }
+
   int tappedId = -1;
   const bool tapped = mappedInput.wasItemTapped(tappedId);
   if (tapped) {

src/activities/home/RecentBooksActivity.cpp

@@ -63,6 +63,12 @@ void RecentBooksActivity::loop() {
     return;
   }
 
+  int downId = -1;
+  if (mappedInput.wasItemTouchedDown(downId) && downId >= 0 && downId < static_cast<int>(recentBooks.size())) {
+    selectorIndex = downId;
+    requestUpdate();
+  }
+
   int tappedId = -1;
   const bool tapped = mappedInput.wasItemTapped(tappedId);
   if (tapped && tappedId >= 0 && tappedId < static_cast<int>(recentBooks.size())) selectorIndex = tappedId;

src/activities/network/CalibreConnectActivity.cpp

@@ -4,13 +4,13 @@
 #include <GfxRenderer.h>
 #include <I18n.h>
 #include <WiFi.h>
-#include <esp_task_wdt.h>
 
 #include "MappedInputManager.h"
 #include "SilentRestart.h"
 #include "WifiSelectionActivity.h"
 #include "components/UITheme.h"
 #include "fontIds.h"
+#include "network/TaskWatchdog.h"
 
 namespace {
 constexpr const char* HOSTNAME = "crosspoint";
@@ -110,12 +110,12 @@ void CalibreConnectActivity::loop() {
       LOG_DBG("CAL", "WARNING: %lu ms gap since last handleClient", timeSinceLastHandleClient);
     }
 
-    esp_task_wdt_reset();
+    feedTaskWatchdog();
     constexpr int MAX_ITERATIONS = 80;
     for (int i = 0; i < MAX_ITERATIONS && webServer->isRunning(); i++) {
       webServer->handleClient();
       if ((i & 0x07) == 0x07) {
-        esp_task_wdt_reset();
+        feedTaskWatchdog();
       }
       if ((i & 0x0F) == 0x0F) {
         yield();

src/activities/network/CrossPointWebServerActivity.cpp

@@ -5,7 +5,6 @@
 #include <GfxRenderer.h>
 #include <I18n.h>
 #include <WiFi.h>
-#include <esp_task_wdt.h>
 
 #include <cstddef>
 
@@ -16,6 +15,7 @@
 #include "activities/network/CalibreConnectActivity.h"
 #include "components/UITheme.h"
 #include "fontIds.h"
+#include "network/TaskWatchdog.h"
 #include "util/QrUtils.h"
 
 namespace {
@@ -328,7 +328,7 @@ void CrossPointWebServerActivity::loop() {
       }
 
       // Reset watchdog BEFORE processing - HTTP header parsing can be slow
-      esp_task_wdt_reset();
+      feedTaskWatchdog();
 
       // Process HTTP requests in tight loop for maximum throughput
       // More iterations = more data processed per main loop cycle
@@ -337,7 +337,7 @@ void CrossPointWebServerActivity::loop() {
         webServer->handleClient();
         // Reset watchdog every 32 iterations
         if ((i & 0x1F) == 0x1F) {
-          esp_task_wdt_reset();
+          feedTaskWatchdog();
         }
         // Yield and check for exit button every 64 iterations
         if ((i & 0x3F) == 0x3F) {

src/activities/network/NetworkModeSelectionActivity.cpp

@@ -30,6 +30,12 @@ void NetworkModeSelectionActivity::loop() {
     return;
   }
 
+  int downId = -1;
+  if (mappedInput.wasItemTouchedDown(downId) && downId >= 0 && downId < static_cast<int>(MENU_ITEM_COUNT)) {
+    selectedIndex = downId;
+    requestUpdate();
+  }
+
   // Handle confirm button (or a tap) - select current option
   int tappedId = -1;
   const bool tapped = mappedInput.wasItemTapped(tappedId);

src/activities/network/WifiSelectionActivity.cpp

@@ -409,6 +409,19 @@ void WifiSelectionActivity::loop() {
 
   // Handle network list state
   if (state == WifiSelectionState::NETWORK_LIST) {
+    // Touch: down-select highlights the pressed network, tap selects it (like Confirm).
+    int downId = -1;
+    if (mappedInput.wasItemTouchedDown(downId) && downId >= 0 && downId < static_cast<int>(networks.size())) {
+      selectedNetworkIndex = downId;
+      requestUpdate();
+    }
+    int tappedId = -1;
+    if (mappedInput.wasItemTapped(tappedId) && tappedId >= 0 && tappedId < static_cast<int>(networks.size())) {
+      selectedNetworkIndex = tappedId;
+      selectNetwork(selectedNetworkIndex);
+      return;
+    }
+
     // Check for Back button to exit (cancel)
     if (mappedInput.wasPressed(MappedInputManager::Button::Back)) {
       onComplete(false);

src/activities/reader/EpubReaderBookmarksActivity.cpp

@@ -103,6 +103,14 @@ void EpubReaderBookmarksActivity::loop() {
     }
   }
 
+  if (confirmingDelete < DELETE_MODE_DISPLAY) {
+    int downId = -1;
+    if (mappedInput.wasItemTouchedDown(downId) && downId >= 0 && downId < static_cast<int>(bookmarks.size())) {
+      selectorIndex = downId;
+      requestUpdate();
+    }
+  }
+
   int tappedId = -1;
   const bool tapped = (confirmingDelete < DELETE_MODE_DISPLAY) && mappedInput.wasItemTapped(tappedId);
   if (tapped && tappedId >= 0 && tappedId < static_cast<int>(bookmarks.size())) selectorIndex = tappedId;

src/activities/reader/EpubReaderChapterSelectionActivity.cpp

@@ -31,6 +31,12 @@ void EpubReaderChapterSelectionActivity::loop() {
   const int pageItems = UITheme::getInstance().getNumberOfItemsPerPage(renderer, true, false, true, false);
   const int totalItems = getTotalItems();
 
+  int downId = -1;
+  if (mappedInput.wasItemTouchedDown(downId) && downId >= 0 && downId < totalItems) {
+    selectorIndex = downId;
+    requestUpdate();
+  }
+
   int tappedId = -1;
   const bool tapped = mappedInput.wasItemTapped(tappedId);
   if (tapped && tappedId >= 0 && tappedId < totalItems) selectorIndex = tappedId;

src/activities/reader/EpubReaderMenuActivity.cpp

@@ -57,6 +57,14 @@ void EpubReaderMenuActivity::loop() {
     requestUpdate();
   });
 
+  // Touch-down moves the selection to the pressed item (shows selected state), like
+  // moving with Up/Down; release activates it below.
+  int downId = -1;
+  if (mappedInput.wasItemTouchedDown(downId) && downId >= 0 && downId < static_cast<int>(menuItems.size())) {
+    selectedIndex = downId;
+    requestUpdate();
+  }
+
   // A tap selects the item and activates it in one gesture (falls into Confirm below).
   int tappedId = -1;
   const bool tapped = mappedInput.wasItemTapped(tappedId);

src/activities/settings/FontSelectionActivity.cpp

@@ -54,6 +54,12 @@ void FontSelectionActivity::loop() {
     return;
   }
 
+  int downId = -1;
+  if (mappedInput.wasItemTouchedDown(downId) && downId >= 0) {
+    selectedIndex_ = downId;
+    requestUpdate();
+  }
+
   int tappedId = -1;
   if (mappedInput.wasItemTapped(tappedId) && tappedId >= 0) {
     selectedIndex_ = tappedId;

src/activities/settings/LanguageSelectActivity.cpp

@@ -32,6 +32,12 @@ void LanguageSelectActivity::loop() {
     return;
   }
 
+  int downId = -1;
+  if (mappedInput.wasItemTouchedDown(downId) && downId >= 0) {
+    selectedIndex = downId;
+    requestUpdate();
+  }
+
   int tappedId = -1;
   if (mappedInput.wasItemTapped(tappedId) && tappedId >= 0) {
     selectedIndex = tappedId;

src/activities/settings/OpdsServerListActivity.cpp

@@ -41,6 +41,12 @@ void OpdsServerListActivity::loop() {
     return;
   }
 
+  int downId = -1;
+  if (mappedInput.wasItemTouchedDown(downId) && downId >= 0) {
+    selectedIndex = downId;
+    requestUpdate();
+  }
+
   int tappedId = -1;
   if (mappedInput.wasItemTapped(tappedId) && tappedId >= 0) {
     selectedIndex = tappedId;

src/activities/settings/SettingsActivity.cpp

@@ -118,6 +118,14 @@ void SettingsActivity::loop() {
   // A tap on a settings row selects + activates it in one gesture. The list is drawn
   // with selectedIndex = selectedSettingIndex - 1 (row 0 is the category tab), so map
   // the tapped 0-based row back by +1. (Category tab bar is tappable in a later phase.)
+  // Touch-down moves the selection to the pressed row (shows selected state); release
+  // toggles/activates it below. (Row 0 is the tab bar, so settings list id 0 -> index 1.)
+  int downId = -1;
+  if (mappedInput.wasItemTouchedDown(downId) && downId >= 0 && downId < settingsCount) {
+    selectedSettingIndex = downId + 1;
+    requestUpdate();
+  }
+
   int tappedId = -1;
   if (mappedInput.wasItemTapped(tappedId) && tappedId >= 0 && tappedId < settingsCount) {
     selectedSettingIndex = tappedId + 1;
@@ -133,6 +141,7 @@ void SettingsActivity::loop() {
     selectedCategoryIndex = tabId;
     selectedSettingIndex = 0;
     hasChangedCategory = true;
+    requestUpdate();
   }
 
   // Handle actions with early return

src/activities/util/ConfirmationActivity.cpp

@@ -3,6 +3,7 @@
 #include <I18n.h>
 
 #include "HalDisplay.h"
+#include "components/TouchRegistry.h"
 #include "components/UITheme.h"
 
 ConfirmationActivity::ConfirmationActivity(GfxRenderer& renderer, MappedInputManager& mappedInput,
@@ -46,8 +47,26 @@ void ConfirmationActivity::render(RenderLock&& lock) {
   // Draw Body
   if (!safeBody.empty()) {
     renderer.drawCenteredText(fontId, currentY, safeBody.c_str(), true, EpdFontFamily::REGULAR);
+    currentY += lineHeight;
   }
 
+  // On-screen Cancel / Confirm buttons (also tappable). The footer hints below map
+  // the same actions to Left/Right for button devices, but on touch-only devices
+  // the hints are hidden, so these are the only affordance.
+  const int btnH = lineHeight + 20;
+  const int totalW = renderer.getScreenWidth() - margin * 2;
+  const int btnW = (totalW - spacing) / 2;
+  const int btnY = currentY + spacing * 3;
+  const Rect cancelRect{margin, btnY, btnW, btnH};
+  const Rect confirmRect{margin + btnW + spacing, btnY, btnW, btnH};
+  renderer.drawRect(cancelRect.x, cancelRect.y, cancelRect.width, cancelRect.height);
+  renderer.drawRect(confirmRect.x, confirmRect.y, confirmRect.width, confirmRect.height);
+  const int btnTextY = btnY + (btnH - lineHeight) / 2;
+  UITheme::drawCenteredText(renderer, cancelRect, fontId, btnTextY, I18N.get(StrId::STR_CANCEL));
+  UITheme::drawCenteredText(renderer, confirmRect, fontId, btnTextY, I18N.get(StrId::STR_CONFIRM));
+  TouchRegistry::getInstance().add(cancelRect, 0, TouchRegistry::Item);
+  TouchRegistry::getInstance().add(confirmRect, 1, TouchRegistry::Item);
+
   // Draw UI Elements
   const auto labels = mappedInput.mapLabels("", "", I18N.get(StrId::STR_CANCEL), I18N.get(StrId::STR_CONFIRM));
   GUI.drawButtonHints(renderer, labels.btn1, labels.btn2, labels.btn3, labels.btn4);
@@ -56,6 +75,16 @@ void ConfirmationActivity::render(RenderLock&& lock) {
 }
 
 void ConfirmationActivity::loop() {
+  // Tap the on-screen buttons: id 1 = Confirm, id 0 = Cancel.
+  int tappedId = -1;
+  if (mappedInput.wasItemTapped(tappedId)) {
+    ActivityResult res;
+    res.isCancelled = (tappedId != 1);
+    setResult(std::move(res));
+    finish();
+    return;
+  }
+
   if (mappedInput.wasReleased(MappedInputManager::Button::Right)) {
     ActivityResult res;
     res.isCancelled = false;

src/activities/util/KeyboardEntryActivity.cpp

@@ -337,13 +337,24 @@ void KeyboardEntryActivity::loop() {
     }
   }
 
-  // A tap selects the key and presses it in one gesture. Encoded id = row*100+col
-  // (bottom function row = getContentRowCount()). Skipped in cursor mode, where a
-  // tap on a key would be ambiguous with cursor editing.
+  // A tap selects the key and presses it. Encoded id = row*100+col (bottom function
+  // row = getContentRowCount()). A touch-and-hold inserts the alternate character
+  // (numbers/symbols on a letter), mirroring the button long-press — wasItemLongPressed
+  // is checked first since it's a subset of wasItemTapped's releases. Skipped in
+  // cursor mode, where a tap on a key would be ambiguous with cursor editing.
   int tappedKey = -1;
   if (!cursorMode && mappedInput.wasItemTapped(tappedKey)) {
     selectedRow = tappedKey / 100;
     selectedCol = tappedKey % 100;
+    int longKey = -1;
+    if (mappedInput.wasItemLongPressed(longKey)) {
+      const char alt = getAlternativeChar();
+      if (alt != '\0') {
+        insertChar(alt);
+        requestUpdate();
+        return;
+      }
+    }
     if (handleKeyPress()) {
       requestUpdate();
     }