refactor(profanity): extract _handle_suspend_signals; tighten comments

Main loop now calls a single helper for cont/suspend/Ctrl-Z
state instead of inlining the signal-handling block. Comment blocks in
profanity.c / editor.c / inputwin.c shortened to trailing form.

src/profanity.c

@@ -70,12 +70,38 @@ static void _connect_default(const char* const account);
 pthread_mutex_t lock;
 static gboolean force_quit = FALSE;
 
-// Signal-driven flags consumed by the main loop. SIGTSTP and a STOPPED editor
-// child → drop the process group to the shell (mutt-style). SIGCONT →
-// refresh curses on return.
 static volatile sig_atomic_t suspend_requested = FALSE;
 static volatile sig_atomic_t cont_requested = FALSE;
 
+static void
+_handle_suspend_signals(void)
+{
+    if (cont_requested) {
+        cont_requested = FALSE;
+        if (!editor_is_active()) {
+            clearok(stdscr, TRUE);
+            ui_resize();
+        }
+    }
+
+    if (editor_check_stopped()) {
+        log_info("[Editor] stopped; aborting back to profanity");
+        suspend_requested = FALSE;
+        editor_emergency_kill();
+    } else if (suspend_requested) {
+        suspend_requested = FALSE;
+        if (editor_is_active()) {
+            log_info("[Editor] SIGTSTP from vim group; deferring to next poll");
+        } else {
+            log_info("[Suspend] dropping to shell");
+            if (!isendwin()) {
+                endwin();
+            }
+            kill(0, SIGSTOP);
+        }
+    }
+}
+
 void
 prof_run(gchar* log_level, gchar* account_name, gchar* config_file, gchar* log_file, gchar* theme_name, gchar** commands)
 {
@@ -99,36 +125,7 @@ prof_run(gchar* log_level, gchar* account_name, gchar* config_file, gchar* log_f
     int waittime = 0;
     while (cont && !force_quit) {
         log_stderr_handler();
-
-        // Resume from fg after SIGSTOP. Vim handles its own refresh.
-        if (cont_requested) {
-            cont_requested = FALSE;
-            if (!editor_is_active()) {
-                clearok(stdscr, TRUE);
-                ui_resize();
-            }
-        }
-
-        // Editor STOPPED → abort. Plain Ctrl-Z → drop to shell. While editor
-        // is active, swallow suspend_requested (race: vim's kill(0,SIGTSTP)
-        // beats waitpid seeing STOPPED) — next poll catches it.
-        if (editor_check_stopped()) {
-            log_info("[Editor] stopped; aborting back to profanity");
-            suspend_requested = FALSE;
-            editor_emergency_kill();
-        } else if (suspend_requested) {
-            suspend_requested = FALSE;
-            if (editor_is_active()) {
-                log_info("[Editor] SIGTSTP from vim group; deferring to next poll");
-            } else {
-                log_info("[Suspend] dropping to shell");
-                if (!isendwin()) {
-                    endwin();
-                }
-                kill(0, SIGSTOP);
-            }
-        }
-
+        _handle_suspend_signals();
         session_check_autoaway();
 
         line = commands ? *commands : inp_readline();

src/tools/editor.c

@@ -32,9 +32,7 @@ typedef struct EditorContext
     void* user_data;
 } EditorContext;
 
-// Re-entrancy guard (lost in the async-editor rewrite). Prevents a plugin
-// from spawning a second editor that would fight the first for the terminal.
-static gboolean editor_active = FALSE;
+static gboolean editor_active = FALSE; // re-entrancy guard
 static pid_t editor_pid = 0;
 
 static void

src/ui/inputwin.c

@@ -320,9 +320,7 @@ inp_get_line(void)
     while (!line) {
         line = inp_readline();
         ui_update();
-        // Let the editor child watch dispatch — otherwise a prompt raised
-        // mid-editor-session deadlocks here.
-        while (g_main_context_iteration(NULL, FALSE))
+        while (g_main_context_iteration(NULL, FALSE)) // non-blocking; bounded by ready sources
             ;
     }
     status_bar_clear_prompt();
@@ -352,9 +350,7 @@ inp_get_password(void)
     while (!password) {
         password = inp_readline();
         ui_update();
-        // Let the editor child watch dispatch — otherwise a prompt raised
-        // mid-editor-session deadlocks here.
-        while (g_main_context_iteration(NULL, FALSE))
+        while (g_main_context_iteration(NULL, FALSE)) // non-blocking; bounded by ready sources
             ;
     }
     get_password = FALSE;