refactor: clear six byte-compile warnings across four modules

- org-agenda-frame declared two of its own functions with declare-function.
- Same-file forward refs resolve at end of compile, so those were redundant.
- Worse, the declared empty arglist overrode safe-redo's real (&optional frame).
- That silently disabled arg-count checking on it; removed both declarations.
- music-config and video-audio-recording referenced three vars before their defvars.
- Added forward declarations so each compiles as a dynamic binding.
- dashboard declared el special, which made the section macro's own binding shadow it.
- Removed that declaration; el is the macro's lexical binding and resolves cleanly.
- Declared wttrin, the last undefined-function reference in the launcher table.

1 files changed, 9 insertions, 0 deletions

diff --git a/modules/music-config.el b/modules/music-config.el
index a7ec62c8..233bae72 100644
--- a/modules/music-config.el
+++ b/modules/music-config.el
@@ -374,6 +374,11 @@ point until it ends; the snap lands when the search exits."
 (defvar-local cj/music--renumber-timer nil
   "Pending idle timer for the playlist row renumber, or nil.")
 
+;; Forward declaration: the real `defvar-local' is a few defuns below, next to
+;; the highlight helper that owns it.  Declared special here so the setq in this
+;; function compiles as a dynamic binding, not a free-variable warning.
+(defvar cj/music--current-number-overlay)
+
 (defun cj/music--renumber-rows (&optional buffer)
   "Number every playlist row in BUFFER (default: current buffer) via overlays.
 Each non-blank line gets an \"NNN \" before-string so the cursor stays
@@ -789,6 +794,10 @@ ENTRIES.  Nil when neither applies (the caller falls back to a timestamp)."
                          (plist-get (cdr (assoc (emms-track-name tr) entries))
                                     :name)))))
 
+;; Forward declaration: the real `defvar' lives with the radio config block far
+;; below.  Declared special here so this reference compiles clean.
+(defvar cj/music-radio-save-dir)
+
 (defun cj/music--save-directory (tracks)
   "Directory a saved playlist targets.
 An all-stream queue is a radio playlist and saves into