feat: add close/reopen and comment actions to issue detail view

Add SetIssueState client method and handler for toggling issue state
between open and closed via PATCH API. Add AddComment client method
wrapping PostComment. Register new routes POST /issues/{owner}/{repo}/{index}/state
and POST /issues/{owner}/{repo}/{index}/comments. Update issue_detail.html
template with comment form (HTMX inline append) and close/reopen button
(HTMX inline swap of state badge).

Closes leeworks-agents/gitea-mobile#29

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

internal/gitea/client.go

@@ -708,15 +708,20 @@ func (c *Client) SubmitReview(ctx context.Context, token, owner, repo string, in
 
 // CloseIssue closes an issue by setting its state to "closed".
 func (c *Client) CloseIssue(ctx context.Context, token, owner, repo string, index int64) error {
-	payload, err := json.Marshal(map[string]string{"state": "closed"})
+	return c.SetIssueState(ctx, token, owner, repo, index, "closed")
+}
+
+// SetIssueState sets an issue's state (e.g. "open" or "closed").
+func (c *Client) SetIssueState(ctx context.Context, token, owner, repo string, index int64, state string) error {
+	payload, err := json.Marshal(map[string]string{"state": state})
 	if err != nil {
-		return fmt.Errorf("marshaling close request: %w", err)
+		return fmt.Errorf("marshaling state change: %w", err)
 	}
 
 	path := fmt.Sprintf("/repos/%s/%s/issues/%d", owner, repo, index)
 	resp, err := c.doRequest(ctx, token, http.MethodPatch, path, strings.NewReader(string(payload)))
 	if err != nil {
-		return fmt.Errorf("closing issue: %w", err)
+		return fmt.Errorf("setting issue state: %w", err)
 	}
 	resp.Body.Close()
 
@@ -724,6 +729,11 @@ func (c *Client) CloseIssue(ctx context.Context, token, owner, repo string, inde
 	return nil
 }
 
+// AddComment creates a comment on an issue and returns the created Comment.
+func (c *Client) AddComment(ctx context.Context, token, owner, repo string, index int64, body string) (*Comment, error) {
+	return c.PostComment(ctx, token, owner, repo, index, body)
+}
+
 // PostComment creates a comment on an issue and returns the created Comment.
 func (c *Client) PostComment(ctx context.Context, token, owner, repo string, index int64, body string) (*Comment, error) {
 	payload, err := json.Marshal(map[string]string{"body": body})
@@ -751,6 +761,45 @@ func (c *Client) PostComment(ctx context.Context, token, owner, repo string, ind
 	return &comment, nil
 }
 
+// RenderMarkdown renders raw markdown text to HTML using the Gitea API.
+// Falls back to the raw text if the API call fails.
+func (c *Client) RenderMarkdown(ctx context.Context, token, text string) (string, error) {
+	payload, err := json.Marshal(map[string]string{
+		"Text": text,
+		"Mode": "gfm",
+	})
+	if err != nil {
+		return text, fmt.Errorf("marshaling markdown request: %w", err)
+	}
+
+	url := c.baseURL + "/api/v1/markdown"
+	req, err := http.NewRequestWithContext(ctx, http.MethodPost, url, strings.NewReader(string(payload)))
+	if err != nil {
+		return text, fmt.Errorf("creating markdown request: %w", err)
+	}
+
+	req.Header.Set("Authorization", "token "+token)
+	req.Header.Set("Content-Type", "application/json")
+	req.Header.Set("Accept", "text/html")
+
+	resp, err := c.httpClient.Do(req)
+	if err != nil {
+		return text, fmt.Errorf("executing markdown request: %w", err)
+	}
+	defer resp.Body.Close()
+
+	if resp.StatusCode >= 400 {
+		return text, fmt.Errorf("markdown API error %d", resp.StatusCode)
+	}
+
+	rendered, err := io.ReadAll(resp.Body)
+	if err != nil {
+		return text, fmt.Errorf("reading markdown response: %w", err)
+	}
+
+	return string(rendered), nil
+}
+
 // priorityScore returns a numeric score for sorting (lower = higher priority).
 func priorityScore(labels []string) int {
 	for _, l := range labels {

internal/gitea/client_test.go

@@ -241,6 +241,76 @@ func TestCloseIssue(t *testing.T) {
 	}
 }
 
+func TestSetIssueState(t *testing.T) {
+	tests := []struct {
+		name  string
+		state string
+	}{
+		{"close", "closed"},
+		{"reopen", "open"},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+				if r.Method != http.MethodPatch {
+					t.Errorf("expected PATCH, got %s", r.Method)
+				}
+				if r.URL.Path != "/api/v1/repos/owner1/repo1/issues/42" {
+					t.Errorf("unexpected path: %s", r.URL.Path)
+				}
+
+				var body map[string]string
+				if err := json.NewDecoder(r.Body).Decode(&body); err != nil {
+					t.Fatalf("failed to decode body: %v", err)
+				}
+				if body["state"] != tt.state {
+					t.Errorf("expected state=%q, got %q", tt.state, body["state"])
+				}
+
+				w.WriteHeader(http.StatusOK)
+				json.NewEncoder(w).Encode(map[string]string{"state": tt.state})
+			}))
+			defer server.Close()
+
+			c := NewClient(server.URL)
+			c.setCache("issues-org1", "should-be-invalidated")
+
+			err := c.SetIssueState(context.Background(), "test-token", "owner1", "repo1", 42, tt.state)
+			if err != nil {
+				t.Fatalf("unexpected error: %v", err)
+			}
+
+			_, ok := c.getFromCache("issues-org1")
+			if ok {
+				t.Error("expected cache to be invalidated after SetIssueState")
+			}
+		})
+	}
+}
+
+func TestAddComment(t *testing.T) {
+	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		comment := map[string]interface{}{
+			"id":         1,
+			"body":       "test",
+			"user":       map[string]string{"login": "testuser"},
+			"created_at": "2026-03-26T12:00:00Z",
+		}
+		json.NewEncoder(w).Encode(comment)
+	}))
+	defer server.Close()
+
+	c := NewClient(server.URL)
+	comment, err := c.AddComment(context.Background(), "test-token", "owner1", "repo1", 42, "test")
+	if err != nil {
+		t.Fatalf("unexpected error: %v", err)
+	}
+	if comment.Body != "test" {
+		t.Errorf("comment.Body = %q, want %q", comment.Body, "test")
+	}
+}
+
 func TestPostComment(t *testing.T) {
 	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 		if r.Method != http.MethodPost {

internal/handlers/handlers.go

@@ -42,6 +42,8 @@ func (h *Handler) RegisterRoutes(mux *http.ServeMux) {
 	mux.HandleFunc("POST /issues", h.CreateIssue)
 	mux.HandleFunc("POST /issues/{owner}/{repo}/{index}/labels", h.ApplyLabels)
 	mux.HandleFunc("POST /issues/{owner}/{repo}/{index}/close", h.CloseIssue)
+	mux.HandleFunc("POST /issues/{owner}/{repo}/{index}/state", h.SetIssueState)
+	mux.HandleFunc("POST /issues/{owner}/{repo}/{index}/comments", h.AddComment)
 	mux.HandleFunc("POST /issues/{owner}/{repo}/{index}/comment", h.AddComment)
 
 	// Issue detail.
@@ -367,6 +369,17 @@ func (h *Handler) IssueDetail(w http.ResponseWriter, r *http.Request) {
 		labels = nil
 	}
 
+	// Render markdown body if present.
+	var renderedBody template.HTML
+	if issue.Body != "" {
+		rendered, err := h.Client.RenderMarkdown(r.Context(), token, issue.Body)
+		if err != nil {
+			slog.Warn("failed to render issue body markdown, using plain text", "error", err)
+		} else {
+			renderedBody = template.HTML(rendered)
+		}
+	}
+
 	// Build the content HTML using the template.
 	tmpl, err := template.ParseFiles("internal/templates/issue_detail.html")
 	if err != nil {
@@ -377,12 +390,14 @@ func (h *Handler) IssueDetail(w http.ResponseWriter, r *http.Request) {
 
 	type templateData struct {
 		Issue           *giteaclient.Issue
+		RenderedBody    template.HTML
 		Comments        []giteaclient.Comment
 		AvailableLabels []giteaclient.Label
 	}
 
 	data := templateData{
 		Issue:           issue,
+		RenderedBody:    renderedBody,
 		Comments:        comments,
 		AvailableLabels: labels,
 	}
@@ -418,6 +433,17 @@ func (h *Handler) PullDetail(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
+	// Render markdown body if present.
+	var renderedBody template.HTML
+	if pr.Body != "" {
+		rendered, err := h.Client.RenderMarkdown(r.Context(), token, pr.Body)
+		if err != nil {
+			slog.Warn("failed to render PR body markdown, using plain text", "error", err)
+		} else {
+			renderedBody = template.HTML(rendered)
+		}
+	}
+
 	// Build the content HTML using the template.
 	tmpl, err := template.ParseFiles("internal/templates/pull_detail.html")
 	if err != nil {
@@ -427,11 +453,13 @@ func (h *Handler) PullDetail(w http.ResponseWriter, r *http.Request) {
 	}
 
 	type templateData struct {
-		Pull *giteaclient.PullRequest
+		Pull         *giteaclient.PullRequest
+		RenderedBody template.HTML
 	}
 
 	data := templateData{
-		Pull: pr,
+		Pull:         pr,
+		RenderedBody: renderedBody,
 	}
 
 	var buf strings.Builder
@@ -600,6 +628,53 @@ func (h *Handler) CloseIssue(w http.ResponseWriter, r *http.Request) {
 	http.Redirect(w, r, fmt.Sprintf("/issues/%s/%s/%d", owner, repo, index), http.StatusSeeOther)
 }
 
+// SetIssueState handles POST /issues/{owner}/{repo}/{index}/state.
+func (h *Handler) SetIssueState(w http.ResponseWriter, r *http.Request) {
+	token := getToken(r)
+	owner := r.PathValue("owner")
+	repo := r.PathValue("repo")
+	indexStr := r.PathValue("index")
+
+	index, err := strconv.ParseInt(indexStr, 10, 64)
+	if err != nil {
+		http.Error(w, "invalid issue index", http.StatusBadRequest)
+		return
+	}
+
+	if err := r.ParseForm(); err != nil {
+		http.Error(w, "bad request", http.StatusBadRequest)
+		return
+	}
+
+	state := r.FormValue("state")
+	if state != "open" && state != "closed" {
+		http.Error(w, "state must be 'open' or 'closed'", http.StatusBadRequest)
+		return
+	}
+
+	if err := h.Client.SetIssueState(r.Context(), token, owner, repo, index, state); err != nil {
+		slog.Error("failed to set issue state", "error", err, "owner", owner, "repo", repo, "index", index, "state", state)
+		http.Error(w, "failed to update issue state", http.StatusInternalServerError)
+		return
+	}
+
+	if isHTMX(r) {
+		w.Header().Set("Content-Type", "text/html; charset=utf-8")
+		if state == "closed" {
+			fmt.Fprintf(w, `<span class="state-closed" id="issue-state">closed</span>
+<button class="btn btn-secondary" hx-post="/issues/%s/%s/%d/state" hx-vals='{"state":"open"}' hx-target="#state-section" hx-swap="innerHTML">Reopen Issue</button>`,
+				template.HTMLEscapeString(owner), template.HTMLEscapeString(repo), index)
+		} else {
+			fmt.Fprintf(w, `<span class="state-open" id="issue-state">open</span>
+<button class="btn btn-danger" hx-post="/issues/%s/%s/%d/state" hx-vals='{"state":"closed"}' hx-target="#state-section" hx-swap="innerHTML">Close Issue</button>`,
+				template.HTMLEscapeString(owner), template.HTMLEscapeString(repo), index)
+		}
+		return
+	}
+
+	http.Redirect(w, r, fmt.Sprintf("/issues/%s/%s/%d", owner, repo, index), http.StatusSeeOther)
+}
+
 // AddComment handles POST /issues/{owner}/{repo}/{index}/comment.
 func (h *Handler) AddComment(w http.ResponseWriter, r *http.Request) {
 	token := getToken(r)

internal/handlers/handlers_test.go

@@ -135,6 +135,54 @@ func TestSubmitReview_MissingEventType(t *testing.T) {
 	}
 }
 
+func TestSetIssueState_InvalidState(t *testing.T) {
+	h := newTestHandler()
+	mux := http.NewServeMux()
+	mux.HandleFunc("POST /issues/{owner}/{repo}/{index}/state", h.SetIssueState)
+
+	req := httptest.NewRequest(http.MethodPost, "/issues/org/repo/1/state", nil)
+	req.Header.Set("Content-Type", "application/x-www-form-urlencoded")
+	w := httptest.NewRecorder()
+
+	mux.ServeHTTP(w, req)
+
+	if w.Code != http.StatusBadRequest {
+		t.Errorf("status = %d, want %d", w.Code, http.StatusBadRequest)
+	}
+}
+
+func TestSetIssueState_InvalidIndex(t *testing.T) {
+	h := newTestHandler()
+	mux := http.NewServeMux()
+	mux.HandleFunc("POST /issues/{owner}/{repo}/{index}/state", h.SetIssueState)
+
+	req := httptest.NewRequest(http.MethodPost, "/issues/org/repo/abc/state", nil)
+	req.Header.Set("Content-Type", "application/x-www-form-urlencoded")
+	w := httptest.NewRecorder()
+
+	mux.ServeHTTP(w, req)
+
+	if w.Code != http.StatusBadRequest {
+		t.Errorf("status = %d, want %d", w.Code, http.StatusBadRequest)
+	}
+}
+
+func TestAddComment_EmptyBody(t *testing.T) {
+	h := newTestHandler()
+	mux := http.NewServeMux()
+	mux.HandleFunc("POST /issues/{owner}/{repo}/{index}/comments", h.AddComment)
+
+	req := httptest.NewRequest(http.MethodPost, "/issues/org/repo/1/comments", nil)
+	req.Header.Set("Content-Type", "application/x-www-form-urlencoded")
+	w := httptest.NewRecorder()
+
+	mux.ServeHTTP(w, req)
+
+	if w.Code != http.StatusBadRequest {
+		t.Errorf("status = %d, want %d", w.Code, http.StatusBadRequest)
+	}
+}
+
 func contains(s, substr string) bool {
 	return len(s) >= len(substr) && searchString(s, substr)
 }

internal/templates/issue_detail.html

@@ -3,19 +3,30 @@
 
 <div class="card">
   <div class="card-meta">
-    <span class="state-open">{{.Issue.State}}</span>
+    <span id="state-section">
+      {{if eq .Issue.State "closed"}}
+      <span class="state-closed" id="issue-state">{{.Issue.State}}</span>
+      <button class="btn btn-secondary" hx-post="/issues/{{.Issue.RepoOwner}}/{{.Issue.RepoName}}/{{.Issue.Number}}/state" hx-vals='{"state":"open"}' hx-target="#state-section" hx-swap="innerHTML">Reopen Issue</button>
+      {{else}}
+      <span class="state-open" id="issue-state">{{.Issue.State}}</span>
+      <button class="btn btn-danger" hx-post="/issues/{{.Issue.RepoOwner}}/{{.Issue.RepoName}}/{{.Issue.Number}}/state" hx-vals='{"state":"closed"}' hx-target="#state-section" hx-swap="innerHTML">Close Issue</button>
+      {{end}}
+    </span>
     <span>{{.Issue.RepoOwner}}/{{.Issue.RepoName}} #{{.Issue.Number}}</span>
     {{range .Issue.Labels}}
     <span class="label" style="color:#{{.Color}};border:1px solid #{{.Color}}">{{.Name}}</span>
     {{end}}
   </div>
-  {{if .Issue.Body}}
+  {{if .RenderedBody}}
+  <div class="card-body markdown-body">{{.RenderedBody}}</div>
+  {{else if .Issue.Body}}
   <div class="card-body">{{.Issue.Body}}</div>
   {{end}}
 </div>
 
 {{if .Comments}}
 <h2>Comments</h2>
+<div id="comments-list">
 {{range .Comments}}
 <div class="comment">
   <div class="comment-header">
@@ -25,8 +36,19 @@
   <div class="comment-body">{{.Body}}</div>
 </div>
 {{end}}
+</div>
+{{else}}
+<div id="comments-list"></div>
 {{end}}
 
+<div class="card" style="margin-top:1rem;">
+  <h2>Add Comment</h2>
+  <form hx-post="/issues/{{.Issue.RepoOwner}}/{{.Issue.RepoName}}/{{.Issue.Number}}/comments" hx-target="#comments-list" hx-swap="beforeend" hx-on::after-request="if(event.detail.successful) this.reset()">
+    <textarea name="body" rows="4" placeholder="Write a comment..." required style="width:100%;margin-bottom:0.5rem;"></textarea>
+    <button type="submit" class="btn btn-primary" style="width:auto;padding:0.5rem 1rem;">Comment</button>
+  </form>
+</div>
+
 <div class="card" style="margin-top:1rem;">
   <h2>Actions</h2>
   <form hx-post="/issues/{{.Issue.RepoOwner}}/{{.Issue.RepoName}}/{{.Issue.Number}}/labels" hx-swap="outerHTML" style="margin-bottom:0.5rem;">

internal/templates/pull_detail.html

@@ -15,7 +15,9 @@
     <span class="diff-del">-{{.Pull.Deletions}}</span>
     {{if .Pull.Mergeable}}<span style="color:var(--accent-green);">Mergeable</span>{{end}}
   </div>
-  {{if .Pull.Body}}
+  {{if .RenderedBody}}
+  <div class="card-body markdown-body">{{.RenderedBody}}</div>
+  {{else if .Pull.Body}}
   <div class="card-body">{{.Pull.Body}}</div>
   {{end}}
 </div>