android: add attachment composer flow

android/app/src/main/java/com/hyzq/boss/AttachmentComposerState.java

@@ -0,0 +1,39 @@
+package com.hyzq.boss;
+
+import androidx.annotation.Nullable;
+
+public final class AttachmentComposerState {
+    private AttachmentComposerState() {}
+
+    public static boolean requiresConfirmation(@Nullable String sourceType) {
+        return "image".equals(sourceType) || "video".equals(sourceType);
+    }
+
+    public static final class PendingAttachment {
+        public final String sourceType;
+        public final String fileName;
+        public final String mimeType;
+        public final long fileSizeBytes;
+        public final byte[] bytes;
+
+        public PendingAttachment(
+                String sourceType,
+                String fileName,
+                String mimeType,
+                long fileSizeBytes,
+                byte[] bytes
+        ) {
+            this.sourceType = sourceType == null ? "file" : sourceType;
+            this.fileName = fileName == null || fileName.trim().isEmpty() ? "attachment" : fileName;
+            this.mimeType = mimeType == null || mimeType.trim().isEmpty()
+                    ? "application/octet-stream"
+                    : mimeType;
+            this.fileSizeBytes = Math.max(fileSizeBytes, bytes == null ? 0 : bytes.length);
+            this.bytes = bytes == null ? new byte[0] : bytes.clone();
+        }
+
+        public boolean requiresConfirmation() {
+            return AttachmentComposerState.requiresConfirmation(sourceType);
+        }
+    }
+}

android/app/src/main/java/com/hyzq/boss/BossApiClient.java

@@ -19,6 +19,7 @@ import java.io.OutputStreamWriter;
 import java.net.HttpURLConnection;
 import java.net.URL;
 import java.nio.charset.StandardCharsets;
+import java.util.Locale;
 import java.util.List;
 import java.util.Map;
 
@@ -100,6 +101,44 @@ public class BossApiClient {
         return requestWithRestore("POST", "/api/v1/projects/" + encode(projectId) + "/messages", payload);
     }
 
+    public ApiResponse uploadAttachment(
+            String projectId,
+            String fileName,
+            String mimeType,
+            byte[] bytes,
+            String sourceType
+    ) throws IOException, JSONException {
+        HttpURLConnection connection = openConnection("/api/v1/projects/" + encode(projectId) + "/attachments");
+        prepareConnection(connection, "POST");
+        connection.setDoOutput(true);
+
+        String boundary = "BossBoundary" + System.currentTimeMillis();
+        connection.setRequestProperty("Content-Type", "multipart/form-data; boundary=" + boundary);
+
+        try (OutputStream outputStream = connection.getOutputStream()) {
+            writeMultipartPart(outputStream, boundary, "sourceType", sourceType, null);
+            writeMultipartPart(
+                    outputStream,
+                    boundary,
+                    "file",
+                    bytes == null ? new byte[0] : bytes,
+                    fileName,
+                    mimeType
+            );
+            outputStream.write(("--" + boundary + "--\r\n").getBytes(StandardCharsets.UTF_8));
+        }
+
+        return executeConnection(connection, true);
+    }
+
+    public ApiResponse analyzeAttachment(String projectId, String attachmentId) throws IOException, JSONException {
+        return requestWithRestoreRaw(
+                "POST",
+                "/api/v1/projects/" + encode(projectId) + "/attachments/" + encode(attachmentId) + "/analyze",
+                "{}"
+        );
+    }
+
     public ApiResponse forwardProjectMessage(String projectId, String targetProjectId, JSONObject payload) throws IOException, JSONException {
         String requestBody = ForwardPayloads.toRequestBody(targetProjectId, payload);
         return requestWithRestoreRaw("POST", "/api/v1/projects/" + encode(projectId) + "/forwards", requestBody);
@@ -269,6 +308,25 @@ public class BossApiClient {
 
     private ApiResponse requestRaw(String method, String path, @Nullable String body, boolean expectProtected) throws IOException, JSONException {
         HttpURLConnection connection = openConnection(path);
+        prepareConnection(connection, method);
+
+        if (body != null) {
+            connection.setDoOutput(true);
+            connection.setRequestProperty("Content-Type", "application/json");
+            try (OutputStream outputStream = connection.getOutputStream();
+                 BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(outputStream, StandardCharsets.UTF_8))) {
+                writer.write(body);
+            }
+        }
+
+        return executeConnection(connection, expectProtected);
+    }
+
+    HttpURLConnection openConnection(String path) throws IOException {
+        return (HttpURLConnection) new URL(baseUrl + path).openConnection();
+    }
+
+    private void prepareConnection(HttpURLConnection connection, String method) throws IOException {
         connection.setRequestMethod(method);
         connection.setConnectTimeout(12000);
         connection.setReadTimeout(12000);
@@ -281,16 +339,9 @@ public class BossApiClient {
         if (!cookie.isEmpty()) {
             connection.setRequestProperty("Cookie", cookie);
         }
+    }
 
-        if (body != null) {
-            connection.setDoOutput(true);
-            connection.setRequestProperty("Content-Type", "application/json");
-            try (OutputStream outputStream = connection.getOutputStream();
-                 BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(outputStream, StandardCharsets.UTF_8))) {
-                writer.write(body);
-            }
-        }
-
+    private ApiResponse executeConnection(HttpURLConnection connection, boolean expectProtected) throws IOException, JSONException {
         int statusCode = connection.getResponseCode();
         captureSessionCookie(connection.getHeaderFields());
         JSONObject json = readJson(statusCode >= 400 ? connection.getErrorStream() : connection.getInputStream());
@@ -305,8 +356,57 @@ public class BossApiClient {
         return new ApiResponse(statusCode, json == null ? new JSONObject() : json);
     }
 
-    HttpURLConnection openConnection(String path) throws IOException {
-        return (HttpURLConnection) new URL(baseUrl + path).openConnection();
+    private void writeMultipartPart(
+            OutputStream outputStream,
+            String boundary,
+            String fieldName,
+            String value,
+            @Nullable String contentType
+    ) throws IOException {
+        outputStream.write(("--" + boundary + "\r\n").getBytes(StandardCharsets.UTF_8));
+        outputStream.write(
+                ("Content-Disposition: form-data; name=\"" + fieldName + "\"\r\n")
+                        .getBytes(StandardCharsets.UTF_8)
+        );
+        if (contentType != null && !contentType.isEmpty()) {
+            outputStream.write(("Content-Type: " + contentType + "\r\n").getBytes(StandardCharsets.UTF_8));
+        }
+        outputStream.write("\r\n".getBytes(StandardCharsets.UTF_8));
+        outputStream.write((value == null ? "" : value).getBytes(StandardCharsets.UTF_8));
+        outputStream.write("\r\n".getBytes(StandardCharsets.UTF_8));
+    }
+
+    private void writeMultipartPart(
+            OutputStream outputStream,
+            String boundary,
+            String fieldName,
+            byte[] bytes,
+            String fileName,
+            String contentType
+    ) throws IOException {
+        outputStream.write(("--" + boundary + "\r\n").getBytes(StandardCharsets.UTF_8));
+        outputStream.write(
+                String.format(
+                        Locale.US,
+                        "Content-Disposition: form-data; name=\"%s\"; filename=\"%s\"\r\n",
+                        fieldName,
+                        escapeMultipartValue(fileName)
+                ).getBytes(StandardCharsets.UTF_8)
+        );
+        outputStream.write(
+                ("Content-Type: " + (contentType == null || contentType.isEmpty()
+                        ? "application/octet-stream"
+                        : contentType) + "\r\n\r\n").getBytes(StandardCharsets.UTF_8)
+        );
+        outputStream.write(bytes == null ? new byte[0] : bytes);
+        outputStream.write("\r\n".getBytes(StandardCharsets.UTF_8));
+    }
+
+    private String escapeMultipartValue(String value) {
+        if (value == null) {
+            return "attachment";
+        }
+        return value.replace("\"", "%22");
     }
 
     private JSONObject readJson(InputStream stream) throws IOException, JSONException {

android/app/src/main/java/com/hyzq/boss/BossUi.java

@@ -673,26 +673,7 @@ public final class BossUi {
             boolean outgoing,
             @Nullable String kindLabel
     ) {
-        LinearLayout wrapper = new LinearLayout(context);
-        wrapper.setOrientation(LinearLayout.VERTICAL);
-        wrapper.setGravity(outgoing ? Gravity.END : Gravity.START);
-        LinearLayout.LayoutParams wrapperParams = new LinearLayout.LayoutParams(
-                LinearLayout.LayoutParams.MATCH_PARENT,
-                LinearLayout.LayoutParams.WRAP_CONTENT
-        );
-        wrapperParams.bottomMargin = dp(context, 12);
-        wrapper.setLayoutParams(wrapperParams);
-
-        TextView metaView = new TextView(context);
-        String metaText = senderLabel;
-        if (!TextUtils.isEmpty(meta)) {
-            metaText = metaText + " · " + meta;
-        }
-        metaView.setText(metaText);
-        metaView.setTextSize(11);
-        metaView.setTextColor(context.getColor(R.color.boss_text_soft));
-        metaView.setPadding(dp(context, 6), 0, dp(context, 6), dp(context, 4));
-        wrapper.addView(metaView);
+        LinearLayout wrapper = buildMessageWrapper(context, senderLabel, meta, outgoing);
 
         LinearLayout bubble = new LinearLayout(context);
         bubble.setOrientation(LinearLayout.VERTICAL);
@@ -723,6 +704,93 @@ public final class BossUi {
         return wrapper;
     }
 
+    public static LinearLayout buildAttachmentMessageCard(
+            Context context,
+            String senderLabel,
+            String sourceType,
+            String fileName,
+            @Nullable String detail,
+            @Nullable String status,
+            @Nullable String meta,
+            boolean outgoing
+    ) {
+        LinearLayout wrapper = buildMessageWrapper(context, senderLabel, meta, outgoing);
+
+        LinearLayout card = new LinearLayout(context);
+        card.setOrientation(LinearLayout.VERTICAL);
+        card.setMinimumWidth(dp(context, 180));
+        card.setPadding(dp(context, 14), dp(context, 12), dp(context, 14), dp(context, 12));
+        card.setBackground(createRoundedBackground(
+                outgoing ? Color.parseColor("#CFF0D8") : Color.WHITE,
+                dp(context, 18)
+        ));
+        card.setElevation(dp(context, 1));
+
+        if ("image".equals(sourceType) || "video".equals(sourceType)) {
+            TextView preview = new TextView(context);
+            LinearLayout.LayoutParams previewParams = new LinearLayout.LayoutParams(
+                    Math.round(context.getResources().getDisplayMetrics().widthPixels * 0.56f),
+                    dp(context, 118)
+            );
+            preview.setLayoutParams(previewParams);
+            preview.setGravity(Gravity.CENTER);
+            preview.setText("image".equals(sourceType) ? "图片预览" : "视频封面");
+            preview.setTextSize(13);
+            preview.setTypeface(Typeface.DEFAULT_BOLD);
+            preview.setTextColor(context.getColor(R.color.boss_text_muted));
+            preview.setBackground(createRoundedBackground(Color.parseColor("#EEF2EE"), dp(context, 14)));
+            card.addView(preview);
+
+            TextView nameView = buildAttachmentPrimaryText(context, fileName);
+            nameView.setPadding(0, dp(context, 10), 0, 0);
+            card.addView(nameView);
+
+            TextView statusView = buildAttachmentSecondaryText(
+                    context,
+                    TextUtils.isEmpty(status) ? "已发送" : status
+            );
+            statusView.setPadding(0, dp(context, 6), 0, 0);
+            card.addView(statusView);
+        } else {
+            LinearLayout row = new LinearLayout(context);
+            row.setOrientation(LinearLayout.HORIZONTAL);
+            row.setGravity(Gravity.CENTER_VERTICAL);
+
+            TextView icon = new TextView(context);
+            LinearLayout.LayoutParams iconParams = new LinearLayout.LayoutParams(dp(context, 42), dp(context, 42));
+            icon.setLayoutParams(iconParams);
+            icon.setGravity(Gravity.CENTER);
+            icon.setText("文");
+            icon.setTextSize(15);
+            icon.setTypeface(Typeface.DEFAULT_BOLD);
+            icon.setTextColor(context.getColor(R.color.boss_green));
+            icon.setBackground(createRoundedBackground(Color.parseColor("#E8F6ED"), dp(context, 12)));
+            row.addView(icon);
+
+            LinearLayout texts = new LinearLayout(context);
+            texts.setOrientation(LinearLayout.VERTICAL);
+            LinearLayout.LayoutParams textParams = new LinearLayout.LayoutParams(
+                    0,
+                    LinearLayout.LayoutParams.WRAP_CONTENT,
+                    1f
+            );
+            textParams.leftMargin = dp(context, 12);
+            texts.setLayoutParams(textParams);
+
+            texts.addView(buildAttachmentPrimaryText(context, fileName));
+            texts.addView(buildAttachmentSecondaryText(
+                    context,
+                    joinAttachmentDetail(detail, status)
+            ));
+            row.addView(texts);
+
+            card.addView(row);
+        }
+
+        wrapper.addView(card);
+        return wrapper;
+    }
+
     public static LinearLayout buildForwardSingleBubble(
             Context context,
             String senderLabel,
@@ -894,6 +962,65 @@ public final class BossUi {
         return button;
     }
 
+    private static LinearLayout buildMessageWrapper(
+            Context context,
+            String senderLabel,
+            @Nullable String meta,
+            boolean outgoing
+    ) {
+        LinearLayout wrapper = new LinearLayout(context);
+        wrapper.setOrientation(LinearLayout.VERTICAL);
+        wrapper.setGravity(outgoing ? Gravity.END : Gravity.START);
+        LinearLayout.LayoutParams wrapperParams = new LinearLayout.LayoutParams(
+                LinearLayout.LayoutParams.MATCH_PARENT,
+                LinearLayout.LayoutParams.WRAP_CONTENT
+        );
+        wrapperParams.bottomMargin = dp(context, 12);
+        wrapper.setLayoutParams(wrapperParams);
+
+        TextView metaView = new TextView(context);
+        String metaText = senderLabel;
+        if (!TextUtils.isEmpty(meta)) {
+            metaText = metaText + " · " + meta;
+        }
+        metaView.setText(metaText);
+        metaView.setTextSize(11);
+        metaView.setTextColor(context.getColor(R.color.boss_text_soft));
+        metaView.setPadding(dp(context, 6), 0, dp(context, 6), dp(context, 4));
+        wrapper.addView(metaView);
+        return wrapper;
+    }
+
+    private static TextView buildAttachmentPrimaryText(Context context, String text) {
+        TextView primary = new TextView(context);
+        primary.setText(TextUtils.isEmpty(text) ? "未命名附件" : text);
+        primary.setTextSize(15);
+        primary.setTypeface(Typeface.DEFAULT_BOLD);
+        primary.setTextColor(context.getColor(R.color.boss_text_primary));
+        primary.setMaxLines(2);
+        primary.setEllipsize(TextUtils.TruncateAt.END);
+        return primary;
+    }
+
+    private static TextView buildAttachmentSecondaryText(Context context, String text) {
+        TextView secondary = new TextView(context);
+        secondary.setText(TextUtils.isEmpty(text) ? "已发送" : text);
+        secondary.setTextSize(13);
+        secondary.setTextColor(context.getColor(R.color.boss_text_muted));
+        secondary.setPadding(0, dp(context, 6), 0, 0);
+        return secondary;
+    }
+
+    private static String joinAttachmentDetail(@Nullable String detail, @Nullable String status) {
+        if (TextUtils.isEmpty(detail)) {
+            return TextUtils.isEmpty(status) ? "已发送" : status;
+        }
+        if (TextUtils.isEmpty(status)) {
+            return detail;
+        }
+        return detail + " · " + status;
+    }
+
     public static EditText buildInput(Context context, String hint, boolean multiline) {
         EditText input = new EditText(context);
         input.setHint(hint);

android/app/src/main/java/com/hyzq/boss/ProjectChatUiState.java

@@ -162,6 +162,51 @@ public final class ProjectChatUiState {
         return truncate(lastBody, 28);
     }
 
+    public static String labelForAttachmentAnalysisState(@Nullable String analysisState) {
+        if ("queued_auto".equals(analysisState) || "ready_manual".equals(analysisState)) {
+            return "待分析";
+        }
+        if ("processing".equals(analysisState)) {
+            return "分析中";
+        }
+        if ("completed".equals(analysisState)) {
+            return "已分析";
+        }
+        if ("failed".equals(analysisState)) {
+            return "分析失败";
+        }
+        return "已发送";
+    }
+
+    public static String labelForAttachmentKind(@Nullable String attachmentKind) {
+        if ("image".equals(attachmentKind)) {
+            return "图片";
+        }
+        if ("video".equals(attachmentKind)) {
+            return "视频";
+        }
+        if ("pdf".equals(attachmentKind)) {
+            return "PDF";
+        }
+        if ("office".equals(attachmentKind)) {
+            return "文档";
+        }
+        if ("text".equals(attachmentKind)) {
+            return "文本";
+        }
+        return "文件";
+    }
+
+    public static String formatAttachmentSize(long fileSizeBytes) {
+        if (fileSizeBytes >= 1024L * 1024L) {
+            return String.format(java.util.Locale.US, "%.1f MB", fileSizeBytes / (1024f * 1024f));
+        }
+        if (fileSizeBytes >= 1024L) {
+            return Math.max(1, Math.round(fileSizeBytes / 1024f)) + " KB";
+        }
+        return Math.max(fileSizeBytes, 0L) + " B";
+    }
+
     private static boolean isBlank(@Nullable String value) {
         return value == null || value.trim().isEmpty();
     }

android/app/src/main/java/com/hyzq/boss/ProjectDetailActivity.java

@@ -3,10 +3,14 @@ package com.hyzq.boss;
 import android.content.ClipData;
 import android.content.ClipboardManager;
 import android.content.Intent;
+import android.database.Cursor;
+import android.net.Uri;
 import android.os.Bundle;
+import android.provider.OpenableColumns;
 import android.text.Editable;
 import android.text.TextUtils;
 import android.text.TextWatcher;
+import android.view.Gravity;
 import android.view.View;
 import android.widget.Button;
 import android.widget.EditText;
@@ -21,6 +25,8 @@ import androidx.appcompat.app.AlertDialog;
 import org.json.JSONArray;
 import org.json.JSONObject;
 
+import java.io.ByteArrayOutputStream;
+import java.io.InputStream;
 import java.util.ArrayList;
 import java.util.List;
 
@@ -35,6 +41,7 @@ public class ProjectDetailActivity extends BossScreenActivity {
     private LinearLayout quickActionsLayout;
     private LinearLayout composerRow;
     private LinearLayout multiSelectActionsLayout;
+    private Button composerAttachmentButton;
     private EditText composerInput;
     private Button composerSendButton;
     private Button multiSelectForwardButton;
@@ -49,6 +56,9 @@ public class ProjectDetailActivity extends BossScreenActivity {
     private ProjectChatUiState.SelectionState selectionState = ProjectChatUiState.emptySelection();
     private ActivityResultLauncher<Intent> conversationInfoLauncher;
     private ActivityResultLauncher<Intent> forwardTargetLauncher;
+    private ActivityResultLauncher<String> imagePickerLauncher;
+    private ActivityResultLauncher<String> videoPickerLauncher;
+    private ActivityResultLauncher<String> filePickerLauncher;
 
     static final class ChromeBindings {
         final boolean multiSelecting;
@@ -100,6 +110,7 @@ public class ProjectDetailActivity extends BossScreenActivity {
         quickActionsLayout = findViewById(R.id.project_chat_quick_actions);
         composerRow = findViewById(R.id.project_chat_composer_row);
         multiSelectActionsLayout = findViewById(R.id.project_chat_multi_select_actions);
+        composerAttachmentButton = findViewById(R.id.project_chat_attach);
         composerInput = findViewById(R.id.project_chat_input);
         composerSendButton = findViewById(R.id.project_chat_send);
         multiSelectForwardButton = findViewById(R.id.project_chat_multi_forward);
@@ -131,8 +142,23 @@ public class ProjectDetailActivity extends BossScreenActivity {
                     reload(true);
                 }
         );
+        imagePickerLauncher = registerForActivityResult(
+                new ActivityResultContracts.GetContent(),
+                uri -> onAttachmentPicked(uri, "image")
+        );
+        videoPickerLauncher = registerForActivityResult(
+                new ActivityResultContracts.GetContent(),
+                uri -> onAttachmentPicked(uri, "video")
+        );
+        filePickerLauncher = registerForActivityResult(
+                new ActivityResultContracts.GetContent(),
+                uri -> onAttachmentPicked(uri, "file")
+        );
 
         updateProjectHeader(initialProjectName == null ? "项目详情" : initialProjectName, "正在同步项目详情...");
+        if (composerAttachmentButton != null) {
+            composerAttachmentButton.setOnClickListener(v -> showAttachmentEntrySheet());
+        }
         composerSendButton.setOnClickListener(v -> sendTextMessageFromComposer());
         multiSelectForwardButton.setOnClickListener(v -> {
             if (!ProjectChatUiState.canForwardSelection(selectionState)) {
@@ -203,6 +229,9 @@ public class ProjectDetailActivity extends BossScreenActivity {
     @Override
     protected void setRefreshing(boolean refreshing) {
         super.setRefreshing(refreshing);
+        if (composerAttachmentButton != null) {
+            composerAttachmentButton.setEnabled(!refreshing && !composerSending);
+        }
         if (composerInput != null) {
             composerInput.setEnabled(!refreshing);
         }
@@ -297,6 +326,62 @@ public class ProjectDetailActivity extends BossScreenActivity {
         sendProjectMessage("text", body);
     }
 
+    private void showAttachmentEntrySheet() {
+        if (isComposerBusy()) {
+            return;
+        }
+        AlertDialog dialog = new AlertDialog.Builder(this)
+                .setItems(new CharSequence[]{"图片", "视频", "文件"}, (sheet, which) -> {
+                    if (which == 0) {
+                        imagePickerLauncher.launch("image/*");
+                    } else if (which == 1) {
+                        videoPickerLauncher.launch("video/*");
+                    } else {
+                        filePickerLauncher.launch("*/*");
+                    }
+                })
+                .create();
+        dialog.show();
+        if (dialog.getWindow() != null) {
+            dialog.getWindow().setGravity(Gravity.BOTTOM);
+        }
+    }
+
+    private void onAttachmentPicked(@Nullable Uri uri, String sourceType) {
+        if (uri == null) {
+            return;
+        }
+        setRefreshing(true);
+        executor.execute(() -> {
+            try {
+                AttachmentComposerState.PendingAttachment attachment = readPendingAttachment(uri, sourceType);
+                runOnUiThread(() -> {
+                    setRefreshing(false);
+                    if (attachment.requiresConfirmation()) {
+                        showAttachmentConfirmDialog(attachment);
+                    } else {
+                        uploadAttachment(attachment);
+                    }
+                });
+            } catch (Exception error) {
+                runOnUiThread(() -> {
+                    setRefreshing(false);
+                    showMessage("读取附件失败：" + error.getMessage());
+                });
+            }
+        });
+    }
+
+    private void showAttachmentConfirmDialog(AttachmentComposerState.PendingAttachment attachment) {
+        String actionLabel = "image".equals(attachment.sourceType) ? "图片" : "视频";
+        new AlertDialog.Builder(this)
+                .setTitle("发送" + actionLabel)
+                .setMessage(attachment.fileName + " · " + ProjectChatUiState.formatAttachmentSize(attachment.fileSizeBytes))
+                .setNegativeButton("取消", null)
+                .setPositiveButton("发送", (dialog, which) -> uploadAttachment(attachment))
+                .show();
+    }
+
     private void sendProjectMessage(String kind, String body) {
         composerSending = true;
         updateComposerSendButtonState();
@@ -327,6 +412,61 @@ public class ProjectDetailActivity extends BossScreenActivity {
         });
     }
 
+    private void uploadAttachment(AttachmentComposerState.PendingAttachment attachment) {
+        composerSending = true;
+        updateComposerSendButtonState();
+        setRefreshing(true);
+        appendPendingOutgoingAttachment(attachment);
+        scrollChatToBottom();
+        executor.execute(() -> {
+            try {
+                BossApiClient.ApiResponse uploadResponse = apiClient.uploadAttachment(
+                        projectId,
+                        attachment.fileName,
+                        attachment.mimeType,
+                        attachment.bytes,
+                        attachment.sourceType
+                );
+                if (!uploadResponse.ok()) {
+                    throw new IllegalStateException(uploadResponse.message());
+                }
+
+                String successMessage = "附件已发送";
+                JSONObject uploadedAttachment = uploadResponse.json.optJSONObject("attachment");
+                if (uploadedAttachment != null && attachment.requiresConfirmation()) {
+                    String attachmentId = uploadedAttachment.optString("attachmentId", "");
+                    String analysisState = uploadedAttachment.optString("analysisState", "");
+                    if (!TextUtils.isEmpty(attachmentId)
+                            && ("ready_manual".equals(analysisState) || "failed".equals(analysisState))) {
+                        try {
+                            BossApiClient.ApiResponse analyzeResponse = apiClient.analyzeAttachment(projectId, attachmentId);
+                            successMessage = analyzeResponse.ok()
+                                    ? "附件已发送，分析已发起"
+                                    : "附件已发送，分析稍后可用";
+                        } catch (Exception ignored) {
+                            successMessage = "附件已发送，分析稍后可用";
+                        }
+                    }
+                }
+
+                String finalSuccessMessage = successMessage;
+                runOnUiThread(() -> {
+                    composerSending = false;
+                    showMessage(finalSuccessMessage);
+                    reload(true);
+                });
+            } catch (Exception error) {
+                runOnUiThread(() -> {
+                    composerSending = false;
+                    setRefreshing(false);
+                    removePendingOutgoingBubble();
+                    showMessage("附件发送失败：" + error.getMessage());
+                    updateComposerSendButtonState();
+                });
+            }
+        });
+    }
+
     private void openGoals() {
         Intent intent = new Intent(this, ProjectGoalsActivity.class);
         intent.putExtra(ProjectGoalsActivity.EXTRA_PROJECT_ID, projectId);
@@ -362,6 +502,9 @@ public class ProjectDetailActivity extends BossScreenActivity {
 
         View messageView;
         switch (kind) {
+            case "attachment":
+                messageView = buildAttachmentMessageView(message, senderLabel, meta, outgoing);
+                break;
             case "forward_single":
                 messageView = BossUi.buildForwardSingleBubble(
                         this,
@@ -397,6 +540,42 @@ public class ProjectDetailActivity extends BossScreenActivity {
         return messageView;
     }
 
+    private View buildAttachmentMessageView(
+            JSONObject message,
+            String senderLabel,
+            String meta,
+            boolean outgoing
+    ) {
+        JSONObject attachment = firstAttachment(message);
+        if (attachment == null) {
+            return BossUi.buildMessageBubble(
+                    this,
+                    senderLabel,
+                    message.optString("body", "已发送附件"),
+                    meta,
+                    outgoing,
+                    "附件"
+            );
+        }
+        String sourceType = resolveAttachmentSourceType(
+                attachment.optString("attachmentKind", ""),
+                attachment.optString("mimeType", "")
+        );
+        String detail = ("image".equals(sourceType) || "video".equals(sourceType))
+                ? null
+                : ProjectChatUiState.formatAttachmentSize(attachment.optLong("fileSizeBytes", 0L));
+        return BossUi.buildAttachmentMessageCard(
+                this,
+                senderLabel,
+                sourceType,
+                attachment.optString("fileName", "attachment"),
+                detail,
+                ProjectChatUiState.labelForAttachmentAnalysisState(attachment.optString("analysisState", "")),
+                meta,
+                outgoing
+        );
+    }
+
     private void bindMessageInteractions(View messageView, String messageId, String body) {
         if (messageView == null || TextUtils.isEmpty(messageId)) {
             return;
@@ -611,6 +790,31 @@ public class ProjectDetailActivity extends BossScreenActivity {
         appendContent(pendingOutgoingBubble);
     }
 
+    private void appendPendingOutgoingAttachment(AttachmentComposerState.PendingAttachment attachment) {
+        if (contentLayout == null) {
+            return;
+        }
+        removePendingOutgoingBubble();
+        if (contentLayout.getChildCount() == 1 && contentLayout.getChildAt(0) instanceof android.widget.TextView) {
+            contentLayout.removeAllViews();
+        }
+        String senderLabel = TextUtils.isEmpty(apiClient.getDisplayName()) ? "你" : apiClient.getDisplayName();
+        String detail = attachment.requiresConfirmation()
+                ? null
+                : ProjectChatUiState.formatAttachmentSize(attachment.fileSizeBytes);
+        pendingOutgoingBubble = BossUi.buildAttachmentMessageCard(
+                this,
+                senderLabel,
+                attachment.sourceType,
+                attachment.fileName,
+                detail,
+                "发送中",
+                null,
+                true
+        );
+        appendContent(pendingOutgoingBubble);
+    }
+
     private void removePendingOutgoingBubble() {
         if (pendingOutgoingBubble != null && pendingOutgoingBubble.getParent() != null && contentLayout != null) {
             contentLayout.removeView(pendingOutgoingBubble);
@@ -707,6 +911,106 @@ public class ProjectDetailActivity extends BossScreenActivity {
         return message.optString("body", "转发的聊天记录");
     }
 
+    @Nullable
+    private JSONObject firstAttachment(JSONObject message) {
+        JSONArray attachments = message.optJSONArray("attachments");
+        if (attachments == null || attachments.length() == 0) {
+            return null;
+        }
+        return attachments.optJSONObject(0);
+    }
+
+    private String resolveAttachmentSourceType(String attachmentKind, String mimeType) {
+        if ("image".equals(attachmentKind) || (!TextUtils.isEmpty(mimeType) && mimeType.startsWith("image/"))) {
+            return "image";
+        }
+        if ("video".equals(attachmentKind) || (!TextUtils.isEmpty(mimeType) && mimeType.startsWith("video/"))) {
+            return "video";
+        }
+        return "file";
+    }
+
+    private AttachmentComposerState.PendingAttachment readPendingAttachment(Uri uri, String sourceType) throws Exception {
+        String fileName = resolveAttachmentFileName(uri);
+        String mimeType = resolveAttachmentMimeType(uri, sourceType);
+        byte[] bytes;
+        try (InputStream inputStream = getContentResolver().openInputStream(uri)) {
+            if (inputStream == null) {
+                throw new IllegalStateException("无法打开附件输入流");
+            }
+            bytes = readAllBytes(inputStream);
+        }
+        long fileSize = resolveAttachmentFileSize(uri, bytes.length);
+        return new AttachmentComposerState.PendingAttachment(sourceType, fileName, mimeType, fileSize, bytes);
+    }
+
+    private String resolveAttachmentFileName(Uri uri) {
+        String fallback = uri.getLastPathSegment();
+        try (Cursor cursor = getContentResolver().query(
+                uri,
+                new String[]{OpenableColumns.DISPLAY_NAME},
+                null,
+                null,
+                null
+        )) {
+            if (cursor != null && cursor.moveToFirst()) {
+                int columnIndex = cursor.getColumnIndex(OpenableColumns.DISPLAY_NAME);
+                if (columnIndex >= 0) {
+                    String displayName = cursor.getString(columnIndex);
+                    if (!TextUtils.isEmpty(displayName)) {
+                        return displayName;
+                    }
+                }
+            }
+        }
+        return TextUtils.isEmpty(fallback) ? "attachment" : fallback;
+    }
+
+    private long resolveAttachmentFileSize(Uri uri, long fallback) {
+        try (Cursor cursor = getContentResolver().query(
+                uri,
+                new String[]{OpenableColumns.SIZE},
+                null,
+                null,
+                null
+        )) {
+            if (cursor != null && cursor.moveToFirst()) {
+                int columnIndex = cursor.getColumnIndex(OpenableColumns.SIZE);
+                if (columnIndex >= 0) {
+                    long value = cursor.getLong(columnIndex);
+                    if (value > 0) {
+                        return value;
+                    }
+                }
+            }
+        }
+        return fallback;
+    }
+
+    private String resolveAttachmentMimeType(Uri uri, String sourceType) {
+        String mimeType = getContentResolver().getType(uri);
+        if (!TextUtils.isEmpty(mimeType)) {
+            return mimeType;
+        }
+        if ("image".equals(sourceType)) {
+            return "image/*";
+        }
+        if ("video".equals(sourceType)) {
+            return "video/*";
+        }
+        return "application/octet-stream";
+    }
+
+    private byte[] readAllBytes(InputStream inputStream) throws Exception {
+        ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
+        byte[] buffer = new byte[8192];
+        int read;
+        while ((read = inputStream.read(buffer)) != -1) {
+            outputStream.write(buffer, 0, read);
+        }
+        return outputStream.toByteArray();
+    }
+
     static ChromeBindings buildChromeBindings(
             ProjectChatUiState.ChromeState chromeState,
             boolean composerBusy

android/app/src/main/res/layout/activity_project_chat.xml

@@ -135,6 +135,19 @@
         android:paddingRight="12dp"
         android:paddingBottom="12dp">
 
+        <Button
+            android:id="@+id/project_chat_attach"
+            android:layout_width="44dp"
+            android:layout_height="44dp"
+            android:layout_marginRight="8dp"
+            android:background="@drawable/bg_secondary_button"
+            android:minWidth="0dp"
+            android:text="+"
+            android:textAllCaps="false"
+            android:textColor="@color/boss_text_primary"
+            android:textSize="20sp"
+            android:textStyle="bold" />
+
         <EditText
             android:id="@+id/project_chat_input"
             android:layout_width="0dp"

android/app/src/test/java/com/hyzq/boss/AttachmentComposerStateTest.java

@@ -0,0 +1,50 @@
+package com.hyzq.boss;
+
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertTrue;
+
+import org.junit.Test;
+
+public class AttachmentComposerStateTest {
+    @Test
+    public void imageAttachments_requireConfirmationBeforeSending() {
+        AttachmentComposerState.PendingAttachment attachment =
+                new AttachmentComposerState.PendingAttachment(
+                        "image",
+                        "现场照片.png",
+                        "image/png",
+                        4096L,
+                        new byte[] {1, 2, 3}
+                );
+
+        assertTrue(attachment.requiresConfirmation());
+    }
+
+    @Test
+    public void videoAttachments_requireConfirmationBeforeSending() {
+        AttachmentComposerState.PendingAttachment attachment =
+                new AttachmentComposerState.PendingAttachment(
+                        "video",
+                        "巡检录屏.mp4",
+                        "video/mp4",
+                        8192L,
+                        new byte[] {4, 5, 6}
+                );
+
+        assertTrue(attachment.requiresConfirmation());
+    }
+
+    @Test
+    public void fileAttachments_doNotRequireConfirmation() {
+        AttachmentComposerState.PendingAttachment attachment =
+                new AttachmentComposerState.PendingAttachment(
+                        "file",
+                        "日报.xlsx",
+                        "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet",
+                        16384L,
+                        new byte[] {7, 8, 9}
+                );
+
+        assertFalse(attachment.requiresConfirmation());
+    }
+}

android/app/src/test/java/com/hyzq/boss/BossApiClientAttachmentTest.java

@@ -0,0 +1,261 @@
+package com.hyzq.boss;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertTrue;
+
+import android.content.SharedPreferences;
+
+import org.json.JSONObject;
+import org.junit.Test;
+
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.net.HttpURLConnection;
+import java.net.ProtocolException;
+import java.net.URL;
+import java.nio.charset.StandardCharsets;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+
+public class BossApiClientAttachmentTest {
+    @Test
+    public void uploadAttachment_postsMultipartBodyWithSourceType() throws Exception {
+        RecordingConnection connection = new RecordingConnection(
+                new URL("https://boss.hyzq.net/api/v1/projects/project-1/attachments")
+        );
+        RecordingBossApiClient apiClient = new RecordingBossApiClient(connection);
+
+        BossApiClient.ApiResponse response = apiClient.uploadAttachment(
+                "project-1",
+                "现场照片.png",
+                "image/png",
+                new byte[] {1, 2, 3, 4},
+                "image"
+        );
+
+        assertEquals(200, response.statusCode);
+        assertEquals("/api/v1/projects/project-1/attachments", apiClient.lastPath);
+        assertEquals("POST", connection.requestMethodValue);
+        assertTrue(connection.contentTypeValue.startsWith("multipart/form-data; boundary="));
+        assertTrue(connection.requestBody().contains("name=\"sourceType\""));
+        assertTrue(connection.requestBody().contains("\r\nimage\r\n"));
+        assertTrue(connection.requestBody().contains("name=\"file\"; filename=\"现场照片.png\""));
+        assertTrue(connection.requestBody().contains("Content-Type: image/png"));
+    }
+
+    @Test
+    public void analyzeAttachment_postsToAnalyzeEndpoint() throws Exception {
+        RecordingConnection connection = new RecordingConnection(
+                new URL("https://boss.hyzq.net/api/v1/projects/project-1/attachments/att-1/analyze")
+        );
+        RecordingBossApiClient apiClient = new RecordingBossApiClient(connection);
+
+        BossApiClient.ApiResponse response = apiClient.analyzeAttachment("project-1", "att-1");
+
+        assertEquals(200, response.statusCode);
+        assertEquals("/api/v1/projects/project-1/attachments/att-1/analyze", apiClient.lastPath);
+        assertEquals("POST", connection.requestMethodValue);
+        assertEquals("{}", connection.requestBody());
+    }
+
+    private static final class RecordingBossApiClient extends BossApiClient {
+        private final RecordingConnection connection;
+        private String lastPath = "";
+
+        RecordingBossApiClient(RecordingConnection connection) {
+            super(new InMemorySharedPreferences(), "https://boss.hyzq.net");
+            this.connection = connection;
+        }
+
+        @Override
+        HttpURLConnection openConnection(String path) {
+            lastPath = path;
+            return connection;
+        }
+
+        @Override
+        String encode(String value) {
+            return value;
+        }
+
+        @Override
+        void rememberIdentity(JSONObject json) {
+            // JVM 单测不需要落 Android 侧身份缓存。
+        }
+    }
+
+    private static final class RecordingConnection extends HttpURLConnection {
+        private final ByteArrayOutputStream requestBody = new ByteArrayOutputStream();
+        private final Map<String, String> requestHeaders = new HashMap<>();
+        private String requestMethodValue = "GET";
+        private String contentTypeValue = "";
+
+        RecordingConnection(URL url) {
+            super(url);
+        }
+
+        @Override
+        public void disconnect() {}
+
+        @Override
+        public boolean usingProxy() {
+            return false;
+        }
+
+        @Override
+        public void connect() {}
+
+        @Override
+        public void setRequestMethod(String method) throws ProtocolException {
+            requestMethodValue = method;
+        }
+
+        @Override
+        public void setRequestProperty(String key, String value) {
+            requestHeaders.put(key, value);
+            if ("Content-Type".equalsIgnoreCase(key)) {
+                contentTypeValue = value;
+            }
+        }
+
+        @Override
+        public String getRequestProperty(String key) {
+            return requestHeaders.get(key);
+        }
+
+        @Override
+        public OutputStream getOutputStream() {
+            return requestBody;
+        }
+
+        @Override
+        public int getResponseCode() {
+            return 200;
+        }
+
+        @Override
+        public InputStream getInputStream() {
+            return new ByteArrayInputStream("{\"ok\":true}".getBytes(StandardCharsets.UTF_8));
+        }
+
+        @Override
+        public Map<String, List<String>> getHeaderFields() {
+            return Collections.emptyMap();
+        }
+
+        String requestBody() {
+            return requestBody.toString(StandardCharsets.UTF_8);
+        }
+    }
+
+    private static final class InMemorySharedPreferences implements SharedPreferences {
+        private final Map<String, String> values = new HashMap<>();
+
+        @Override
+        public Map<String, ?> getAll() {
+            return Collections.unmodifiableMap(values);
+        }
+
+        @Override
+        public String getString(String key, String defValue) {
+            return values.getOrDefault(key, defValue);
+        }
+
+        @Override
+        public Set<String> getStringSet(String key, Set<String> defValues) {
+            throw new UnsupportedOperationException();
+        }
+
+        @Override
+        public int getInt(String key, int defValue) {
+            throw new UnsupportedOperationException();
+        }
+
+        @Override
+        public long getLong(String key, long defValue) {
+            throw new UnsupportedOperationException();
+        }
+
+        @Override
+        public float getFloat(String key, float defValue) {
+            throw new UnsupportedOperationException();
+        }
+
+        @Override
+        public boolean getBoolean(String key, boolean defValue) {
+            throw new UnsupportedOperationException();
+        }
+
+        @Override
+        public boolean contains(String key) {
+            return values.containsKey(key);
+        }
+
+        @Override
+        public Editor edit() {
+            return new Editor() {
+                @Override
+                public Editor putString(String key, String value) {
+                    values.put(key, value);
+                    return this;
+                }
+
+                @Override
+                public Editor remove(String key) {
+                    values.remove(key);
+                    return this;
+                }
+
+                @Override
+                public Editor clear() {
+                    values.clear();
+                    return this;
+                }
+
+                @Override
+                public void apply() {}
+
+                @Override
+                public boolean commit() {
+                    return true;
+                }
+
+                @Override
+                public Editor putStringSet(String key, Set<String> values) {
+                    throw new UnsupportedOperationException();
+                }
+
+                @Override
+                public Editor putInt(String key, int value) {
+                    throw new UnsupportedOperationException();
+                }
+
+                @Override
+                public Editor putLong(String key, long value) {
+                    throw new UnsupportedOperationException();
+                }
+
+                @Override
+                public Editor putFloat(String key, float value) {
+                    throw new UnsupportedOperationException();
+                }
+
+                @Override
+                public Editor putBoolean(String key, boolean value) {
+                    throw new UnsupportedOperationException();
+                }
+            };
+        }
+
+        @Override
+        public void registerOnSharedPreferenceChangeListener(OnSharedPreferenceChangeListener listener) {}
+
+        @Override
+        public void unregisterOnSharedPreferenceChangeListener(OnSharedPreferenceChangeListener listener) {}
+    }
+}