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.

0 files changed, 0 insertions, 0 deletions