Implement /today and /edit-today

Implements #205

go.mod

@@ -1,6 +1,6 @@
 module github.com/bouncepaw/mycorrhiza
 
-go 1.19
+go 1.22
 
 require (
 	git.sr.ht/~bouncepaw/mycomarkup/v5 v5.5.0

help/en/today.myco

@@ -0,0 +1,4 @@
+= Today links
+Some people use Mycorrhiza to keep their diaries. They put each day's notes into separate hyphae, usually named in the ISO format, for example, `2024-06-01` for the 1st of June, 2024. This date format is especially handy because it aligns with the way Mycorrhiza sorts hyphae, so the days are in order.
+
+Links [[/today]] and [[/edit-today]] are special links that redirect to or edit the “today” hypha. Put them on your home hypha or on [[/help/en/top_bar | the top bar]].

help/view_help.html

@@ -33,6 +33,7 @@
 				<li><a href="/help/en/recent_changes">{{block "recent_changes" .}}Recent changes{{end}}</a></li>
 				<li><a href="/help/en/feeds">{{block "feeds" .}}Feeds{{end}}</a></li>
 				<li><a href="/help/en/orphans">{{block "orphans" .}}Orphaned hyphae{{end}}</a></li>
+				<li><a href="/help/en/today">Today links</a></li>
 			</ul>
 		</li>
 		<li>{{block "configuration" .}}Configuration (for administrators){{end}}

web/readers.go

@@ -14,6 +14,7 @@ import (
 	"os"
 	"path/filepath"
 	"strings"
+	"time"
 
 	"github.com/gorilla/mux"
 
@@ -35,6 +36,18 @@ func initReaders(r *mux.Router) {
 	r.PathPrefix("/rev/").HandlerFunc(handlerRevision)
 	r.PathPrefix("/rev-text/").HandlerFunc(handlerRevisionText)
 	r.PathPrefix("/media/").HandlerFunc(handlerMedia)
+	r.Path("/today").HandlerFunc(handlerToday)
+	r.Path("/edit-today").HandlerFunc(handlerEditToday)
+}
+
+func handlerEditToday(w http.ResponseWriter, rq *http.Request) {
+	today := time.Now().Format(time.DateOnly)
+	http.Redirect(w, rq, "/edit/"+today, http.StatusSeeOther)
+}
+
+func handlerToday(w http.ResponseWriter, rq *http.Request) {
+	today := time.Now().Format(time.DateOnly)
+	http.Redirect(w, rq, "/hypha/"+today, http.StatusSeeOther)
 }
 
 func handlerMedia(w http.ResponseWriter, rq *http.Request) {