docs: the manual and the user guide describe the badge bar, the dock and the slide-over pages

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

help/C/org.udpscope.app/signals.page

@@ -23,11 +23,15 @@
     <title>How to reach it</title>
     <steps>
       <item>
-        <p>Open the side panel (<key>s</key>), which lists every signal with a switch.</p>
+        <p>Click the <gui>+</gui> badge in the badge bar, or press <key>g</key>. The
+        <gui>Signals</gui> page lists what can be added — the signals the source declares that
+        are not acquired yet, each with a tick that acquires it. Past six acquired signals the
+        badges fold into one <gui>N signals</gui> badge, and the page then lists every signal.</p>
       </item>
       <item>
-        <p>The <gui>Signal list</gui> item in the overflow menu opens the editor where the
-        unit and the calibration live.</p>
+        <p>Once a signal is acquired its badge appears. Click it to open that signal's page: its
+        colour, <gui>Plot on</gui> buttons for the rows, and <gui>Information</gui> and
+        <gui>Calibrate</gui>, where the signal's details and its calibration live.</p>
       </item>
     </steps>
   </section>
@@ -38,7 +42,7 @@
       <item><p>Signals start disabled, and enabling one is what starts acquiring it. A trigger
       on a signal nobody acquires can never fire, so arming a trigger enables its signal for
       you.</p></item>
-      <item><p><gui>Calibrate</gui> in a signal's row menu opens the gain and offset it is
+      <item><p><gui>Calibrate</gui> on a signal's page opens the gain and offset it is
       <em>currently</em> drawn through, so a trace already scaled by a gain of 2 shows 2 —
       pressing <gui>Apply</gui> confirms it rather than resetting it. A signal nobody
       calibrated shows the identity, 1 and 0.</p></item>
@@ -51,12 +55,12 @@
       refuses to put it in a row rather than binding a trace that would read nothing for
       ever.</p></item>
       <item><p>A signal's colour follows the <em>signal</em>, not the slot, so the same signal
-      on two rows is one colour and the side panel's chip identifies it unambiguously. A
-      signal on no row gets a grey chip rather than none, so the panel's rows keep their
-      height.</p></item>
-      <item><p><em>Click a coloured chip to change that signal's colour.</em> A grey chip
-      names no trace, so it is not clickable. The colour is saved with the session;
-      <gui>Default colour</gui> in the signal's ⋯ menu gives the palette entry back.</p></item>
+      on two rows is one colour, and the dot on its badge shows it. A signal on no row gets a
+      grey dot rather than none.</p></item>
+      <item><p><em>Change a signal's colour</em> with <gui>Change colour</gui> on its page; a
+      signal on no row has no trace to colour, so the button is dimmed. The colour is saved
+      with the session; <gui>Default colour</gui> on the same page gives the palette entry
+      back.</p></item>
     </list>
   </section>