Round out the editor: head widgets, undo, group/split-column, site settings

- Head widgets are now first-class in dashboard edit mode: they get
  drag/edit/delete handles, their own SortableJS group (so they can't
  cross into columns), and the layout endpoint accepts a
  headWidgets[] sequence alongside columns[].
- New POST /edit/api/restore swaps glance.yml ↔ glance.yml.bak —
  effectively undo (and click again to redo). Surfaced as a "Restore
  previous version" button on /edit.
- group and split-column are now editable inline via a new
  list-of-widgets schema type. Each item picks a widget type from a
  dropdown (excluding group/split-column to honor the backend's
  no-nesting rule) and renders that type's schema-driven sub-form.
  Switching the type re-renders the body.
- New /edit/site-settings page with a form for branding (app name,
  logo, favicon, footer, app icon/background). POST applies via the
  same surgical yaml.Node update used for widgets. Theme/server
  intentionally still YAML for now.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

internal/glance/admin-edit.go

@@ -601,11 +601,13 @@ func (a *application) handleAdminLayout(w http.ResponseWriter, r *http.Request)
 		return
 	}
 
+	type widgetRef struct {
+		Col int `json:"col"`
+		Idx int `json:"idx"`
+	}
 	var req struct {
-		Columns [][]struct {
-			Col int `json:"col"`
-			Idx int `json:"idx"`
-		} `json:"columns"`
+		HeadWidgets []widgetRef   `json:"headWidgets"`
+		Columns     [][]widgetRef `json:"columns"`
 	}
 	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
 		http.Error(w, err.Error(), http.StatusBadRequest)
@@ -632,6 +634,19 @@ func (a *application) handleAdminLayout(w http.ResponseWriter, r *http.Request)
 		return
 	}
 
+	// Snapshot head widgets (col = -1). Optional — pages may not have any.
+	var headWidgetsNode *yaml.Node
+	var headSnapshot []*yaml.Node
+	if hw, err := findOrCreateKey(pageNode, "head-widgets", false, yaml.SequenceNode); err == nil {
+		headWidgetsNode = hw
+		headSnapshot = make([]*yaml.Node, len(hw.Content))
+		copy(headSnapshot, hw.Content)
+	}
+	if len(req.HeadWidgets) != len(headSnapshot) {
+		http.Error(w, fmt.Sprintf("layout has %d head widgets, page has %d", len(req.HeadWidgets), len(headSnapshot)), http.StatusBadRequest)
+		return
+	}
+
 	// Snapshot the existing widget nodes by [col][idx] so we can splice them
 	// into the new layout without mutating during traversal.
 	snapshot := make([][]*yaml.Node, len(columns.Content))
@@ -648,25 +663,51 @@ func (a *application) handleAdminLayout(w http.ResponseWriter, r *http.Request)
 	}
 
 	// Validate: each widget referenced exactly once, all references in range.
-	seen := make(map[[2]int]bool, totalCount)
+	// Column widgets use col >= 0 keys; head widgets use col = -1.
+	seen := make(map[[2]int]bool, totalCount+len(headSnapshot))
+	checkRef := func(ref widgetRef) error {
+		if ref.Col == -1 {
+			if ref.Idx < 0 || ref.Idx >= len(headSnapshot) {
+				return fmt.Errorf("invalid head widget reference idx=%d", ref.Idx)
+			}
+		} else {
+			if ref.Col < 0 || ref.Col >= len(snapshot) || ref.Idx < 0 || ref.Idx >= len(snapshot[ref.Col]) {
+				return fmt.Errorf("invalid widget reference col=%d idx=%d", ref.Col, ref.Idx)
+			}
+		}
+		key := [2]int{ref.Col, ref.Idx}
+		if seen[key] {
+			return fmt.Errorf("widget col=%d idx=%d referenced more than once", ref.Col, ref.Idx)
+		}
+		seen[key] = true
+		return nil
+	}
+	for _, ref := range req.HeadWidgets {
+		if ref.Col != -1 {
+			http.Error(w, "head widgets must use col=-1", http.StatusBadRequest)
+			return
+		}
+		if err := checkRef(ref); err != nil {
+			http.Error(w, err.Error(), http.StatusBadRequest)
+			return
+		}
+	}
 	refCount := 0
 	for _, newCol := range req.Columns {
 		for _, ref := range newCol {
-			if ref.Col < 0 || ref.Col >= len(snapshot) || ref.Idx < 0 || ref.Idx >= len(snapshot[ref.Col]) {
-				http.Error(w, fmt.Sprintf("invalid widget reference col=%d idx=%d", ref.Col, ref.Idx), http.StatusBadRequest)
+			if ref.Col == -1 {
+				http.Error(w, "head widgets cannot move into columns", http.StatusBadRequest)
 				return
 			}
-			key := [2]int{ref.Col, ref.Idx}
-			if seen[key] {
-				http.Error(w, fmt.Sprintf("widget col=%d idx=%d referenced more than once", ref.Col, ref.Idx), http.StatusBadRequest)
+			if err := checkRef(ref); err != nil {
+				http.Error(w, err.Error(), http.StatusBadRequest)
 				return
 			}
-			seen[key] = true
 			refCount++
 		}
 	}
 	if refCount != totalCount {
-		http.Error(w, fmt.Sprintf("layout references %d widgets but page has %d", refCount, totalCount), http.StatusBadRequest)
+		http.Error(w, fmt.Sprintf("layout references %d column widgets but page has %d", refCount, totalCount), http.StatusBadRequest)
 		return
 	}
 
@@ -679,6 +720,14 @@ func (a *application) handleAdminLayout(w http.ResponseWriter, r *http.Request)
 		}
 		widgets.Content = newContent
 	}
+	// And rebuild head widgets sequence.
+	if headWidgetsNode != nil {
+		newHead := make([]*yaml.Node, 0, len(req.HeadWidgets))
+		for _, ref := range req.HeadWidgets {
+			newHead = append(newHead, headSnapshot[ref.Idx])
+		}
+		headWidgetsNode.Content = newHead
+	}
 
 	if err := editor.save(); err != nil {
 		http.Error(w, err.Error(), http.StatusInternalServerError)
@@ -966,6 +1015,117 @@ func (a *application) handleAdminWidgetSchemas(w http.ResponseWriter, r *http.Re
 	}
 }
 
+// ---------- site settings (branding) ----------
+
+var brandingFieldKeys = []string{
+	"hide-footer",
+	"custom-footer",
+	"logo-text",
+	"logo-url",
+	"favicon-url",
+	"app-name",
+	"app-icon-url",
+	"app-background-color",
+}
+
+func (a *application) handleAdminUpdateSiteSettings(w http.ResponseWriter, r *http.Request) {
+	if !a.adminAccessAllowed(w, r) {
+		return
+	}
+	if err := r.ParseForm(); err != nil {
+		http.Error(w, err.Error(), http.StatusBadRequest)
+		return
+	}
+
+	editor, err := loadConfigEditor(a.ConfigPath)
+	if err != nil {
+		adminError(w, http.StatusInternalServerError, err.Error())
+		return
+	}
+	branding, err := findOrCreateKey(editor.topMapping(), "branding", true, yaml.MappingNode)
+	if err != nil {
+		adminError(w, http.StatusInternalServerError, err.Error())
+		return
+	}
+
+	fields := make(map[string]interface{})
+	for _, key := range brandingFieldKeys {
+		if !r.Form.Has(key) {
+			continue
+		}
+		raw := strings.TrimSpace(r.FormValue(key))
+		if key == "hide-footer" {
+			fields[key] = raw == "on" || raw == "true" || raw == "1"
+			continue
+		}
+		if raw == "" {
+			fields[key] = nil
+		} else {
+			fields[key] = raw
+		}
+	}
+	// Force unchecked checkboxes to false (browsers omit them).
+	if _, ok := fields["hide-footer"]; !ok {
+		fields["hide-footer"] = false
+	}
+
+	if err := applyFieldsToWidget(branding, fields); err != nil {
+		adminError(w, http.StatusBadRequest, err.Error())
+		return
+	}
+	if err := editor.save(); err != nil {
+		adminError(w, http.StatusBadRequest, err.Error())
+		return
+	}
+	http.Redirect(w, r, a.Config.Server.BaseURL+"/edit/site-settings", http.StatusSeeOther)
+}
+
+// ---------- restore from .bak ----------
+
+// handleAdminRestore swaps the contents of glance.yml and glance.yml.bak.
+// Each save writes a .bak of the previous version, so this is effectively an
+// undo. Calling it again redoes since we put the just-current contents into
+// the new .bak.
+func (a *application) handleAdminRestore(w http.ResponseWriter, r *http.Request) {
+	if !a.adminAccessAllowed(w, r) {
+		return
+	}
+	bakPath := a.ConfigPath + ".bak"
+	bakContent, err := os.ReadFile(bakPath)
+	if err != nil {
+		adminError(w, http.StatusBadRequest, "no backup to restore: "+err.Error())
+		return
+	}
+	if _, err := newConfigFromYAML(bakContent); err != nil {
+		adminError(w, http.StatusBadRequest, "backup is invalid: "+err.Error())
+		return
+	}
+
+	currentContent, err := os.ReadFile(a.ConfigPath)
+	if err != nil {
+		adminError(w, http.StatusInternalServerError, err.Error())
+		return
+	}
+	// Move current → .bak (so user can re-restore).
+	if err := os.WriteFile(bakPath, currentContent, 0644); err != nil {
+		adminError(w, http.StatusInternalServerError, "writing new backup: "+err.Error())
+		return
+	}
+	// Atomic write of .bak content into main file.
+	tmpPath := a.ConfigPath + ".tmp"
+	if err := os.WriteFile(tmpPath, bakContent, 0644); err != nil {
+		adminError(w, http.StatusInternalServerError, "writing temp file: "+err.Error())
+		return
+	}
+	if err := os.Rename(tmpPath, a.ConfigPath); err != nil {
+		os.Remove(tmpPath)
+		adminError(w, http.StatusInternalServerError, "renaming temp file: "+err.Error())
+		return
+	}
+
+	http.Redirect(w, r, a.Config.Server.BaseURL+"/edit", http.StatusSeeOther)
+}
+
 // ---------- page settings + reorder ----------
 
 // pageMetadataKeys is the set of page-level keys the settings form handles.

internal/glance/admin-schemas.go

@@ -236,7 +236,15 @@ var widgetSchemas = map[string][]widgetFieldSchema{
 		{Key: "frameless", Label: "Hide widget frame", Type: "boolean"},
 	},
 
-	// group + split-column intentionally skipped: their `widgets:` field is a
-	// recursive list of widget objects, which the inline form generator can't
-	// render usefully yet. They fall through to the YAML editor.
+	"group": {
+		{Key: "title", Label: "Custom title", Type: "string"},
+		{Key: "widgets", Label: "Widgets in group", Type: "list-of-widgets", Required: true,
+			Help: "Each tab inside the group. Nested groups and split-columns aren't allowed."},
+	},
+
+	"split-column": {
+		{Key: "title", Label: "Custom title", Type: "string"},
+		{Key: "max-columns", Label: "Maximum columns (≥2)", Type: "number"},
+		{Key: "widgets", Label: "Widgets shown in the split", Type: "list-of-widgets", Required: true},
+	},
 }

internal/glance/admin.go

@@ -14,6 +14,7 @@ var (
 	adminPageTemplate         = mustParseTemplate("admin-page.html", "document.html", "footer.html")
 	adminWidgetTemplate       = mustParseTemplate("admin-widget.html", "document.html", "footer.html")
 	adminPageSettingsTemplate = mustParseTemplate("admin-page-settings.html", "document.html", "footer.html")
+	adminSiteSettingsTemplate = mustParseTemplate("admin-site-settings.html", "document.html", "footer.html")
 )
 
 // allWidgetTypes mirrors the switch in newWidget(). Aliases ("stocks") omitted.
@@ -249,6 +250,19 @@ type adminTemplateData struct {
 	PageSettings *adminPageSettings
 	IsFirstPage  bool
 	IsLastPage   bool
+
+	SiteSettings *adminSiteSettings
+}
+
+type adminSiteSettings struct {
+	AppName            string
+	LogoText           string
+	LogoURL            string
+	FaviconURL         string
+	AppIconURL         string
+	AppBackgroundColor string
+	HideFooter         bool
+	CustomFooter       string
 }
 
 func (a *application) handleAdminIndex(w http.ResponseWriter, r *http.Request) {
@@ -383,6 +397,26 @@ func (a *application) handleAdminWidget(w http.ResponseWriter, r *http.Request)
 	})
 }
 
+func (a *application) handleAdminSiteSettings(w http.ResponseWriter, r *http.Request) {
+	if !a.adminAccessAllowed(w, r) {
+		return
+	}
+	b := a.Config.Branding
+	settings := &adminSiteSettings{
+		AppName:            b.AppName,
+		LogoText:           b.LogoText,
+		LogoURL:            b.LogoURL,
+		FaviconURL:         b.FaviconURL,
+		AppIconURL:         b.AppIconURL,
+		AppBackgroundColor: b.AppBackgroundColor,
+		HideFooter:         b.HideFooter,
+		CustomFooter:       string(b.CustomFooter),
+	}
+	data := adminTemplateData{App: a, SiteSettings: settings}
+	a.populateTemplateRequestData(&data.Request, r)
+	renderAdminTemplate(w, adminSiteSettingsTemplate, data)
+}
+
 func (a *application) handleAdminPageSettings(w http.ResponseWriter, r *http.Request) {
 	if !a.adminAccessAllowed(w, r) {
 		return

internal/glance/glance.go

@@ -455,6 +455,7 @@ func (a *application) server() (func() error, func() error) {
 	mux.HandleFunc("GET /edit", a.handleAdminIndex)
 	mux.HandleFunc("GET /edit/pages/{page}", a.handleAdminPage)
 	mux.HandleFunc("GET /edit/pages/{page}/settings", a.handleAdminPageSettings)
+	mux.HandleFunc("GET /edit/site-settings", a.handleAdminSiteSettings)
 	mux.HandleFunc("GET /edit/pages/{page}/widgets/{col}/{idx}", a.handleAdminWidget)
 
 	mux.HandleFunc("POST /edit/api/pages", a.handleAdminAddPage)
@@ -477,6 +478,8 @@ func (a *application) server() (func() error, func() error) {
 	mux.HandleFunc("POST /edit/api/pages/{page}/columns/{col}/size", a.handleAdminColumnSize)
 	mux.HandleFunc("POST /edit/api/pages/{page}/fields", a.handleAdminUpdatePageFields)
 	mux.HandleFunc("POST /edit/api/pages/{page}/move", a.handleAdminMovePage)
+	mux.HandleFunc("POST /edit/api/restore", a.handleAdminRestore)
+	mux.HandleFunc("POST /edit/api/site-settings", a.handleAdminUpdateSiteSettings)
 
 	if a.RequiresAuth {
 		mux.HandleFunc("GET /login", a.handleLoginPageRequest)

internal/glance/static/css/edit-mode.css

@@ -557,3 +557,34 @@ textarea.edit-input {
     border-color: var(--color-primary);
     color: var(--color-primary);
 }
+
+/* ---------- Nested widget editor (group / split-column) ---------- */
+
+.edit-nested-widget {
+    border: 1px solid var(--color-widget-content-border);
+    border-radius: 4px;
+    padding: 0.6rem;
+    background: rgba(0, 0, 0, 0.1);
+}
+
+.edit-nested-header {
+    display: flex;
+    gap: 0.5rem;
+    align-items: center;
+    margin-bottom: 0.6rem;
+}
+
+.edit-nested-type {
+    background: var(--color-widget-background);
+    border: 1px solid var(--color-widget-content-border);
+    border-radius: 3px;
+    color: var(--color-text-base);
+    font: inherit;
+    font-size: var(--font-size-h5);
+    padding: 0.2rem 0.4rem;
+    flex: 1;
+}
+
+.edit-nested-body > .edit-field:last-child {
+    margin-bottom: 0;
+}

internal/glance/static/js/edit-mode.js

@@ -45,6 +45,10 @@ function widgetTypeOf(widget) {
 /* ---------- Layout (drag-drop) ---------- */
 
 function indexWidgets() {
+    document.querySelectorAll(".head-widgets > .widget").forEach((w, idx) => {
+        w.dataset.origCol = "-1";
+        w.dataset.origIdx = String(idx);
+    });
     document.querySelectorAll(".page-column").forEach((col, colIdx) => {
         col.dataset.colIdx = String(colIdx);
         col.querySelectorAll(":scope > .widget").forEach((w, idx) => {
@@ -55,16 +59,18 @@ function indexWidgets() {
 }
 
 function addHandles() {
-    document.querySelectorAll(".page-column > .widget").forEach((w) => {
-        if (w.querySelector(":scope > .edit-mode-handles")) return;
-        const handles = document.createElement("div");
-        handles.className = "edit-mode-handles";
-        handles.innerHTML =
-            '<button type="button" class="edit-handle edit-handle-drag" title="Drag to reorder" aria-label="Drag">⋮⋮</button>' +
-            '<button type="button" class="edit-handle edit-handle-edit" title="Edit" aria-label="Edit">✎</button>' +
-            '<button type="button" class="edit-handle edit-handle-delete" title="Delete" aria-label="Delete">✕</button>';
-        w.appendChild(handles);
-    });
+    document
+        .querySelectorAll(".page-column > .widget, .head-widgets > .widget")
+        .forEach((w) => {
+            if (w.querySelector(":scope > .edit-mode-handles")) return;
+            const handles = document.createElement("div");
+            handles.className = "edit-mode-handles";
+            handles.innerHTML =
+                '<button type="button" class="edit-handle edit-handle-drag" title="Drag to reorder" aria-label="Drag">⋮⋮</button>' +
+                '<button type="button" class="edit-handle edit-handle-edit" title="Edit" aria-label="Edit">✎</button>' +
+                '<button type="button" class="edit-handle edit-handle-delete" title="Delete" aria-label="Delete">✕</button>';
+            w.appendChild(handles);
+        });
 }
 
 function removeHandles() {
@@ -184,6 +190,15 @@ function setStatus(text, kind) {
 
 async function saveLayout() {
     const { slug } = pageInfo();
+    const headWidgets = [];
+    document
+        .querySelectorAll(".head-widgets > .widget")
+        .forEach((w) =>
+            headWidgets.push({
+                col: parseInt(w.dataset.origCol, 10),
+                idx: parseInt(w.dataset.origIdx, 10),
+            }),
+        );
     const columns = [];
     document.querySelectorAll(".page-column").forEach((col) => {
         const refs = [];
@@ -201,7 +216,7 @@ async function saveLayout() {
         const r = await fetch(api(`/edit/api/pages/${encodeURIComponent(slug)}/layout`), {
             method: "POST",
             headers: { "Content-Type": "application/json" },
-            body: JSON.stringify({ columns }),
+            body: JSON.stringify({ headWidgets, columns }),
         });
         if (!r.ok) {
             setStatus("Save failed: " + (await r.text()), "error");
@@ -312,11 +327,52 @@ function renderField(field, value) {
             return wrap(renderListStrings(value));
         case "list-objects":
             return wrap(renderListObjects(field.items, value));
+        case "list-of-widgets":
+            return wrap(renderListOfWidgets(value));
         default:
             return wrap(`<em>Unsupported type: ${escapeHTML(field.type)}</em>`);
     }
 }
 
+// Widget types allowed inside a group/split-column. Nested groups and
+// split-columns are rejected by the backend, so we hide them in the picker.
+function nestedWidgetTypes() {
+    const all = Object.keys(state.schemas || {});
+    return all
+        .filter((t) => t !== "group" && t !== "split-column")
+        .sort();
+}
+
+function renderListOfWidgets(values) {
+    values = Array.isArray(values) ? values : [];
+    const items = values
+        .map((v) => renderNestedWidget(v?.type || "clock", v || {}))
+        .join("");
+    return `
+        <div class="edit-list edit-list-widgets">
+            <div class="edit-list-items">${items}</div>
+            <button type="button" class="edit-list-add" data-add-widget="1">+ Add widget</button>
+        </div>`;
+}
+
+function renderNestedWidget(widgetType, values) {
+    const schema = state.schemas?.[widgetType] || [];
+    const typeOptions = nestedWidgetTypes()
+        .map(
+            (t) =>
+                `<option value="${escapeHTML(t)}" ${t === widgetType ? "selected" : ""}>${escapeHTML(t)}</option>`,
+        )
+        .join("");
+    return `
+        <div class="edit-list-item edit-nested-widget" data-type="${escapeHTML(widgetType)}">
+            <div class="edit-nested-header">
+                <select class="edit-nested-type" title="Widget type">${typeOptions}</select>
+                <button type="button" class="edit-list-remove">Remove</button>
+            </div>
+            <div class="edit-nested-body">${renderForm(schema, values)}</div>
+        </div>`;
+}
+
 function renderListStrings(values) {
     values = Array.isArray(values) ? values : [];
     const items = values
@@ -416,6 +472,26 @@ function collectFieldValue(fieldEl, field) {
             );
             return filtered.length ? filtered : null;
         }
+        case "list-of-widgets": {
+            const items = fieldEl.querySelectorAll(
+                ":scope > .edit-list > .edit-list-items > .edit-nested-widget",
+            );
+            const arr = [...items].map((item) => {
+                const type = item.dataset.type;
+                const body = item.querySelector(":scope > .edit-nested-body");
+                const schema = state.schemas?.[type] || [];
+                const values = collectValues(body, schema);
+                // Drop null/empty fields; emit type plus whatever was filled in.
+                const out = { type };
+                for (const [k, v] of Object.entries(values)) {
+                    if (v !== null && !(Array.isArray(v) && v.length === 0)) {
+                        out[k] = v;
+                    }
+                }
+                return out;
+            });
+            return arr.length ? arr : null;
+        }
     }
     return null;
 }
@@ -682,10 +758,31 @@ function openDialog({ title, schema, values, submitLabel, onSubmit }) {
                 tmp.innerHTML = renderListObjectItem(itemsSchema, {});
                 items.appendChild(tmp.firstElementChild);
                 items.lastElementChild.querySelector("input, textarea, select")?.focus();
+            } else if (list.classList.contains("edit-list-widgets")) {
+                const defaultType = nestedWidgetTypes()[0] || "clock";
+                const tmp = document.createElement("div");
+                tmp.innerHTML = renderNestedWidget(defaultType, {});
+                items.appendChild(tmp.firstElementChild);
+                items.lastElementChild
+                    .querySelector(".edit-nested-body input, .edit-nested-body textarea, .edit-nested-body select")
+                    ?.focus();
             }
         }
     });
 
+    // Type-switching for nested widgets: re-render the item's body with the
+    // schema for the newly chosen type.
+    overlay.addEventListener("change", (e) => {
+        const sel = e.target.closest(".edit-nested-type");
+        if (!sel) return;
+        const item = sel.closest(".edit-nested-widget");
+        const newType = sel.value;
+        item.dataset.type = newType;
+        const body = item.querySelector(":scope > .edit-nested-body");
+        const schema = state.schemas?.[newType] || [];
+        body.innerHTML = renderForm(schema, {});
+    });
+
     overlay.addEventListener("keydown", (e) => {
         if (e.key === "Escape") close();
     });
@@ -877,6 +974,21 @@ function enterEditMode() {
             }),
         );
     });
+    // Head widgets get their own group so they can't be dragged into columns
+    // (they live in a separate yaml sequence and render differently).
+    document.querySelectorAll(".head-widgets").forEach((hw) => {
+        state.sortables.push(
+            Sortable.create(hw, {
+                group: "glance-head-widgets",
+                handle: ".edit-handle-drag",
+                draggable: ".widget",
+                animation: 150,
+                ghostClass: "sortable-ghost",
+                dragClass: "sortable-drag",
+                onEnd: () => saveLayout(),
+            }),
+        );
+    });
 
     localStorage.setItem(STORAGE_KEY, "1");
     // Pre-warm schema cache so first dialog open is instant.

internal/glance/templates/admin-site-settings.html

@@ -0,0 +1,72 @@
+{{- template "document.html" . }}
+
+{{- define "document-title" }}Site settings - {{ .App.Config.Branding.AppName }}{{ end }}
+
+{{- define "document-body" }}
+<div class="flex flex-column body-content">
+    <main class="content-bounds" style="padding-block: 2rem;">
+        <div class="margin-bottom-15">
+            <a class="color-subdue" href="{{ .App.Config.Server.BaseURL }}/edit">← Edit</a>
+        </div>
+        <h1 class="size-h1 margin-bottom-15">Site settings</h1>
+        <p class="color-subdue margin-bottom-25">
+            Branding shown in the header and footer. Theme colors, server settings,
+            and authentication still need YAML — edit <code>{{ .App.ConfigPath }}</code>
+            directly for those.
+        </p>
+
+        <form method="post" action="{{ .App.Config.Server.BaseURL }}/edit/api/site-settings"
+              style="display:flex;flex-direction:column;gap:1rem;max-width:36rem;">
+
+            <label class="form-label widget-header">
+                App name
+                <input type="text" name="app-name" class="input" value="{{ .SiteSettings.AppName }}" placeholder="Glance">
+            </label>
+
+            <label class="form-label widget-header">
+                Logo text (header)
+                <input type="text" name="logo-text" class="input" value="{{ .SiteSettings.LogoText }}">
+                <small class="color-subdue size-h5">Shown if no logo URL is set.</small>
+            </label>
+
+            <label class="form-label widget-header">
+                Logo URL
+                <input type="text" name="logo-url" class="input" value="{{ .SiteSettings.LogoURL }}" placeholder="/assets/logo.svg">
+            </label>
+
+            <label class="form-label widget-header">
+                Favicon URL
+                <input type="text" name="favicon-url" class="input" value="{{ .SiteSettings.FaviconURL }}">
+                <small class="color-subdue size-h5">Defaults to the bundled glance favicon.</small>
+            </label>
+
+            <label class="form-label widget-header">
+                App icon URL (PWA)
+                <input type="text" name="app-icon-url" class="input" value="{{ .SiteSettings.AppIconURL }}">
+            </label>
+
+            <label class="form-label widget-header">
+                App background color (PWA)
+                <input type="text" name="app-background-color" class="input" value="{{ .SiteSettings.AppBackgroundColor }}" placeholder="#000000">
+            </label>
+
+            <label class="form-label widget-header" style="display:flex;flex-direction:row;align-items:center;gap:0.5rem;">
+                <input type="checkbox" name="hide-footer" {{ if .SiteSettings.HideFooter }}checked{{ end }}>
+                <span>Hide footer</span>
+            </label>
+
+            <label class="form-label widget-header">
+                Custom footer (HTML)
+                <textarea name="custom-footer" class="input" rows="4">{{ .SiteSettings.CustomFooter }}</textarea>
+                <small class="color-subdue size-h5">Replaces the default Glance footer if set.</small>
+            </label>
+
+            <div class="flex gap-10 margin-top-10">
+                <button type="submit">Save</button>
+                <a class="color-subdue" style="align-self:center;" href="{{ .App.Config.Server.BaseURL }}/edit">Cancel</a>
+            </div>
+        </form>
+    </main>
+    {{ template "footer.html" . }}
+</div>
+{{- end }}

internal/glance/templates/admin.html

@@ -5,7 +5,12 @@
 {{- define "document-body" }}
 <div class="flex flex-column body-content">
     <main class="content-bounds" style="padding-block: 2rem;">
-        <h1 class="size-h1 margin-bottom-15">Edit</h1>
+        <div class="flex items-center gap-10">
+            <h1 class="size-h1 grow">Edit</h1>
+            <a href="{{ .App.Config.Server.BaseURL }}/edit/site-settings">
+                <button type="button">Site settings</button>
+            </a>
+        </div>
         <p class="color-subdue margin-bottom-25">
             Editing <code>{{ .App.ConfigPath }}</code>. Changes take effect via hot-reload.
         </p>
@@ -43,6 +48,17 @@
             <input type="text" name="title" required placeholder="Page title" class="input grow">
             <button type="submit">Add page</button>
         </form>
+
+        <hr style="margin-block: 2rem; border: none; border-top: 1px solid var(--color-widget-content-border);">
+        <h3 class="size-h3 margin-bottom-10">Undo last save</h3>
+        <p class="color-subdue margin-bottom-10">
+            Restores the previous contents of <code>{{ .App.ConfigPath }}</code> from the
+            <code>.bak</code> file written on each save. Click again to redo.
+        </p>
+        <form method="post" action="{{ .App.Config.Server.BaseURL }}/edit/api/restore"
+              onsubmit="return confirm('Restore the previous version of your config?');">
+            <button type="submit">Restore previous version</button>
+        </form>
     </main>
     {{ template "footer.html" . }}
 </div>