sl0ppty: clang-format the tree

The bumpy one. `make fmt` over every `.c` and `.h` outside `vendor/`: 32 files,
1,843 lines rewritten, no behaviour changed. Nothing here is worth reading -- the
next commit adds it to `.git-blame-ignore-revs` so `git blame` walks past it.

Two thirds of it is alignment the formatter now owns: trailing comments in a
struct, continuation lines under a signature. The rest is the hand-packed tables
opening up to one entry per line -- `ACTIONS`, `NAMED_KEYS`, `ACTION_HELP`. That
is a real loss of density and a real gain in diffs: adding an action was a reflow
of the block and is now one line. Anything worth keeping packed can be fenced with
`// clang-format off`; nothing was, on the grounds that a table is the thing a
formatter is for.

**One change is not formatting.** `src/config.h` had three trailing comments glued
onto one field:

    uint16_t hover_delay_ms; /* how long the pointer must rest to arm a guide */
    /* how long an announcement stays up */ /* rows per wheel notch */

-- `toast_ms`'s and `scroll_lines`' comments, landed on their neighbour by an
earlier edit, documenting the wrong things ever since. It is in this commit
because it is what caught it: clang-format could not settle on that line, wrapping
it one way and then re-indenting the wrap on a second pass, so `make fmt` was not
idempotent. The comments are back where they belong and it is.

Verified after the reformat, not before: `make clean && make all` is
warning-free, `make retest` is 1801 checks green, and `make fmt` twice in a row
changes nothing the second time. A formatter that alters behaviour would be worse
than none, so the gate was the whole suite rather than a reading of the diff.

1 files changed, 4 insertions, 2 deletions

diff --git a/src/graphics.c b/src/graphics.c
index 8ee0177..26391fd 100644
--- a/src/graphics.c
+++ b/src/graphics.c
@@ -102,7 +102,8 @@ void gfx_begin(graphics_t *g) {
    * of range for a char -- the compiler catches that one, but the same shape
    * with a digit that stays in range ("\x1b1") compiles and emits one wrong
    * byte. Escape then digit is always two strings. */
-  out_str(g, "\x1b" "7"); /* DECSC */
+  out_str(g, "\x1b"
+             "7"); /* DECSC */
 }
 
 static gfx_image_t *img_find(graphics_t *g, uint32_t pane, uint32_t src_id) {
@@ -259,7 +260,8 @@ char *gfx_flush(graphics_t *g, size_t *out_len) {
     g->len = 0;
     if (g->out) g->out[0] = 0;
   } else {
-    out_str(g, "\x1b" "8"); /* DECRC */
+    out_str(g, "\x1b"
+               "8"); /* DECRC */
   }
 
   *out_len = g->len;