refactor(ui): add material::LabeledInput helper + adopt at 8 form fields

UI-standardization audit: the labeled single-line form field (a plain
ImGui::Text label above a fixed-width InputText/InputTextWithHint) was
open-coded across dialogs. Add material::LabeledInput(label, id, buf, size,
width=-1, hint=nullptr, flags=0) mirroring that idiom exactly — pixel-identical,
but a single chokepoint so input styling (label typography, frame, spacing) can
later evolve in one place. Returns the input's edited bool.

Adopt at the clean vertical (label-above) single-line sites: address-book
add/edit (label + address), shield from-address, export-all-keys + export-
transactions filename, validate-address input, request-payment label + URI.
Left as-is: horizontal label-beside-input rows (settings RPC host/port/user/
pass use Text + SameLine), multiline (InputTextMultiline), numeric (InputDouble),
combos, and hint-only inputs — none match the vertical single-line idiom.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

src/ui/material/draw_helpers.h

@@ -354,6 +354,22 @@ inline ImVec2 DrawPill(ImDrawList* dl, const ImVec2& pos, const char* text, ImFo
     return sz;
 }
 
+// ── Labeled form input ───────────────────────────────────────────────────
+// The app's common form-field idiom: a plain label above a fixed-width single-line input
+// (ImGui::Text label + SetNextItemWidth + InputText / InputTextWithHint). Mirrors the existing
+// pattern exactly (no visual change) so input styling can later evolve in ONE place. `width` < 0
+// means full width (-1). Pass a non-null `hint` to use InputTextWithHint. Returns the input's
+// edited bool. The label is drawn via "%s" so a stray '%' in the text is safe.
+inline bool LabeledInput(const char* label, const char* id, char* buf, size_t bufSize,
+                         float width = -1.0f, const char* hint = nullptr,
+                         ImGuiInputTextFlags flags = 0)
+{
+    ImGui::Text("%s", label);
+    ImGui::SetNextItemWidth(width);
+    if (hint && hint[0]) return ImGui::InputTextWithHint(id, hint, buf, bufSize, flags);
+    return ImGui::InputText(id, buf, bufSize, flags);
+}
+
 // ── Frameless icon button ────────────────────────────────────────────────
 // Style for IconButton. All colors default to 0 (= unset): color falls back to OnSurfaceMedium();
 // hoverColor==0 means "no hover recolor"; hoverBg/restBg==0 mean "no background".

src/ui/windows/address_book_dialog.cpp

@@ -101,15 +101,13 @@ void AddressBookDialog::render(App* app)
 
         if (material::BeginOverlayDialog(title, open, dialogW, 0.94f,
                                          Layout::kDialogCompactBottomRatio(), id)) {
-            ImGui::Text("%s", TR("label"));
+            material::LabeledInput(TR("label"), isEdit ? "##EditLabel" : "##AddLabel",
-            ImGui::SetNextItemWidth(formW);
+                                   s_edit_label, sizeof(s_edit_label), formW);
-            ImGui::InputText(isEdit ? "##EditLabel" : "##AddLabel", s_edit_label, sizeof(s_edit_label));
 
             ImGui::Spacing();
 
-            ImGui::Text("%s", TR("address_label"));
+            material::LabeledInput(TR("address_label"), isEdit ? "##EditAddress" : "##AddAddress",
-            ImGui::SetNextItemWidth(formW);
+                                   s_edit_address, sizeof(s_edit_address), formW);
-            ImGui::InputText(isEdit ? "##EditAddress" : "##AddAddress", s_edit_address, sizeof(s_edit_address));
             if (!isEdit) {
                 ImGui::SameLine();
                 if (material::StyledButton(TR("paste"), ImVec2(0,0), S.resolveFont(actionBtn.font))) {

src/ui/windows/export_all_keys_dialog.cpp

@@ -99,9 +99,7 @@ void ExportAllKeysDialog::render(App* app)
         ImGui::Spacing();
         
         // Filename
-        ImGui::Text("%s", TR("output_filename"));
+        material::LabeledInput(TR("output_filename"), "##Filename", s_filename, sizeof(s_filename));
-        ImGui::SetNextItemWidth(-1);
-        ImGui::InputText("##Filename", s_filename, sizeof(s_filename));
         
         ImGui::Spacing();
         ImGui::TextDisabled("%s", TR("file_save_location"));

src/ui/windows/export_transactions_dialog.cpp

@@ -82,9 +82,7 @@ void ExportTransactionsDialog::render(App* app)
         ImGui::Spacing();
         
         // Filename
-        ImGui::Text("%s", TR("output_filename"));
+        material::LabeledInput(TR("output_filename"), "##Filename", s_filename, sizeof(s_filename));
-        ImGui::SetNextItemWidth(-1);
-        ImGui::InputText("##Filename", s_filename, sizeof(s_filename));
         
         ImGui::Spacing();
         ImGui::TextDisabled("%s", TR("file_save_location"));

src/ui/windows/request_payment_dialog.cpp

@@ -197,9 +197,7 @@ void RequestPaymentDialog::render(App* app)
         ImGui::Spacing();
 
         // Label (optional)
-        ImGui::Text("%s", TR("request_label"));
+        if (material::LabeledInput(TR("request_label"), "##Label", s_label, sizeof(s_label))) {
-        ImGui::SetNextItemWidth(-1);
-        if (ImGui::InputText("##Label", s_label, sizeof(s_label))) {
             s_uri_dirty = true;
         }
         
@@ -242,13 +240,11 @@ void RequestPaymentDialog::render(App* app)
 
         // Payment URI display
         if (!s_payment_uri.empty()) {
-            ImGui::Text("%s", TR("request_payment_uri"));
-            ImGui::SetNextItemWidth(-1);
-            
             // Use a selectable text area for the URI
             char uri_buf[1024];
             strncpy(uri_buf, s_payment_uri.c_str(), sizeof(uri_buf) - 1);
-            ImGui::InputText("##URI", uri_buf, sizeof(uri_buf), ImGuiInputTextFlags_ReadOnly);
+            material::LabeledInput(TR("request_payment_uri"), "##URI", uri_buf, sizeof(uri_buf),
+                                   -1.0f, nullptr, ImGuiInputTextFlags_ReadOnly);
             
             ImGui::Spacing();
             

src/ui/windows/shield_dialog.cpp

@@ -95,9 +95,7 @@ void ShieldDialog::render(App* app)
 
         // From address (for shield coinbase)
         if (s_mode == Mode::ShieldCoinbase) {
-            ImGui::Text("%s", TR("shield_from_address"));
+            material::LabeledInput(TR("shield_from_address"), "##FromAddr", s_from_address, sizeof(s_from_address));
-            ImGui::SetNextItemWidth(-1);
-            ImGui::InputText("##FromAddr", s_from_address, sizeof(s_from_address));
             ImGui::TextDisabled("%s", TR("shield_wildcard_hint"));
             ImGui::Spacing();
         }

src/ui/windows/validate_address_dialog.cpp

@@ -61,10 +61,9 @@ void ValidateAddressDialog::render(App* app)
         ImGui::Spacing();
 
         // Address input
-        ImGui::Text("%s", TR("address_label"));
+        bool enter_pressed = material::LabeledInput(TR("address_label"), "##ValidateAddr", s_address_input,
-        ImGui::SetNextItemWidth(-1);
+                                                    sizeof(s_address_input), -1.0f, nullptr,
-        bool enter_pressed = ImGui::InputText("##ValidateAddr", s_address_input, sizeof(s_address_input),
+                                                    ImGuiInputTextFlags_EnterReturnsTrue);
-                                              ImGuiInputTextFlags_EnterReturnsTrue);
         
         ImGui::Spacing();