Phase 2: gadcon provider with state-driven icon

Register an "iwd" gadcon client; each instance carries an elm_icon
that swaps freedesktop standard names based on Iwd_State.
Click toggles the (still stubbed) popup. Listener on iwd_manager
refreshes every active instance on state changes.

E 0.27 only ships the legacy gadcon API (no e_gadget header), so
this targets gadcon for compatibility.

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

data/e-module-iwd.edc

@@ -0,0 +1,36 @@
+/* Minimal theme for the iwd module gadget.
+ *
+ * Two groups are exported:
+ *   - "icon"            : used by the module loader / gadget chooser preview
+ *   - "e/modules/iwd/main" : the gadget itself, with a single swallow
+ *                            "e.swallow.content" the C code drops the icon in.
+ */
+
+collections {
+   group { name: "icon";
+      min: 24 24;
+      max: 256 256;
+      parts {
+         part { name: "icon"; type: SWALLOW;
+            description { state: "default" 0.0;
+               aspect: 1.0 1.0;
+               aspect_preference: BOTH;
+            }
+         }
+      }
+   }
+
+   group { name: "e/modules/iwd/main";
+      min: 4 4;
+      parts {
+         part { name: "e.swallow.content"; type: SWALLOW;
+            description { state: "default" 0.0;
+               rel1.relative: 0.0 0.0;
+               rel2.relative: 1.0 1.0;
+               aspect: 1.0 1.0;
+               aspect_preference: BOTH;
+            }
+         }
+      }
+   }
+}

data/meson.build

@@ -1,2 +1,11 @@
 install_data('module.desktop', install_dir : module_dir)
-# TODO: build and install e-module-iwd.edj theme
+
+edje_cc = find_program('edje_cc')
+
+iwd_theme = custom_target('e-module-iwd.edj',
+  input  : 'e-module-iwd.edc',
+  output : 'e-module-iwd.edj',
+  command : [edje_cc, '-id', meson.current_source_dir(), '@INPUT@', '@OUTPUT@'],
+  install : true,
+  install_dir : module_dir,
+)