Put the header search box in the menu row, and stop saying "Search"

The header search was a band of its own under the menu; now it floats at
the right end of the menu row and only gets a thin bar when the header
has no menu. The forms are a single input — Enter and the phone
keyboard's search key submit a one-field form everywhere — with the
placeholder as the label, side boxes start without a heading, and the
results page shows a box only when no module does, so a page no longer
reads "Search" a dozen times.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Sd8UPWrvyYCLj97JexNw3A

1 files changed, 16 insertions, 0 deletions

diff --git a/internal/web/layout.go b/internal/web/layout.go
index 0d51068..6f5c84f 100644
--- a/internal/web/layout.go
+++ b/internal/web/layout.go
@@ -124,6 +124,9 @@ type Layout struct {
 	// A column is laid out when it has something to show — or always, when
 	// the theme keeps the columns' space.
 	HasLeft, HasRight bool
+	// A header search box sits in the menu row when there is one, so the two
+	// header modules need to know about each other.
+	HeaderMenu, HeaderSearch bool
 }
 
 // buildLayout groups modules by area, dropping areas the theme has switched off.
@@ -136,6 +139,8 @@ func buildLayout(t Theme, mods []store.Module) Layout {
 		switch m.Area {
 		case "header":
 			l.Header = append(l.Header, m)
+			l.HeaderMenu = l.HeaderMenu || m.Kind == "menu"
+			l.HeaderSearch = l.HeaderSearch || m.Kind == "search"
 		case "left":
 			l.Left = append(l.Left, m)
 		case "right":
@@ -181,6 +186,17 @@ func (l Layout) NeedsTags() bool {
 	return false
 }
 
+// HasSearch says whether a visible module offers a search box (the search
+// page shows its own only when none does).
+func (l Layout) HasSearch() bool {
+	for _, m := range l.all() {
+		if m.Kind == "search" {
+			return true
+		}
+	}
+	return false
+}
+
 // MaxRecent is the longest "recent posts" list any visible module wants (0 = none).
 func (l Layout) MaxRecent() int {
 	n := 0