support rich issue comment links

app/src/main/java/ai/multica/app/ComposePilotActivity.kt

@@ -1472,6 +1472,9 @@ private fun ComposePilotShell(
     var issueDetailId by remember(session.workspace.id, initialIssueId) {
         mutableStateOf(initialIssueId?.takeIf { it.isNotBlank() })
     }
+    var issueDetailBackStack by remember(session.workspace.id, initialIssueId) {
+        mutableStateOf<List<String>>(emptyList())
+    }
     var projectDetail by remember { mutableStateOf<Models.Project?>(null) }
     var issueFormOpen by remember { mutableStateOf(false) }
     var issueFormIssue by remember { mutableStateOf<Models.Issue?>(null) }
@@ -1499,6 +1502,39 @@ private fun ComposePilotShell(
         }
     }
 
+    fun clearIssueDetail() {
+        issueDetailId = null
+        issueDetailBackStack = emptyList()
+        inboxIssueContext = null
+    }
+
+    fun openIssueDetail(issueId: String, preserveCurrent: Boolean = false) {
+        val currentIssueId = issueDetailId
+        if (preserveCurrent && !currentIssueId.isNullOrBlank() && currentIssueId != issueId) {
+            issueDetailBackStack = issueDetailBackStack + currentIssueId
+        } else if (!preserveCurrent) {
+            issueDetailBackStack = emptyList()
+        }
+        issueDetailId = issueId
+        inboxIssueContext = null
+    }
+
+    fun closeIssueDetail() {
+        if (issueDetailBackStack.isNotEmpty()) {
+            val previousIssueId = issueDetailBackStack.last()
+            issueDetailBackStack = issueDetailBackStack.dropLast(1)
+            issueDetailId = previousIssueId
+            inboxIssueContext = null
+            return
+        }
+        if (inboxIssueContext != null) tabRefresh++
+        clearIssueDetail()
+        if (returnToSearchAfterDetail) {
+            searchOpen = true
+            returnToSearchAfterDetail = false
+        }
+    }
+
     LaunchedEffect(selectedTab, session.workspace.id, tabRefresh) {
         if (issueDetailId != null || projectDetail != null || searchOpen || chatOpen || settingsPage != null || profileOpen) return@LaunchedEffect
         val currentTabState = tabState
@@ -1569,13 +1605,7 @@ private fun ComposePilotShell(
             chatSession != null -> chatSession = null
             chatOpen -> chatOpen = false
             issueDetailId != null -> {
-                if (inboxIssueContext != null) tabRefresh++
+                closeIssueDetail()
-                issueDetailId = null
-                inboxIssueContext = null
-                if (returnToSearchAfterDetail) {
-                    searchOpen = true
-                    returnToSearchAfterDetail = false
-                }
             }
             projectDetail != null -> {
                 projectDetail = null
@@ -1600,6 +1630,7 @@ private fun ComposePilotShell(
             selectedTab = MulticaTab.Settings
             settingsPage = PilotSettingsPage.WorkspaceDetails
             issueDetailId = null
+            issueDetailBackStack = emptyList()
             inboxIssueContext = null
             returnToSearchAfterDetail = false
             projectDetail = null
@@ -1615,6 +1646,7 @@ private fun ComposePilotShell(
         onSearchClick = {
             searchOpen = true
             issueDetailId = null
+            issueDetailBackStack = emptyList()
             inboxIssueContext = null
             returnToSearchAfterDetail = false
             projectDetail = null
@@ -1630,6 +1662,7 @@ private fun ComposePilotShell(
         onChatClick = {
             selectedTab = MulticaTab.Inbox
             issueDetailId = null
+            issueDetailBackStack = emptyList()
             inboxIssueContext = null
             returnToSearchAfterDetail = false
             projectDetail = null
@@ -1646,6 +1679,7 @@ private fun ComposePilotShell(
         onTabClick = {
             selectedTab = it
             issueDetailId = null
+            issueDetailBackStack = emptyList()
             inboxIssueContext = null
             returnToSearchAfterDetail = false
             projectDetail = null
@@ -1685,6 +1719,7 @@ private fun ComposePilotShell(
                     projectDetail = null
                     chatOpen = false
                     chatSession = null
+                    issueDetailBackStack = emptyList()
                     issueDetailId = saved.id
                     tabRefresh++
                 },
@@ -1699,8 +1734,7 @@ private fun ComposePilotShell(
                 onBack = { searchOpen = false },
                 onIssueClick = {
                     searchOpen = false
-                    issueDetailId = it
+                    openIssueDetail(it)
-                    inboxIssueContext = null
                     returnToSearchAfterDetail = true
                 },
                 onProjectClick = {
@@ -1763,18 +1797,10 @@ private fun ComposePilotShell(
                 currentUser = session.user,
                 zh = zh,
                 onBack = {
-                    if (activeInboxContext != null) tabRefresh++
+                    closeIssueDetail()
-                    issueDetailId = null
-                    inboxIssueContext = null
-                    if (returnToSearchAfterDetail) {
-                        searchOpen = true
-                        returnToSearchAfterDetail = false
-                    }
                 },
                 onOpenIssue = {
-                    issueDetailId = it
+                    openIssueDetail(it, preserveCurrent = true)
-                    inboxIssueContext = null
-                    returnToSearchAfterDetail = false
                 },
                 onEditIssue = {
                     issueFormIssue = it
@@ -1789,8 +1815,7 @@ private fun ComposePilotShell(
                     issueFormOpen = true
                 },
                 onDeleted = {
-                    issueDetailId = null
+                    clearIssueDetail()
-                    inboxIssueContext = null
                     returnToSearchAfterDetail = false
                     tabRefresh++
                 },
@@ -1798,6 +1823,7 @@ private fun ComposePilotShell(
                 inboxItemId = activeInboxContext?.itemId,
                 inboxNextIssueId = activeInboxContext?.nextIssueId,
                 onInboxDone = { nextIssueId ->
+                    issueDetailBackStack = emptyList()
                     issueDetailId = nextIssueId.takeIf { !it.isNullOrBlank() }
                     inboxIssueContext = null
                     tabRefresh++
@@ -1817,7 +1843,7 @@ private fun ComposePilotShell(
                     }
                 },
                 onIssueClick = {
-                    issueDetailId = it
+                    openIssueDetail(it)
                     returnToSearchAfterDetail = false
                 },
             )
@@ -1831,11 +1857,12 @@ private fun ComposePilotShell(
                 authStore = authStore,
                 selectedIssueIds = selectedIssueIds,
                 onSelectedIssueIdsChange = { selectedIssueIds = it },
-                onIssueClick = { issueDetailId = it },
+                onIssueClick = { openIssueDetail(it) },
                 onInboxIssueClick = { item, nextIssueId ->
                     if (item.issueId.isNotBlank()) {
                         markInboxReadOnOpen(item)
                         selectedTab = MulticaTab.Inbox
+                        issueDetailBackStack = emptyList()
                         issueDetailId = item.issueId
                         inboxIssueContext = InboxIssueContext(
                             itemId = item.id,
@@ -4503,6 +4530,8 @@ private fun issueStatusIcon(status: String?): ImageVector = when (status) {
     else -> Icons.Outlined.Archive
 }
 
+private fun issueBoardStatusValues(): List<String> = Models.STATUS_VALUES.filter { it != "cancelled" }
+
 private fun sortIssues(
     issues: List<Models.Issue>,
     option: IssueSortOption,
@@ -5718,10 +5747,11 @@ private fun PilotIssues(
 
     fun moveBoardIssue(issue: Models.Issue, direction: Int) {
         if (movingBoardIssueId != null || direction == 0) return
-        val currentIndex = Models.STATUS_VALUES.indexOf(issue.status).takeIf { it >= 0 } ?: return
+        val boardStatuses = issueBoardStatusValues()
-        val targetIndex = (currentIndex + direction).coerceIn(0, Models.STATUS_VALUES.lastIndex)
+        val currentIndex = boardStatuses.indexOf(issue.status).takeIf { it >= 0 } ?: return
+        val targetIndex = (currentIndex + direction).coerceIn(0, boardStatuses.lastIndex)
         if (targetIndex == currentIndex) return
-        val targetStatus = Models.STATUS_VALUES[targetIndex]
+        val targetStatus = boardStatuses[targetIndex]
         movingBoardIssueId = issue.id
         batchMessage = null
         scope.launch {
@@ -6425,7 +6455,7 @@ private fun PilotIssueBoard(
             .padding(top = 8.dp),
         horizontalArrangement = Arrangement.spacedBy(10.dp),
     ) {
-        items(Models.STATUS_VALUES) { status ->
+        items(issueBoardStatusValues()) { status ->
             val bucket = grouped[status].orEmpty()
             Surface(
                 modifier = Modifier
@@ -8764,6 +8794,10 @@ private fun IssueCommentCard(
     authorName: String,
     authorAvatarUrl: String = "",
     authorAgentStatus: String? = null,
+    members: List<Models.Member> = emptyList(),
+    agents: List<Models.Agent> = emptyList(),
+    currentUser: Models.User? = null,
+    onIssueReferenceClick: ((String) -> Unit)? = null,
     expandedActions: Boolean,
     contentExpanded: Boolean,
     highlighted: Boolean,
@@ -8851,7 +8885,13 @@ private fun IssueCommentCard(
                             color = MulticaColors.Muted,
                         )
                     } else {
-                        MarkdownBlock(renderedContent)
+                        MarkdownBlock(
+                            renderedContent,
+                            members = members,
+                            agents = agents,
+                            currentUser = currentUser,
+                            onIssueReferenceClick = onIssueReferenceClick,
+                        )
                         if (collapseContent) {
                             MulticaPillButton(
                                 text = if (contentExpanded) {
@@ -9199,6 +9239,7 @@ private fun PilotIssueDetail(
     var confirmingDeleteIssue by remember(issueId) { mutableStateOf(false) }
     var deletingIssue by remember(issueId) { mutableStateOf(false) }
     var issueMutationMessage by remember(issueId) { mutableStateOf<String?>(null) }
+    var issueReferenceMessage by remember(issueId) { mutableStateOf<String?>(null) }
     var updatingIssueField by remember(issueId) { mutableStateOf<String?>(null) }
     var copyLinkMessage by remember(issueId) { mutableStateOf<String?>(null) }
     var issueMoreMenuOpen by remember(issueId) { mutableStateOf(false) }
@@ -9348,6 +9389,35 @@ private fun PilotIssueDetail(
                 }
             }
 
+            fun openIssueReference(identifier: String) {
+                if (identifier.equals(data.issue.identifier, ignoreCase = true)) return
+                issueReferenceMessage = null
+                scope.launch {
+                    val result = withContext(Dispatchers.IO) {
+                        runCatching { api.searchIssues(workspaceId, identifier, 10) }
+                    }
+                    result.onSuccess { issues ->
+                        val match = issues.firstOrNull { it.identifier.equals(identifier, ignoreCase = true) }
+                            ?: issues.firstOrNull()
+                        if (match == null) {
+                            issueReferenceMessage = if (zh) {
+                                "未找到 Issue $identifier"
+                            } else {
+                                "Issue $identifier was not found"
+                            }
+                        } else {
+                            onOpenIssue(match.id)
+                        }
+                    }.onFailure { error ->
+                        issueReferenceMessage = if (zh) {
+                            "打开 Issue $identifier 失败：${error.message ?: error.toString()}"
+                        } else {
+                            "Open Issue $identifier failed: ${error.message ?: error.toString()}"
+                        }
+                    }
+                }
+            }
+
             fun runCommentMutation(action: suspend () -> Unit) {
                 if (mutatingComment) return
                 mutatingComment = true
@@ -9805,9 +9875,24 @@ private fun PilotIssueDetail(
                         )
                     }
                 }
+                if (!issueReferenceMessage.isNullOrBlank()) {
+                    item {
+                        PilotInlineResultState(
+                            message = issueReferenceMessage.orEmpty(),
+                            isError = pilotInlineResultIsError(issueReferenceMessage.orEmpty()),
+                            contentDescription = "Issue Detail Reference Link Result Web Banner",
+                        )
+                    }
+                }
                 if (!data.issue.description.isNullOrBlank()) {
                     item {
-                        MarkdownBlock(data.issue.description)
+                        MarkdownBlock(
+                            data.issue.description,
+                            members = data.members,
+                            agents = data.agents,
+                            currentUser = currentUser,
+                            onIssueReferenceClick = { openIssueReference(it) },
+                        )
                     }
                 }
                 if (data.activeTasks.isNotEmpty() || data.runs.isNotEmpty()) {
@@ -9949,6 +10034,10 @@ private fun PilotIssueDetail(
                         authorName = authorName,
                         authorAvatarUrl = authorAvatarUrl,
                         authorAgentStatus = commentAuthorAgentStatus(comment, data.agents),
+                        members = data.members,
+                        agents = data.agents,
+                        currentUser = currentUser,
+                        onIssueReferenceClick = { openIssueReference(it) },
                         expandedActions = expandedCommentActionsId == comment.id,
                         contentExpanded = comment.id in expandedCommentContentIds,
                         highlighted = comment.id == highlightCommentId,
@@ -11354,10 +11443,38 @@ private fun PilotAgentTranscriptPreview() {
 }
 
 @Composable
-private fun MarkdownBlock(markdown: String) {
+private fun MarkdownBlock(
+    markdown: String,
+    members: List<Models.Member> = emptyList(),
+    agents: List<Models.Agent> = emptyList(),
+    currentUser: Models.User? = null,
+    onIssueReferenceClick: ((String) -> Unit)? = null,
+) {
     val textColor = MulticaColors.Text.toArgb()
     val mutedColor = MulticaColors.Muted.toArgb()
     val borderColor = MulticaColors.Border.toArgb()
+    val linkHandler = remember(members, agents, currentUser, onIssueReferenceClick) {
+        object : MarkdownRenderer.LinkHandler {
+            override fun resolveMentionLabel(
+                mentionType: String,
+                mentionId: String,
+                fallbackLabel: String,
+            ): String {
+                return IssueCommentRichText.mentionDisplayLabel(
+                    mentionType,
+                    mentionId,
+                    fallbackLabel,
+                    members,
+                    agents,
+                    currentUser,
+                )
+            }
+
+            override fun openIssueIdentifier(identifier: String) {
+                if (identifier.isNotBlank()) onIssueReferenceClick?.invoke(identifier)
+            }
+        }
+    }
     SelectionContainer(
         modifier = Modifier
             .fillMaxWidth()
@@ -11377,6 +11494,7 @@ private fun MarkdownBlock(markdown: String) {
                     textColor,
                     mutedColor,
                     borderColor,
+                    linkHandler,
                 )
             },
         )

app/src/main/java/ai/multica/app/FeatureSyncHelpers.java

@@ -8,6 +8,8 @@ import java.util.LinkedHashMap;
 import java.util.List;
 import java.util.Locale;
 import java.util.Map;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
 
 final class AgentMentionMarkdown {
     static String markdown(String name, String agentId) {
@@ -22,6 +24,114 @@ final class AgentMentionMarkdown {
     }
 }
 
+final class IssueCommentRichText {
+    private static final Pattern ISSUE_IDENTIFIER = Pattern.compile("[A-Z][A-Z0-9]+-\\d+");
+
+    static String mentionDisplayLabel(String mentionType, String mentionId, String fallbackLabel,
+                                      List<Models.Member> members, List<Models.Agent> agents,
+                                      Models.User currentUser) {
+        String resolved = resolveMentionName(mentionType, mentionId, members, agents, currentUser);
+        String label = resolved.isEmpty() ? cleanMentionFallback(fallbackLabel, mentionId) : resolved;
+        if (label.startsWith("@")) return label;
+        return "@" + label;
+    }
+
+    static int issueIdentifierEndAt(String value, int start) {
+        if (value == null || start < 0 || start >= value.length()) return -1;
+        Matcher matcher = ISSUE_IDENTIFIER.matcher(value);
+        matcher.region(start, value.length());
+        if (!matcher.lookingAt()) return -1;
+        int end = matcher.end();
+        if (!hasIdentifierBoundary(value, start, end)) return -1;
+        return end;
+    }
+
+    static List<String> issueIdentifiersOutsideCodeAndLinks(String value) {
+        ArrayList<String> identifiers = new ArrayList<>();
+        if (value == null || value.isEmpty()) return identifiers;
+        int i = 0;
+        while (i < value.length()) {
+            if (value.charAt(i) == '`') {
+                int end = value.indexOf('`', i + 1);
+                i = end > i ? end + 1 : i + 1;
+                continue;
+            }
+            int markdownLinkEnd = markdownLinkEndAt(value, i);
+            if (markdownLinkEnd > i) {
+                i = markdownLinkEnd;
+                continue;
+            }
+            int end = issueIdentifierEndAt(value, i);
+            if (end > i) {
+                identifiers.add(value.substring(i, end));
+                i = end;
+            } else {
+                i++;
+            }
+        }
+        return identifiers;
+    }
+
+    private static String resolveMentionName(String mentionType, String mentionId,
+                                             List<Models.Member> members, List<Models.Agent> agents,
+                                             Models.User currentUser) {
+        String type = mentionType == null ? "" : mentionType.toLowerCase(Locale.US);
+        String id = mentionId == null ? "" : mentionId;
+        if ("agent".equals(type)) {
+            for (Models.Agent agent : agents) {
+                if (id.equals(agent.id)) return clean(agent.name);
+            }
+        }
+        if ("member".equals(type) || "user".equals(type)) {
+            if (currentUser != null && id.equals(currentUser.id)) return clean(currentUser.name);
+            for (Models.Member member : members) {
+                if (id.equals(member.id) || id.equals(member.userId)) return clean(member.displayName);
+            }
+        }
+        for (Models.Agent agent : agents) {
+            if (id.equals(agent.id)) return clean(agent.name);
+        }
+        if (currentUser != null && id.equals(currentUser.id)) return clean(currentUser.name);
+        for (Models.Member member : members) {
+            if (id.equals(member.id) || id.equals(member.userId)) return clean(member.displayName);
+        }
+        return "";
+    }
+
+    private static String cleanMentionFallback(String fallbackLabel, String mentionId) {
+        String fallback = clean(fallbackLabel);
+        while (fallback.startsWith("@")) fallback = fallback.substring(1).trim();
+        return fallback.isEmpty() ? Models.shortId(mentionId) : fallback;
+    }
+
+    private static boolean hasIdentifierBoundary(String value, int start, int end) {
+        boolean left = start == 0 || !isIssueIdentifierNeighbor(value.charAt(start - 1));
+        boolean right = end >= value.length() || !isIssueIdentifierNeighbor(value.charAt(end));
+        return left && right;
+    }
+
+    private static boolean isIssueIdentifierNeighbor(char ch) {
+        return Character.isLetterOrDigit(ch) || ch == '_' || ch == '-';
+    }
+
+    private static int markdownLinkEndAt(String value, int start) {
+        if (start < 0 || start >= value.length() || value.charAt(start) != '[') return -1;
+        int labelEnd = value.indexOf("](", start + 1);
+        if (labelEnd <= start + 1) return -1;
+        int urlEnd = value.indexOf(')', labelEnd + 2);
+        return urlEnd > labelEnd ? urlEnd + 1 : -1;
+    }
+
+    private static String clean(String value) {
+        if (value == null) return "";
+        String trimmed = value.trim();
+        return "null".equalsIgnoreCase(trimmed) ? "" : trimmed;
+    }
+
+    private IssueCommentRichText() {
+    }
+}
+
 final class InboxNotificationDeduper {
     static List<Models.InboxItem> deduplicateByIssue(Collection<Models.InboxItem> items) {
         Map<String, Models.InboxItem> newestByIssue = new LinkedHashMap<>();

app/src/main/java/ai/multica/app/MainActivity.java

@@ -472,6 +472,7 @@ public final class MainActivity extends Activity {
         Map<String, List<Models.Issue>> grouped = new HashMap<>();
         for (Models.Issue issue : issues) grouped.computeIfAbsent(issue.status, k -> new ArrayList<>()).add(issue);
         for (String status : Models.STATUS_VALUES) {
+            if ("cancelled".equals(status)) continue;
             LinearLayout col = vertical();
             col.setPadding(dp(8), dp(8), dp(8), dp(8));
             col.setBackground(roundedStroke(0xFFF3F4F6, BORDER, 14, 1));

app/src/main/java/ai/multica/app/MarkdownRenderer.java

@@ -6,8 +6,12 @@ import android.graphics.Typeface;
 import android.text.SpannableStringBuilder;
 import android.text.Spanned;
 import android.text.method.LinkMovementMethod;
+import android.text.TextPaint;
+import android.text.style.ClickableSpan;
+import android.text.style.ForegroundColorSpan;
 import android.text.style.StyleSpan;
 import android.text.style.TypefaceSpan;
+import android.text.style.UnderlineSpan;
 import android.view.ViewGroup;
 import android.view.View;
 import android.widget.HorizontalScrollView;
@@ -22,6 +26,13 @@ import java.util.List;
 final class MarkdownRenderer {
     private MarkdownRenderer() {}
 
+    private static final int LINK_BLUE = 0xFF007AFF;
+
+    interface LinkHandler {
+        String resolveMentionLabel(String mentionType, String mentionId, String fallbackLabel);
+        void openIssueIdentifier(String identifier);
+    }
+
     static final class Palette {
         final int blockBackground;
         final int tableHeaderBackground;
@@ -43,6 +54,11 @@ final class MarkdownRenderer {
     }
 
     static void render(Context context, LinearLayout parent, String markdown, int textColor, int mutedColor, int borderColor) {
+        render(context, parent, markdown, textColor, mutedColor, borderColor, null);
+    }
+
+    static void render(Context context, LinearLayout parent, String markdown, int textColor, int mutedColor, int borderColor,
+                       LinkHandler linkHandler) {
         parent.removeAllViews();
         Palette palette = paletteFor(textColor, mutedColor, borderColor);
         if (markdown == null || markdown.trim().isEmpty()) {
@@ -59,7 +75,7 @@ final class MarkdownRenderer {
         for (int i = 0; i < lines.length; i++) {
             String line = lines[i];
             if (line.trim().startsWith("```")) {
-                flushParagraph(context, parent, paragraph, textColor);
+                flushParagraph(context, parent, paragraph, textColor, linkHandler);
                 if (inCode) {
                     addCodeBlock(context, parent, code.toString(), mutedColor, palette);
                     code.setLength(0);
@@ -75,7 +91,7 @@ final class MarkdownRenderer {
             }
 
             if (isTableStart(lines, i)) {
-                flushParagraph(context, parent, paragraph, textColor);
+                flushParagraph(context, parent, paragraph, textColor, linkHandler);
                 List<String> table = new ArrayList<>();
                 table.add(lines[i]);
                 i += 2;
@@ -84,35 +100,37 @@ final class MarkdownRenderer {
                     i++;
                 }
                 i--;
-                addTable(context, parent, table, textColor, mutedColor, borderColor, palette);
+                addTable(context, parent, table, textColor, mutedColor, borderColor, palette, linkHandler);
                 continue;
             }
 
             String trimmed = line.trim();
             if (trimmed.isEmpty()) {
-                flushParagraph(context, parent, paragraph, textColor);
+                flushParagraph(context, parent, paragraph, textColor, linkHandler);
             } else if (trimmed.matches("^(-{3,}|\\*{3,}|_{3,})$")) {
-                flushParagraph(context, parent, paragraph, textColor);
+                flushParagraph(context, parent, paragraph, textColor, linkHandler);
                 addDivider(context, parent, borderColor);
             } else if (trimmed.startsWith("#")) {
-                flushParagraph(context, parent, paragraph, textColor);
+                flushParagraph(context, parent, paragraph, textColor, linkHandler);
                 addHeading(context, parent, trimmed, textColor);
             } else if (trimmed.startsWith(">")) {
-                flushParagraph(context, parent, paragraph, textColor);
+                flushParagraph(context, parent, paragraph, textColor, linkHandler);
                 TextView quote = text(context, trimmed.replaceFirst("^>\\s?", ""), 15, mutedColor);
                 quote.setPadding(dp(context, 10), dp(context, 6), dp(context, 8), dp(context, 6));
                 quote.setBackgroundColor(palette.blockBackground);
                 parent.addView(quote);
             } else if (trimmed.startsWith("- ") || trimmed.startsWith("* ")) {
-                flushParagraph(context, parent, paragraph, textColor);
+                flushParagraph(context, parent, paragraph, textColor, linkHandler);
                 TextView bullet = text(context, "• " + trimmed.substring(2), 15, textColor);
+                bullet.setText(applyInline(bullet.getText().toString(), linkHandler));
+                bullet.setMovementMethod(LinkMovementMethod.getInstance());
                 bullet.setPadding(dp(context, 8), dp(context, 2), 0, dp(context, 2));
                 parent.addView(bullet);
             } else {
                 paragraph.add(line);
             }
         }
-        flushParagraph(context, parent, paragraph, textColor);
+        flushParagraph(context, parent, paragraph, textColor, linkHandler);
         if (code.length() > 0) addCodeBlock(context, parent, code.toString(), mutedColor, palette);
     }
 
@@ -124,10 +142,11 @@ final class MarkdownRenderer {
                 && divider.matches("^\\|?\\s*:?-{3,}:?\\s*(\\|\\s*:?-{3,}:?\\s*)+\\|?$");
     }
 
-    private static void flushParagraph(Context context, LinearLayout parent, List<String> paragraph, int textColor) {
+    private static void flushParagraph(Context context, LinearLayout parent, List<String> paragraph, int textColor,
+                                       LinkHandler linkHandler) {
         if (paragraph.isEmpty()) return;
         TextView p = text(context, String.join("\n", paragraph), 15, textColor);
-        p.setText(applyInline(p.getText().toString()));
+        p.setText(applyInline(p.getText().toString(), linkHandler));
         p.setMovementMethod(LinkMovementMethod.getInstance());
         p.setPadding(0, dp(context, 2), 0, dp(context, 6));
         parent.addView(p);
@@ -160,7 +179,8 @@ final class MarkdownRenderer {
         parent.addView(line, params);
     }
 
-    private static void addTable(Context context, LinearLayout parent, List<String> lines, int textColor, int mutedColor, int borderColor, Palette palette) {
+    private static void addTable(Context context, LinearLayout parent, List<String> lines, int textColor, int mutedColor, int borderColor,
+                                 Palette palette, LinkHandler linkHandler) {
         HorizontalScrollView scroll = new HorizontalScrollView(context);
         TableLayout table = new TableLayout(context);
         table.setShrinkAllColumns(false);
@@ -172,7 +192,8 @@ final class MarkdownRenderer {
             for (String cell : cells) {
                 String cellText = cell.trim();
                 TextView tv = text(context, "", 14, r == 0 ? textColor : mutedColor);
-                tv.setText(applyInline(cellText));
+                tv.setText(applyInline(cellText, linkHandler));
+                tv.setMovementMethod(LinkMovementMethod.getInstance());
                 tv.setTypeface(r == 0 ? Typeface.DEFAULT_BOLD : Typeface.DEFAULT);
                 tv.setPadding(dp(context, 10), dp(context, 8), dp(context, 10), dp(context, 8));
                 tv.setBackgroundColor(r == 0 ? palette.tableHeaderBackground : palette.tableCellBackground);
@@ -253,7 +274,11 @@ final class MarkdownRenderer {
         return tv;
     }
 
-    private static SpannableStringBuilder applyInline(String value) {
+    static SpannableStringBuilder applyInline(String value) {
+        return applyInline(value, null);
+    }
+
+    private static SpannableStringBuilder applyInline(String value, LinkHandler linkHandler) {
         SpannableStringBuilder out = new SpannableStringBuilder();
         int i = 0;
         while (i < value.length()) {
@@ -277,12 +302,108 @@ final class MarkdownRenderer {
                     continue;
                 }
             }
+            if (value.charAt(i) == '[') {
+                ParsedMarkdownLink link = parseMarkdownLink(value, i);
+                if (link != null) {
+                    appendMarkdownLink(out, link, linkHandler);
+                    i = link.end;
+                    continue;
+                }
+            }
+            int issueIdentifierEnd = IssueCommentRichText.issueIdentifierEndAt(value, i);
+            if (issueIdentifierEnd > i) {
+                appendIssueIdentifier(out, value.substring(i, issueIdentifierEnd), linkHandler);
+                i = issueIdentifierEnd;
+                continue;
+            }
             out.append(value.charAt(i));
             i++;
         }
         return out;
     }
 
+    private static void appendMarkdownLink(SpannableStringBuilder out, ParsedMarkdownLink link, LinkHandler linkHandler) {
+        MentionUri mention = MentionUri.parse(link.url);
+        if (mention != null) {
+            String label = linkHandler == null
+                    ? IssueCommentRichText.mentionDisplayLabel(mention.type, mention.id, link.label, new ArrayList<>(), new ArrayList<>(), null)
+                    : linkHandler.resolveMentionLabel(mention.type, mention.id, link.label);
+            appendLinkedText(out, label == null ? link.label : label, null);
+            return;
+        }
+        appendLinkedText(out, link.label, null);
+    }
+
+    private static void appendIssueIdentifier(SpannableStringBuilder out, String identifier, LinkHandler linkHandler) {
+        appendLinkedText(out, identifier, view -> {
+            if (linkHandler != null) linkHandler.openIssueIdentifier(identifier);
+        });
+    }
+
+    private static void appendLinkedText(SpannableStringBuilder out, String text, View.OnClickListener onClick) {
+        int start = out.length();
+        out.append(text == null ? "" : text);
+        int end = out.length();
+        if (end <= start) return;
+        out.setSpan(new ForegroundColorSpan(LINK_BLUE), start, end, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
+        out.setSpan(new UnderlineSpan(), start, end, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
+        if (onClick != null) {
+            out.setSpan(new ClickableSpan() {
+                @Override
+                public void onClick(View widget) {
+                    onClick.onClick(widget);
+                }
+
+                @Override
+                public void updateDrawState(TextPaint ds) {
+                    super.updateDrawState(ds);
+                    ds.setColor(LINK_BLUE);
+                    ds.setUnderlineText(true);
+                }
+            }, start, end, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
+        }
+    }
+
+    private static ParsedMarkdownLink parseMarkdownLink(String value, int start) {
+        int labelEnd = value.indexOf("](", start + 1);
+        if (labelEnd <= start + 1) return null;
+        int urlEnd = value.indexOf(')', labelEnd + 2);
+        if (urlEnd <= labelEnd + 2) return null;
+        String label = value.substring(start + 1, labelEnd);
+        String url = value.substring(labelEnd + 2, urlEnd);
+        return new ParsedMarkdownLink(label, url, urlEnd + 1);
+    }
+
+    private static final class ParsedMarkdownLink {
+        final String label;
+        final String url;
+        final int end;
+
+        ParsedMarkdownLink(String label, String url, int end) {
+            this.label = label;
+            this.url = url;
+            this.end = end;
+        }
+    }
+
+    private static final class MentionUri {
+        final String type;
+        final String id;
+
+        private MentionUri(String type, String id) {
+            this.type = type;
+            this.id = id;
+        }
+
+        static MentionUri parse(String url) {
+            if (url == null || !url.startsWith("mention://")) return null;
+            String path = url.substring("mention://".length());
+            int slash = path.indexOf('/');
+            if (slash <= 0 || slash >= path.length() - 1) return null;
+            return new MentionUri(path.substring(0, slash), path.substring(slash + 1));
+        }
+    }
+
     static int dp(Context context, int value) {
         return Math.round(value * context.getResources().getDisplayMetrics().density);
     }