Move terminal key pager into composer

.gitea/workflows/android.yaml

@@ -6,9 +6,13 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-      - name: Build APK
+      - name: Build Android APK
         env:
           CLONE_TOKEN: ${{ secrets.TMUX_GITEA_TOKEN }}
+          ANDROID_KEYSTORE_BASE64: ${{ secrets.ANDROID_KEYSTORE_BASE64 }}
+          ANDROID_KEYSTORE_PASSWORD: ${{ secrets.ANDROID_KEYSTORE_PASSWORD }}
+          ANDROID_KEY_ALIAS: ${{ secrets.ANDROID_KEY_ALIAS }}
+          ANDROID_KEY_PASSWORD: ${{ secrets.ANDROID_KEY_PASSWORD }}
         run: |
           set -eu
 
@@ -26,8 +30,12 @@ jobs:
           rm -rf "${WORKDIR}"
           SERVER_URL="${GITHUB_SERVER_URL:-https://gitea.neatcn.com}"
           REPOSITORY="${GITHUB_REPOSITORY:-tmux/tmux-browser-android}"
+          if [ -n "${CLONE_TOKEN:-}" ]; then
             AUTH_SERVER_URL="$(printf '%s' "${SERVER_URL}" | sed "s#https://#https://gouki:${CLONE_TOKEN}@#")"
             git clone "${AUTH_SERVER_URL}/${REPOSITORY}.git" "${WORKDIR}"
+          else
+            git clone "${SERVER_URL}/${REPOSITORY}.git" "${WORKDIR}"
+          fi
           cd "${WORKDIR}"
           git checkout "${GITHUB_SHA:-main}"
 
@@ -53,15 +61,105 @@ jobs:
           yes | sdkmanager --licenses >/dev/null || true
           sdkmanager "platforms;android-35" "build-tools;35.0.0" "platform-tools"
 
+          REF="${GITHUB_REF:-}"
+          REF_NAME="${GITHUB_REF_NAME:-}"
+          if [ -z "${REF_NAME}" ]; then
+            REF_NAME="${REF##*/}"
+          fi
+          PUBLISH_RELEASE=0
+          if [ "${REF#refs/tags/v}" != "${REF}" ]; then
+            PUBLISH_RELEASE=1
+            VERSION_NAME="${REF_NAME#v}"
+            MAJOR="$(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))
+          else
             VERSION_NAME="0.1.${GITHUB_RUN_NUMBER:-0}"
-          VERSION_CODE=$((2000 + ${GITHUB_RUN_NUMBER:-0}))
-          gradle :app:assembleDebug \
+            VERSION_CODE=$((3000 + ${GITHUB_RUN_NUMBER:-0}))
+          fi
+
+          SIGNED=false
+          if [ -n "${ANDROID_KEYSTORE_BASE64:-}" ]; then
+            echo "${ANDROID_KEYSTORE_BASE64}" | base64 -d > release.jks
+            {
+              echo "storeFile=release.jks"
+              echo "storePassword=${ANDROID_KEYSTORE_PASSWORD}"
+              echo "keyAlias=${ANDROID_KEY_ALIAS}"
+              echo "keyPassword=${ANDROID_KEY_PASSWORD}"
+            } > signing.properties
+            SIGNED=true
+          fi
+
+          if [ "${PUBLISH_RELEASE}" = "1" ] && [ "${SIGNED}" != "true" ]; then
+            echo "Gitea release publishing requires ANDROID_KEYSTORE_BASE64 and signing secrets." >&2
+            exit 1
+          fi
+          if [ "${PUBLISH_RELEASE}" = "1" ] && [ -z "${CLONE_TOKEN:-}" ]; then
+            echo "Gitea release publishing requires TMUX_GITEA_TOKEN." >&2
+            exit 1
+          fi
+
+          if [ "${SIGNED}" = "true" ]; then
+            BUILD_TASK=":app:assembleRelease"
+          else
+            BUILD_TASK=":app:assembleDebug"
+          fi
+          gradle "${BUILD_TASK}" \
             -PversionCode="${VERSION_CODE}" \
             -PversionName="${VERSION_NAME}" \
             -PrepoSlug="neatstudio/tmux-browser-android"
 
           mkdir -p release
           APK_PATH="$(find app/build/outputs/apk -name '*.apk' | sort | tail -n 1)"
-          cp "${APK_PATH}" release/tmux-android-gitea.apk
-          ls -lh release/tmux-android-gitea.apk
-          sha256sum release/tmux-android-gitea.apk
+          cp "${APK_PATH}" release/tmux-android.apk
+          cp "${APK_PATH}" "release/tmux-android-${VERSION_NAME}.apk"
+          SHA256="$(sha256sum release/tmux-android.apk | awk '{print $1}')"
+          TAG="v${VERSION_NAME}"
+          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": "${RELEASE_PAGE_URL}",
+            "minSdk": 26
+          }
+          JSON
+          ls -lh release/tmux-android.apk release/latest.json
+          sha256sum release/tmux-android.apk
+
+          if [ "${PUBLISH_RELEASE}" != "1" ]; then
+            echo "Gitea main build completed as compile check."
+            exit 0
+          fi
+
+          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." >&2
+            cat /tmp/gitea-release.json >&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 "Published Gitea release ${TAG}."

.github/workflows/android.yml

@@ -2,8 +2,6 @@ name: Android APK
 
 on:
   push:
-    branches:
-      - main
     tags:
       - "v*"
   pull_request:
@@ -27,10 +25,12 @@ jobs:
         run: |
           if [[ "${GITHUB_REF}" == refs/tags/v* ]]; then
             VERSION_NAME="${GITHUB_REF_NAME#v}"
+            IFS='.' read -r MAJOR MINOR PATCH <<< "${VERSION_NAME}"
+            VERSION_CODE=$((MAJOR * 1000000 + MINOR * 1000 + PATCH))
           else
             VERSION_NAME="0.1.${GITHUB_RUN_NUMBER}"
-          fi
             VERSION_CODE=$((1000 + GITHUB_RUN_NUMBER))
+          fi
           echo "VERSION_NAME=${VERSION_NAME}" >> "${GITHUB_ENV}"
           echo "VERSION_CODE=${VERSION_CODE}" >> "${GITHUB_ENV}"
 

README.md

@@ -26,7 +26,10 @@ APIs directly:
   display
 - mobile soft-key row for tmux-oriented input, including tmux prefix, detach,
   new window, previous/next window, Ctrl keys, arrows, page keys, and paste
-- automatic update checks against the selected release manifest
+- terminal viewport resize based on the phone's visible text area, including
+  keyboard height changes, so tmux output wraps at the same width the user sees
+- automatic update checks with Gitea first and GitHub fallback, plus manual
+  source-specific checks
 - one-download-per-version APK cache, SHA-256 verification, and installer
   handoff
 - native Update and About pages for version/build type, protocol, permission,
@@ -85,22 +88,32 @@ base64 -w 0 tmux-android-release.jks
 Branch builds and manual workflow runs create Actions artifacts only. Use them
 to verify grouped changes before publishing.
 
-Publish a release build by pushing a `v*` tag. A tag should be reserved for a
-coherent feature/test batch, not every small UI or text change. Tag publishing
-creates a GitHub Release with:
+Gitea is the primary build and update channel. Normal `main` pushes run the
+Gitea Android workflow for compile checks, while GitHub no longer builds every
+main push. Publish a release build by pushing a `v*` tag after a coherent
+feature/test batch, not every small UI or text change.
+
+Tag publishing can create GitHub Release assets with:
 
 ```text
 https://github.com/neatstudio/tmux-browser-android/releases/latest/download/tmux-android.apk
 https://github.com/neatstudio/tmux-browser-android/releases/latest/download/latest.json
 ```
 
-Gitea is the app's default install/update channel because phones may not be able
-to reach GitHub reliably. GitHub remains an optional public source. This Gitea
-instance does not support the GitHub-style `/releases/latest/download/...` URL,
-so the app uses the Gitea Release API as the stable Gitea update entrypoint.
+Gitea is also the app's default install/update channel because phones may not be
+able to reach GitHub reliably. GitHub remains an optional public source. This
+Gitea instance does not support the GitHub-style
+`/releases/latest/download/...` URL, so the app uses the Gitea Release API as
+the stable Gitea update entrypoint.
 
-Plain branch builds only create Actions artifacts; they are useful for CI
-verification, but releases are the stable download/update channel.
+Release APKs on GitHub and Gitea should either be the exact same file or be
+built from the same tag with the same signing keystore, `versionCode`, and
+`versionName`. The Gitea workflow publishes release assets only when signing
+secrets are present. Unsigned Gitea builds remain compile checks and must not be
+used for automatic in-place updates.
+
+Plain branch builds are useful for CI verification, but releases are the stable
+download/update channel.
 
 Unsigned/debug workflow artifacts are useful only for smoke testing install and
 launch. Automatic in-place updates require release APKs signed with the same
@@ -111,18 +124,16 @@ incompatible package.
 
 The terminal screen connects to `/ws/terminal` and sends the upstream protocol
 messages unchanged: `attach`, `input`, `resize`, `scroll`, and `clear-history`.
-The first Android UI renders terminal output as monospace text with basic ANSI
-SGR color support. The terminal view stays bottom-aligned when output is short,
-auto-scrolls as data arrives, and adjusts its bottom inset when the soft keyboard
-opens. Rendering is throttled and the local terminal buffer is capped so opening
-busy sessions does not block the UI thread. Input typed before the terminal
-attach message is sent is queued and flushed after the WebSocket client is ready.
-It is enough for shell-oriented remote testing, but it is not yet a complete
-xterm-compatible renderer for full-screen TUIs such as `vim` or `top`.
+The Android UI renders terminal output through a lightweight screen buffer with
+cursor movement, line clearing, screen clearing, basic ANSI SGR color support,
+and throttled redraws. It is enough for shell-oriented remote testing, but it is
+not yet a complete xterm-compatible renderer for full-screen TUIs such as `vim`
+or `top`.
 
-The terminal toolbar and shortcut row include tmux prefix helpers. The app sends
-the same control bytes a keyboard would send, for example `Ctrl+B`, `Ctrl+B d`,
-`Ctrl+B c`, `Ctrl+B n`, and `Ctrl+B p`.
+The terminal input area is a native multi-line composer with a paged accessory
+bar for editing keys, control keys, tmux prefix helpers, navigation keys, and
+common shell symbols. The app sends the same control bytes a keyboard would
+send, for example `Ctrl+B`, `Ctrl+B d`, `Ctrl+B c`, `Ctrl+B n`, and `Ctrl+B p`.
 
 All app features are native Android controls. Complex server objects such as
 preferences, timeline events, group messages, and image metadata currently use
@@ -161,9 +172,19 @@ manifest is:
 https://github.com/neatstudio/tmux-browser-android/releases/latest/download/latest.json
 ```
 
-The app checks only the selected update source. It does not probe GitHub and
-Gitea during the same update check. Choose the source in the app's `Update`
-page, or use a custom manifest/API URL.
+The app has four update checks on the `Update` page:
+
+- `Auto check` tries Gitea first, then tries GitHub only if Gitea cannot be
+  reached.
+- `Gitea` checks only the public Gitea release API.
+- `GitHub` checks only the public GitHub manifest.
+- `Selected` checks the source chosen with `Source`, including a custom
+  manifest/API URL.
+
+Each source retries transient network failures before that source is considered
+failed. The `APK` and `Release page` buttons still resolve from the selected
+source, so they can be forced to Gitea on phones that cannot reliably reach
+GitHub.
 
 Gitea tag-specific assets are also public, for example:
 
@@ -174,8 +195,9 @@ https://gitea.neatcn.com/tmux/tmux-browser-android/releases/download/v0.1.7/tmux
 
 In the app:
 
-- Open the `Update` page to check `latest.json`, download the APK, verify
-  SHA-256, and open Android's installer.
+- Open the `Update` page and tap `Auto check` to check `latest.json`, download
+  the APK, verify SHA-256, and open Android's installer. Use `Gitea`, `GitHub`,
+  or `Selected` to force a single update source.
 - If the same version APK was already downloaded and its SHA-256 still matches,
   the app reuses that file instead of downloading it again.
 - If Android sends you to the unknown-app install permission screen, return to

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

@@ -0,0 +1,647 @@
+package com.neatstudio.tmuxandroid;
+
+import android.graphics.Color;
+import android.graphics.Typeface;
+import android.text.SpannableStringBuilder;
+import android.text.Spanned;
+import android.text.style.BackgroundColorSpan;
+import android.text.style.ForegroundColorSpan;
+import android.text.style.StyleSpan;
+
+import java.util.ArrayList;
+import java.util.List;
+
+final class TerminalScreenBuffer {
+    private static final int DEFAULT_FG = 0xffe6ebf2;
+    private static final int DEFAULT_BG = Color.TRANSPARENT;
+
+    private int cols;
+    private int rows;
+    private Cell[][] cells;
+    private int cursorRow;
+    private int cursorCol;
+    private int savedRow;
+    private int savedCol;
+    private String pendingControl = "";
+    private boolean wrapPending;
+    private int fg = DEFAULT_FG;
+    private int bg = DEFAULT_BG;
+    private boolean bold;
+
+    TerminalScreenBuffer(int cols, int rows) {
+        resize(cols, rows);
+    }
+
+    void resize(int nextCols, int nextRows) {
+        nextCols = Math.max(1, nextCols);
+        nextRows = Math.max(1, nextRows);
+        Cell[][] previous = cells;
+        int previousRows = rows;
+        int previousCols = cols;
+        cols = nextCols;
+        rows = nextRows;
+        cells = new Cell[rows][cols];
+        for (int row = 0; row < rows; row++) {
+            for (int col = 0; col < cols; col++) {
+                cells[row][col] = new Cell();
+            }
+        }
+        if (previous != null) {
+            int copyRows = Math.min(previousRows, rows);
+            int copyCols = Math.min(previousCols, cols);
+            int previousStart = Math.max(0, previousRows - copyRows);
+            int nextStart = Math.max(0, rows - copyRows);
+            for (int row = 0; row < copyRows; row++) {
+                for (int col = 0; col < copyCols; col++) {
+                    cells[nextStart + row][col].copyFrom(previous[previousStart + row][col]);
+                }
+            }
+        }
+        cursorRow = clamp(cursorRow, 0, rows - 1);
+        cursorCol = clamp(cursorCol, 0, cols - 1);
+        savedRow = clamp(savedRow, 0, rows - 1);
+        savedCol = clamp(savedCol, 0, cols - 1);
+    }
+
+    void clear() {
+        clearScreen();
+        cursorRow = 0;
+        cursorCol = 0;
+        savedRow = 0;
+        savedCol = 0;
+        pendingControl = "";
+        wrapPending = false;
+        fg = DEFAULT_FG;
+        bg = DEFAULT_BG;
+        bold = false;
+    }
+
+    void write(String text) {
+        if (!pendingControl.isEmpty()) {
+            text = pendingControl + text;
+            pendingControl = "";
+        }
+        int index = 0;
+        while (index < text.length()) {
+            char item = text.charAt(index);
+            if (item == '\u001b') {
+                int next = handleEscape(text, index);
+                if (next < 0) {
+                    pendingControl = text.substring(index);
+                    return;
+                }
+                index = next;
+            } else if (item == '\r') {
+                wrapPending = false;
+                cursorCol = 0;
+                index++;
+            } else if (item == '\n') {
+                wrapPending = false;
+                newLine();
+                index++;
+            } else if (item == '\b') {
+                wrapPending = false;
+                cursorCol = Math.max(0, cursorCol - 1);
+                index++;
+            } else if (item == '\t') {
+                int nextTab = ((cursorCol / 8) + 1) * 8;
+                while (cursorCol < Math.min(nextTab, cols)) {
+                    putChar(' ');
+                }
+                index++;
+            } else if (isNakedDeviceAttributesTail(text, index)) {
+                index = skipNakedDeviceAttributesTail(text, index);
+            } else if (item >= 0x20 && item != 0x7f) {
+                putChar(item);
+                index++;
+            } else {
+                index++;
+            }
+        }
+    }
+
+    CharSequence render() {
+        SpannableStringBuilder output = new SpannableStringBuilder();
+        for (int row = 0; row < rows; row++) {
+            appendRow(output, row);
+            if (row + 1 < rows) {
+                output.append('\n');
+            }
+        }
+        return output;
+    }
+
+    private int handleEscape(String text, int index) {
+        if (index + 1 >= text.length()) {
+            return -1;
+        }
+        char next = text.charAt(index + 1);
+        wrapPending = false;
+        if (next == '[') {
+            int end = findAnsiEnd(text, index + 2);
+            if (end == -1) {
+                return -1;
+            }
+            applyCsi(text.substring(index + 2, end), text.charAt(end));
+            return end + 1;
+        }
+        if (next == ']') {
+            return skipStringEscape(text, index + 2);
+        }
+        if (next == 'P' || next == '^' || next == '_') {
+            return skipStringEscape(text, index + 2);
+        }
+        if (next == '(' || next == ')' || next == '*' || next == '+' || next == '-' || next == '.') {
+            if (index + 2 >= text.length()) {
+                return -1;
+            }
+            return Math.min(index + 3, text.length());
+        }
+        if (next == '7') {
+            saveCursor();
+        } else if (next == '8') {
+            restoreCursor();
+        } else if (next == 'D') {
+            newLine();
+        } else if (next == 'E') {
+            cursorCol = 0;
+            newLine();
+        } else if (next == 'M') {
+            reverseIndex();
+        } else if (next == 'c') {
+            clear();
+        }
+        return Math.min(index + 2, text.length());
+    }
+
+    private void applyCsi(String rawParams, char command) {
+        wrapPending = false;
+        String params = rawParams;
+        while (!params.isEmpty()) {
+            char first = params.charAt(0);
+            if (first == '?' || first == '>' || first == '!' || first == '=') {
+                params = params.substring(1);
+            } else {
+                break;
+            }
+        }
+        List<Integer> values = parseParams(params);
+        switch (command) {
+            case 'm':
+                applySgr(values);
+                break;
+            case 'H':
+            case 'f':
+                cursorRow = clamp(param(values, 0, 1) - 1, 0, rows - 1);
+                cursorCol = clamp(param(values, 1, 1) - 1, 0, cols - 1);
+                break;
+            case 'A':
+                cursorRow = clamp(cursorRow - param(values, 0, 1), 0, rows - 1);
+                break;
+            case 'B':
+                cursorRow = clamp(cursorRow + param(values, 0, 1), 0, rows - 1);
+                break;
+            case 'C':
+                cursorCol = clamp(cursorCol + param(values, 0, 1), 0, cols - 1);
+                break;
+            case 'D':
+                cursorCol = clamp(cursorCol - param(values, 0, 1), 0, cols - 1);
+                break;
+            case 'G':
+                cursorCol = clamp(param(values, 0, 1) - 1, 0, cols - 1);
+                break;
+            case 'd':
+                cursorRow = clamp(param(values, 0, 1) - 1, 0, rows - 1);
+                break;
+            case 'J':
+                eraseDisplay(param(values, 0, 0));
+                break;
+            case 'K':
+                eraseLine(param(values, 0, 0));
+                break;
+            case 'P':
+                deleteChars(param(values, 0, 1));
+                break;
+            case '@':
+                insertChars(param(values, 0, 1));
+                break;
+            case 'X':
+                eraseChars(param(values, 0, 1));
+                break;
+            case 'L':
+                insertLines(param(values, 0, 1));
+                break;
+            case 'M':
+                deleteLines(param(values, 0, 1));
+                break;
+            case 's':
+                saveCursor();
+                break;
+            case 'u':
+                restoreCursor();
+                break;
+            case 'c':
+                break;
+            default:
+                break;
+        }
+    }
+
+    private void applySgr(List<Integer> values) {
+        if (values.isEmpty()) {
+            values.add(0);
+        }
+        for (int index = 0; index < values.size(); index++) {
+            int value = values.get(index);
+            if (value == 0) {
+                fg = DEFAULT_FG;
+                bg = DEFAULT_BG;
+                bold = false;
+            } else if (value == 1) {
+                bold = true;
+            } else if (value == 22) {
+                bold = false;
+            } else if (value == 39) {
+                fg = DEFAULT_FG;
+            } else if (value == 49) {
+                bg = DEFAULT_BG;
+            } else if ((value >= 30 && value <= 37) || (value >= 90 && value <= 97)) {
+                fg = ansiColor(value, false);
+            } else if ((value >= 40 && value <= 47) || (value >= 100 && value <= 107)) {
+                bg = ansiColor(value, true);
+            } else if ((value == 38 || value == 48) && index + 2 < values.size()) {
+                boolean background = value == 48;
+                int mode = values.get(index + 1);
+                if (mode == 5) {
+                    int color = xtermColor(values.get(index + 2));
+                    if (background) {
+                        bg = color;
+                    } else {
+                        fg = color;
+                    }
+                    index += 2;
+                } else if (mode == 2 && index + 4 < values.size()) {
+                    int color = Color.rgb(
+                            clamp(values.get(index + 2), 0, 255),
+                            clamp(values.get(index + 3), 0, 255),
+                            clamp(values.get(index + 4), 0, 255)
+                    );
+                    if (background) {
+                        bg = color;
+                    } else {
+                        fg = color;
+                    }
+                    index += 4;
+                }
+            }
+        }
+    }
+
+    private void putChar(char value) {
+        if (wrapPending) {
+            wrapPending = false;
+            newLine();
+        }
+        cells[cursorRow][cursorCol].set(value, fg, bg, bold);
+        if (cursorCol == cols - 1) {
+            wrapPending = true;
+        } else {
+            cursorCol++;
+        }
+    }
+
+    private void newLine() {
+        wrapPending = false;
+        cursorRow++;
+        if (cursorRow >= rows) {
+            scrollUp(1);
+            cursorRow = rows - 1;
+        }
+        cursorCol = 0;
+    }
+
+    private void reverseIndex() {
+        if (cursorRow == 0) {
+            scrollDown(1);
+        } else {
+            cursorRow--;
+        }
+    }
+
+    private void eraseDisplay(int mode) {
+        if (mode == 2 || mode == 3) {
+            clearScreen();
+        } else if (mode == 1) {
+            for (int row = 0; row < cursorRow; row++) {
+                clearLine(row, 0, cols - 1);
+            }
+            clearLine(cursorRow, 0, cursorCol);
+        } else {
+            clearLine(cursorRow, cursorCol, cols - 1);
+            for (int row = cursorRow + 1; row < rows; row++) {
+                clearLine(row, 0, cols - 1);
+            }
+        }
+    }
+
+    private void eraseLine(int mode) {
+        if (mode == 2) {
+            clearLine(cursorRow, 0, cols - 1);
+        } else if (mode == 1) {
+            clearLine(cursorRow, 0, cursorCol);
+        } else {
+            clearLine(cursorRow, cursorCol, cols - 1);
+        }
+    }
+
+    private void eraseChars(int count) {
+        int end = Math.min(cols - 1, cursorCol + Math.max(1, count) - 1);
+        clearLine(cursorRow, cursorCol, end);
+    }
+
+    private void deleteChars(int count) {
+        count = Math.max(1, count);
+        Cell[] line = cells[cursorRow];
+        for (int col = cursorCol; col < cols; col++) {
+            int source = col + count;
+            if (source < cols) {
+                line[col].copyFrom(line[source]);
+            } else {
+                line[col].clear();
+            }
+        }
+    }
+
+    private void insertChars(int count) {
+        count = Math.max(1, count);
+        Cell[] line = cells[cursorRow];
+        for (int col = cols - 1; col >= cursorCol; col--) {
+            int source = col - count;
+            if (source >= cursorCol) {
+                line[col].copyFrom(line[source]);
+            } else {
+                line[col].clear();
+            }
+        }
+    }
+
+    private void insertLines(int count) {
+        count = Math.min(Math.max(1, count), rows - cursorRow);
+        for (int row = rows - 1; row >= cursorRow + count; row--) {
+            copyLine(row, row - count);
+        }
+        for (int row = cursorRow; row < cursorRow + count; row++) {
+            clearLine(row, 0, cols - 1);
+        }
+    }
+
+    private void deleteLines(int count) {
+        count = Math.min(Math.max(1, count), rows - cursorRow);
+        for (int row = cursorRow; row + count < rows; row++) {
+            copyLine(row, row + count);
+        }
+        for (int row = rows - count; row < rows; row++) {
+            clearLine(row, 0, cols - 1);
+        }
+    }
+
+    private void clearScreen() {
+        for (int row = 0; row < rows; row++) {
+            clearLine(row, 0, cols - 1);
+        }
+    }
+
+    private void clearLine(int row, int start, int end) {
+        start = clamp(start, 0, cols - 1);
+        end = clamp(end, 0, cols - 1);
+        for (int col = start; col <= end; col++) {
+            cells[row][col].clear();
+        }
+    }
+
+    private void scrollUp(int count) {
+        count = Math.min(Math.max(1, count), rows);
+        for (int row = 0; row + count < rows; row++) {
+            copyLine(row, row + count);
+        }
+        for (int row = rows - count; row < rows; row++) {
+            clearLine(row, 0, cols - 1);
+        }
+    }
+
+    private void scrollDown(int count) {
+        count = Math.min(Math.max(1, count), rows);
+        for (int row = rows - 1; row - count >= 0; row--) {
+            copyLine(row, row - count);
+        }
+        for (int row = 0; row < count; row++) {
+            clearLine(row, 0, cols - 1);
+        }
+    }
+
+    private void copyLine(int target, int source) {
+        for (int col = 0; col < cols; col++) {
+            cells[target][col].copyFrom(cells[source][col]);
+        }
+    }
+
+    private void appendRow(SpannableStringBuilder output, int row) {
+        int col = 0;
+        while (col < cols) {
+            Cell first = cells[row][col];
+            int start = output.length();
+            int fgColor = first.fg;
+            int bgColor = first.bg;
+            boolean isBold = first.bold;
+            while (col < cols) {
+                Cell cell = cells[row][col];
+                if (cell.fg != fgColor || cell.bg != bgColor || cell.bold != isBold) {
+                    break;
+                }
+                output.append(cell.value);
+                col++;
+            }
+            int end = output.length();
+            output.setSpan(new ForegroundColorSpan(fgColor), start, end, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
+            if (bgColor != DEFAULT_BG) {
+                output.setSpan(new BackgroundColorSpan(bgColor), start, end, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
+            }
+            if (isBold) {
+                output.setSpan(new StyleSpan(Typeface.BOLD), start, end, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
+            }
+        }
+    }
+
+    private void saveCursor() {
+        savedRow = cursorRow;
+        savedCol = cursorCol;
+    }
+
+    private void restoreCursor() {
+        cursorRow = clamp(savedRow, 0, rows - 1);
+        cursorCol = clamp(savedCol, 0, cols - 1);
+    }
+
+    private int skipStringEscape(String text, int start) {
+        int cursor = start;
+        while (cursor < text.length()) {
+            char item = text.charAt(cursor);
+            if (item == '\u0007') {
+                return cursor + 1;
+            }
+            if (item == '\u001b' && cursor + 1 < text.length() && text.charAt(cursor + 1) == '\\') {
+                return cursor + 2;
+            }
+            cursor++;
+        }
+        return -1;
+    }
+
+    private boolean isNakedDeviceAttributesTail(String text, int index) {
+        int cursor = index;
+        boolean hasSemicolon = false;
+        if (cursor < text.length() && (text.charAt(cursor) == '?' || text.charAt(cursor) == '>')) {
+            cursor++;
+        }
+        while (cursor < text.length()) {
+            char item = text.charAt(cursor);
+            if (item >= '0' && item <= '9') {
+                cursor++;
+                continue;
+            }
+            if (item == ';') {
+                hasSemicolon = true;
+                cursor++;
+                continue;
+            }
+            return item == 'c' && hasSemicolon && cursor > index && cursor - index <= 16;
+        }
+        return false;
+    }
+
+    private int skipNakedDeviceAttributesTail(String text, int index) {
+        int cursor = index;
+        while (cursor < text.length() && text.charAt(cursor) != 'c') {
+            cursor++;
+        }
+        return Math.min(cursor + 1, text.length());
+    }
+
+    private int findAnsiEnd(String text, int start) {
+        for (int index = start; index < text.length(); index++) {
+            char item = text.charAt(index);
+            if (item >= '@' && item <= '~') {
+                return index;
+            }
+        }
+        return -1;
+    }
+
+    private List<Integer> parseParams(String params) {
+        List<Integer> values = new ArrayList<>();
+        if (params.isEmpty()) {
+            return values;
+        }
+        String[] parts = params.split(";", -1);
+        for (String part : parts) {
+            String cleaned = part.trim();
+            if (cleaned.isEmpty()) {
+                values.add(0);
+                continue;
+            }
+            try {
+                values.add(Integer.parseInt(cleaned));
+            } catch (NumberFormatException ignored) {
+                values.add(0);
+            }
+        }
+        return values;
+    }
+
+    private int param(List<Integer> values, int index, int fallback) {
+        if (index >= values.size()) {
+            return fallback;
+        }
+        int value = values.get(index);
+        return value == 0 ? fallback : value;
+    }
+
+    private int ansiColor(int code, boolean background) {
+        int base = background ? (code >= 100 ? code - 100 : code - 40) : (code >= 90 ? code - 90 : code - 30);
+        boolean bright = code >= 90;
+        switch (base) {
+            case 0:
+                return bright ? Color.rgb(80, 88, 100) : Color.rgb(33, 38, 45);
+            case 1:
+                return bright ? Color.rgb(255, 123, 114) : Color.rgb(248, 81, 73);
+            case 2:
+                return bright ? Color.rgb(86, 211, 100) : Color.rgb(63, 185, 80);
+            case 3:
+                return bright ? Color.rgb(234, 179, 8) : Color.rgb(210, 153, 34);
+            case 4:
+                return bright ? Color.rgb(121, 192, 255) : Color.rgb(88, 166, 255);
+            case 5:
+                return bright ? Color.rgb(210, 168, 255) : Color.rgb(188, 140, 255);
+            case 6:
+                return bright ? Color.rgb(86, 211, 219) : Color.rgb(57, 197, 187);
+            case 7:
+            default:
+                return bright ? Color.rgb(240, 246, 252) : Color.rgb(201, 209, 217);
+        }
+    }
+
+    private int xtermColor(int value) {
+        value = clamp(value, 0, 255);
+        if (value < 16) {
+            if (value < 8) {
+                return ansiColor(30 + value, false);
+            }
+            return ansiColor(90 + value - 8, false);
+        }
+        if (value >= 232) {
+            int shade = 8 + (value - 232) * 10;
+            return Color.rgb(shade, shade, shade);
+        }
+        int index = value - 16;
+        int red = xtermComponent(index / 36);
+        int green = xtermComponent((index / 6) % 6);
+        int blue = xtermComponent(index % 6);
+        return Color.rgb(red, green, blue);
+    }
+
+    private int xtermComponent(int value) {
+        return value == 0 ? 0 : 55 + value * 40;
+    }
+
+    private static int clamp(int value, int min, int max) {
+        return Math.max(min, Math.min(max, value));
+    }
+
+    private static final class Cell {
+        char value = ' ';
+        int fg = DEFAULT_FG;
+        int bg = DEFAULT_BG;
+        boolean bold;
+
+        void clear() {
+            value = ' ';
+            fg = DEFAULT_FG;
+            bg = DEFAULT_BG;
+            bold = false;
+        }
+
+        void set(char nextValue, int nextFg, int nextBg, boolean nextBold) {
+            value = nextValue;
+            fg = nextFg;
+            bg = nextBg;
+            bold = nextBold;
+        }
+
+        void copyFrom(Cell other) {
+            value = other.value;
+            fg = other.fg;
+            bg = other.bg;
+            bold = other.bold;
+        }
+    }
+}

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

@@ -12,6 +12,9 @@ import java.nio.charset.StandardCharsets;
 import java.security.MessageDigest;
 import java.security.SecureRandom;
 import java.util.Arrays;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+import java.util.concurrent.RejectedExecutionException;
 
 import javax.net.ssl.SSLSocketFactory;
 
@@ -25,6 +28,8 @@ final class TerminalSocketClient {
 
     private final Object writeLock = new Object();
     private final Listener listener;
+    private final ExecutorService writeExecutor = Executors.newSingleThreadExecutor(runnable ->
+            new Thread(runnable, "terminal-ws-write"));
     private Socket socket;
     private BufferedInputStream input;
     private BufferedOutputStream output;
@@ -42,32 +47,34 @@ final class TerminalSocketClient {
     }
 
     void sendInput(String data) {
-        sendMessage("input", "data", data);
+        sendMessageAsync("input", "data", data);
     }
 
     void resize(int cols, int rows) {
-        sendMessage("resize", "cols", cols, "rows", rows);
+        sendMessageAsync("resize", "cols", cols, "rows", rows);
     }
 
     void scroll(int lines) {
-        sendMessage("scroll", "lines", lines);
+        sendMessageAsync("scroll", "lines", lines);
     }
 
     void clearHistory() {
-        sendMessage("clear-history");
+        sendMessageAsync("clear-history");
     }
 
     void close() {
         closed = true;
+        try {
+            writeExecutor.execute(() -> {
                 try {
                     sendFrame(8, new byte[0]);
                 } catch (Exception ignored) {
                 }
-        try {
-            if (socket != null) {
-                socket.close();
-            }
-        } catch (Exception ignored) {
+                closeSocketQuietly();
+            });
+            writeExecutor.shutdown();
+        } catch (RejectedExecutionException ignored) {
+            closeSocketQuietly();
         }
     }
 
@@ -82,7 +89,7 @@ final class TerminalSocketClient {
             input = new BufferedInputStream(socket.getInputStream());
             output = new BufferedOutputStream(socket.getOutputStream());
             handshake(uri);
-            sendMessage(
+            sendMessageSync(
                     "attach",
                     "tabId", "android-" + System.currentTimeMillis(),
                     "sessionName", sessionName,
@@ -98,12 +105,8 @@ final class TerminalSocketClient {
         } finally {
             closed = true;
             listener.onClosed();
-            try {
-                if (socket != null) {
-                    socket.close();
-                }
-            } catch (Exception ignored) {
-            }
+            closeSocketQuietly();
+            writeExecutor.shutdownNow();
         }
     }
 
@@ -243,7 +246,7 @@ final class TerminalSocketClient {
         }
     }
 
-    private void sendJson(JSONObject object) {
+    private void sendJsonSync(JSONObject object) {
         try {
             sendFrame(1, object.toString().getBytes(StandardCharsets.UTF_8));
         } catch (Exception error) {
@@ -253,14 +256,21 @@ final class TerminalSocketClient {
         }
     }
 
-    private void sendMessage(String type, Object... keyValues) {
+    private void sendMessageAsync(String type, Object... keyValues) {
+        try {
+            writeExecutor.execute(() -> sendMessageSync(type, keyValues));
+        } catch (RejectedExecutionException ignored) {
+        }
+    }
+
+    private void sendMessageSync(String type, Object... keyValues) {
         try {
             JSONObject object = new JSONObject();
             object.put("type", type);
             for (int i = 0; i + 1 < keyValues.length; i += 2) {
                 object.put(String.valueOf(keyValues[i]), keyValues[i + 1]);
             }
-            sendJson(object);
+            sendJsonSync(object);
         } catch (Exception error) {
             if (!closed) {
                 listener.onError(error.getMessage() == null ? error.toString() : error.getMessage());
@@ -268,6 +278,15 @@ final class TerminalSocketClient {
         }
     }
 
+    private void closeSocketQuietly() {
+        try {
+            if (socket != null) {
+                socket.close();
+            }
+        } catch (Exception ignored) {
+        }
+    }
+
     private void sendFrame(int opcode, byte[] payload) throws Exception {
         synchronized (writeLock) {
             if (output == null) {

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

@@ -26,6 +26,8 @@ import java.util.concurrent.Executors;
 
 final class UpdateManager {
     private static final String PREF_PENDING_INSTALL_APK = "pending_install_apk";
+    private static final int NETWORK_ATTEMPTS = 3;
+    private static final long RETRY_DELAY_MS = 1200L;
 
     interface Callback {
         void onChecking(boolean checking);
@@ -51,25 +53,77 @@ final class UpdateManager {
     }
 
     void check(boolean userInitiated) {
+        checkWithFallback(userInitiated);
+    }
+
+    void checkSelected(boolean userInitiated) {
+        startUpdateCheck(
+                userInitiated,
+                "selected source",
+                new String[]{getUpdateManifestUrl()}
+        );
+    }
+
+    void checkGitea(boolean userInitiated) {
+        startUpdateCheck(
+                userInitiated,
+                "Gitea",
+                new String[]{BuildConfig.DEFAULT_GITEA_UPDATE_URL}
+        );
+    }
+
+    void checkGithub(boolean userInitiated) {
+        startUpdateCheck(
+                userInitiated,
+                "GitHub",
+                new String[]{BuildConfig.DEFAULT_GITHUB_UPDATE_URL}
+        );
+    }
+
+    void checkWithFallback(boolean userInitiated) {
+        startUpdateCheck(
+                userInitiated,
+                "Gitea, then GitHub",
+                new String[]{BuildConfig.DEFAULT_GITEA_UPDATE_URL, BuildConfig.DEFAULT_GITHUB_UPDATE_URL}
+        );
+    }
+
+    private void startUpdateCheck(boolean userInitiated, String label, String[] manifestUrls) {
         if (checkInProgress) {
             postMessage("Update check already running");
             return;
         }
-        String manifestUrl = getUpdateManifestUrl();
         checkInProgress = true;
         callback.onChecking(true);
-        postMessage("Checking update from " + hostLabel(manifestUrl) + "...");
+        postMessage("Checking update: " + label + "...");
         executor.execute(() -> {
+            Exception lastError = null;
             try {
+                for (int index = 0; index < manifestUrls.length; index++) {
+                    String manifestUrl = manifestUrls[index];
+                    try {
+                        postMessage("Checking " + hostLabel(manifestUrl) + "...");
                         ReleaseInfo info = fetchReleaseInfo(manifestUrl);
                         if (info.versionCode <= BuildConfig.VERSION_CODE) {
-                    postMessage("Already up to date: " + BuildConfig.VERSION_NAME);
+                            postMessage("Already up to date: " + BuildConfig.VERSION_NAME + " from " + hostLabel(manifestUrl));
                             return;
                         }
-                postMessage("Update found: " + info.versionName);
+                        postMessage("Update found: " + info.versionName + " from " + hostLabel(manifestUrl));
                         activity.runOnUiThread(() -> showUpdateDialog(info));
+                        return;
                     } catch (Exception error) {
-                postMessage(userInitiated ? "Update check failed: " + error.getMessage() : null);
+                        lastError = error;
+                        if (index + 1 < manifestUrls.length) {
+                            postMessage(hostLabel(manifestUrl) + " failed; trying " + hostLabel(manifestUrls[index + 1]) + "...");
+                        }
+                    }
+                }
+                if (lastError != null) {
+                    throw lastError;
+                }
+                throw new IllegalStateException("No update sources configured");
+            } catch (Exception finalError) {
+                postMessage(userInitiated ? "Update check failed: " + finalError.getMessage() : null);
             } finally {
                 checkInProgress = false;
                 activity.runOnUiThread(() -> callback.onChecking(false));
@@ -177,6 +231,22 @@ final class UpdateManager {
     }
 
     private String readText(String url) throws Exception {
+        Exception lastError = null;
+        for (int attempt = 1; attempt <= NETWORK_ATTEMPTS; attempt++) {
+            try {
+                return readTextOnce(url);
+            } catch (Exception error) {
+                lastError = error;
+                if (attempt < NETWORK_ATTEMPTS) {
+                    postMessage("Retrying " + hostLabel(url) + " (" + (attempt + 1) + "/" + NETWORK_ATTEMPTS + ")...");
+                    waitBeforeRetry();
+                }
+            }
+        }
+        throw lastError == null ? new IllegalStateException("Request failed") : lastError;
+    }
+
+    private String readTextOnce(String url) throws Exception {
         HttpURLConnection connection = (HttpURLConnection) new URL(url).openConnection();
         connection.setConnectTimeout(12000);
         connection.setReadTimeout(12000);
@@ -238,7 +308,36 @@ final class UpdateManager {
         }
 
         postMessage("Downloading " + info.versionName + "...");
-        HttpURLConnection connection = (HttpURLConnection) new URL(info.apkUrl).openConnection();
+        File partial = new File(dir, "tmux-android-" + info.versionCode + ".apk.tmp");
+        if (partial.exists()) {
+            partial.delete();
+        }
+        if (apk.exists()) {
+            apk.delete();
+        }
+
+        Exception lastError = null;
+        for (int attempt = 1; attempt <= NETWORK_ATTEMPTS; attempt++) {
+            try {
+                downloadApkOnce(info.apkUrl, partial);
+                if (!partial.renameTo(apk)) {
+                    throw new IllegalStateException("Cannot finalize APK download");
+                }
+                return apk;
+            } catch (Exception error) {
+                lastError = error;
+                partial.delete();
+                if (attempt < NETWORK_ATTEMPTS) {
+                    postMessage("Retrying APK download (" + (attempt + 1) + "/" + NETWORK_ATTEMPTS + ")...");
+                    waitBeforeRetry();
+                }
+            }
+        }
+        throw lastError == null ? new IllegalStateException("APK download failed") : lastError;
+    }
+
+    private void downloadApkOnce(String apkUrl, File apk) throws Exception {
+        HttpURLConnection connection = (HttpURLConnection) new URL(apkUrl).openConnection();
         connection.setConnectTimeout(12000);
         connection.setReadTimeout(60000);
         try (InputStream input = new BufferedInputStream(connection.getInputStream());
@@ -251,7 +350,6 @@ final class UpdateManager {
         } finally {
             connection.disconnect();
         }
-        return apk;
     }
 
     private boolean isCachedApkValid(File apk, ReleaseInfo info) throws Exception {
@@ -366,4 +464,8 @@ final class UpdateManager {
         }
         activity.runOnUiThread(() -> callback.onMessage(message));
     }
+
+    private void waitBeforeRetry() throws InterruptedException {
+        Thread.sleep(RETRY_DELAY_MS);
+    }
 }

app/src/main/res/values/styles.xml

@@ -1,11 +1,12 @@
 <?xml version="1.0" encoding="utf-8"?>
 <resources>
-    <style name="AppTheme" parent="android:style/Theme.Material.Light.NoActionBar">
+    <style name="AppTheme" parent="android:style/Theme.Material.NoActionBar">
         <item name="android:fontFamily">sans</item>
         <item name="android:windowLightStatusBar">false</item>
-        <item name="android:statusBarColor">#111418</item>
-        <item name="android:navigationBarColor">#111418</item>
+        <item name="android:windowLightNavigationBar">false</item>
+        <item name="android:statusBarColor">#090B0D</item>
+        <item name="android:navigationBarColor">#090B0D</item>
+        <item name="android:windowBackground">#090B0D</item>
         <item name="android:windowActionModeOverlay">true</item>
     </style>
 </resources>
-

docs/android-client-notes.md

@@ -87,10 +87,12 @@ Implemented now:
   preview display
 - GitHub Actions APK build
 - release manifest `latest.json`
-- selected-source update checks; Gitea and GitHub are not probed in the same
-  update check
+- Auto/Gitea/GitHub/Selected update checks, with Auto falling back from Gitea
+  to GitHub
 - one-download-per-version APK cache, SHA-256 verification, and installer
   handoff
+- terminal viewport resize derived from the Android text area, including
+  keyboard height changes, to avoid fixed-width tmux output wrapping on phones
 - permission/about surfaces for unknown-app install status, notification status,
   app settings, app version/build type, package name, selected update source, and
   HTTP/WebSocket API/protocol summary
@@ -101,11 +103,11 @@ The Android app cannot silently replace itself. It may download a newer APK and
 open Android's package installer, but the user must approve the install. On
 Android 8+, the user may also need to allow this app to install unknown apps.
 
-The app checks exactly one update source per run: the selected manifest/API URL.
-Gitea is the default public source because phones may not reach GitHub reliably.
-GitHub is available as an optional public source, but the app does not fall back
-across both providers during a normal check. This keeps update behavior
-predictable on mobile networks and avoids duplicate provider checks.
+The app provides explicit update checks for Auto, Gitea, GitHub, and Selected.
+Auto checks Gitea first because phones may not reach GitHub reliably, then tries
+GitHub only if Gitea cannot be reached. The manual Gitea, GitHub, and Selected
+buttons force one source. Transient network failures are retried against the
+current source before a source is considered failed.
 
 Downloaded APKs are cached by `versionCode`. If a cached APK exists and its
 SHA-256 matches the manifest, the app reuses it instead of downloading the same
@@ -119,6 +121,14 @@ runs are for CI artifacts and should be used to validate grouped changes. Do not
 publish a new tag for every small UI copy or layout change; publish when there
 is a useful feature or test batch for phone-side validation.
 
+Release APKs must be identical across the public GitHub and Gitea download
+channels. Treat the GitHub Release APK as the canonical build artifact, then
+mirror that same APK byte-for-byte to the matching Gitea Release. The Gitea
+`latest.json` should point to the Gitea APK URL, but it must keep the same
+`versionCode`, `versionName`, and `sha256` as the GitHub manifest. A Gitea-built
+APK is only a compile check unless its SHA-256 exactly matches the GitHub
+release APK.
+
 ## Native Roadmap
 
 To converge with the upstream mobile design, the next implementation should add

scripts/mirror-gitea-release.sh

@@ -0,0 +1,115 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+usage() {
+  cat >&2 <<'EOF'
+Usage: scripts/mirror-gitea-release.sh TAG APK_PATH [VERSION_CODE] [VERSION_NAME]
+
+Mirrors an already-built APK to the Gitea release for TAG and uploads a
+Gitea-specific latest.json.
+
+Token source:
+  TMUX_GITEA_TOKEN environment variable, or hidden stdin prompt.
+EOF
+}
+
+if [ "${1:-}" = "-h" ] || [ "${1:-}" = "--help" ]; then
+  usage
+  exit 0
+fi
+
+if [ "$#" -lt 2 ] || [ "$#" -gt 4 ]; then
+  usage
+  exit 2
+fi
+
+TAG="$1"
+APK_PATH="$2"
+VERSION_NAME="${4:-${TAG#v}}"
+
+if [ ! -f "$APK_PATH" ]; then
+  echo "APK not found: $APK_PATH" >&2
+  exit 1
+fi
+
+if [ -n "${3:-}" ]; then
+  VERSION_CODE="$3"
+else
+  IFS=. read -r MAJOR MINOR PATCH <<EOF
+$VERSION_NAME
+EOF
+  VERSION_CODE=$((MAJOR * 1000000 + MINOR * 1000 + PATCH))
+fi
+
+TOKEN="${TMUX_GITEA_TOKEN:-}"
+if [ -z "$TOKEN" ]; then
+  printf "Gitea token: " >&2
+  IFS= read -rs TOKEN
+  printf "\n" >&2
+fi
+
+if [ -z "$TOKEN" ]; then
+  echo "Missing Gitea token." >&2
+  exit 1
+fi
+
+API_ROOT="https://gitea.neatcn.com/api/v1/repos/tmux/tmux-browser-android"
+RELEASE_PAGE_URL="https://gitea.neatcn.com/tmux/tmux-browser-android/releases/tag/${TAG}"
+APK_URL="https://gitea.neatcn.com/tmux/tmux-browser-android/releases/download/${TAG}/tmux-android.apk"
+SHA256="$(sha256sum "$APK_PATH" | cut -d " " -f 1)"
+WORK_DIR="$(mktemp -d)"
+trap 'rm -rf "$WORK_DIR"' EXIT
+
+LATEST_JSON="${WORK_DIR}/latest.json"
+cat > "$LATEST_JSON" <<JSON
+{
+  "versionCode": ${VERSION_CODE},
+  "versionName": "${VERSION_NAME}",
+  "apkUrl": "${APK_URL}",
+  "sha256": "${SHA256}",
+  "releasePageUrl": "${RELEASE_PAGE_URL}",
+  "minSdk": 26
+}
+JSON
+
+RELEASE_JSON="${WORK_DIR}/release.json"
+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 ${TOKEN}" \
+  -H "Content-Type: application/json" \
+  -d "$BODY" \
+  "${API_ROOT}/releases" \
+  -o "$RELEASE_JSON"; then
+  curl -fsSL \
+    -H "Authorization: token ${TOKEN}" \
+    "${API_ROOT}/releases/tags/${TAG}" \
+    -o "$RELEASE_JSON"
+fi
+
+RELEASE_ID="$(sed -n 's/^{"id":\([0-9][0-9]*\),.*/\1/p' "$RELEASE_JSON" | head -1)"
+if [ -z "$RELEASE_ID" ]; then
+  echo "Cannot resolve Gitea release id for ${TAG}." >&2
+  exit 1
+fi
+
+upload_asset() {
+  local file="$1"
+  local name="$2"
+  local type="$3"
+  curl -fsSL \
+    -X POST \
+    -H "Authorization: token ${TOKEN}" \
+    -F "attachment=@${file};type=${type}" \
+    "${API_ROOT}/releases/${RELEASE_ID}/assets?name=${name}" \
+    -o "${WORK_DIR}/${name}.asset.json"
+}
+
+upload_asset "$APK_PATH" "tmux-android.apk" "application/vnd.android.package-archive"
+upload_asset "$LATEST_JSON" "latest.json" "application/json"
+
+echo "Mirrored ${TAG} to Gitea release ${RELEASE_ID}"
+echo "versionCode=${VERSION_CODE}"
+echo "versionName=${VERSION_NAME}"
+echo "sha256=${SHA256}"