feat: Complete modeline overhaul with custom segments and interactive features

Replaced mood-line with a custom, minimal modeline using only built-in
Emacs functionality to avoid native compilation issues.

**Architecture:**
- Named segment system using defvar-local for easy reordering
- Emacs 30 built-in right-alignment (mode-line-format-right-align)
- All segments marked as risky-local-variable for proper evaluation

**Features:**
- Color-coded buffer names (green=writeable, red=read-only, gold=overwrite)
- VC branch with git symbol (U+E0A0) and state-based coloring
- Position format: L:line C:col
- Help-echo tooltips on all segments
- Mouse click handlers for interactive actions
- String truncation in narrow windows (< 100 chars)
- Active-window-only display for branch and misc-info

**Interactive Actions:**
- Buffer name: mouse-1 = prev-buffer, mouse-3 = next-buffer
- Major mode: mouse-1 = describe-mode
- Git branch: mouse-1 = vc-diff, mouse-3 = vc-root-diff

**Bug Fixes:**
- Disabled async native compilation to prevent "Selecting deleted buffer" errors
- Fixed difftastic loading by changing :demand to :defer
- Abstracted buffer status colors to user-constants.el for reuse

Inspired by Prot's modeline design patterns.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

1 files changed, 3 insertions, 6 deletions

diff --git a/modules/ui-config.el b/modules/ui-config.el
index 91dbaf31..837d2169 100644
--- a/modules/ui-config.el
+++ b/modules/ui-config.el
@@ -36,11 +36,8 @@
   "Opacity level for Emacs frames when `cj/enable-transparency' is non-nil.
 100 = fully opaque, 0 = fully transparent.")
 
-(defconst cj/cursor-colors
-  '((read-only . "#f06a3f")  ; red   – buffer is read-only
-	(overwrite . "#c48702")  ; gold  – overwrite mode
-	(normal    . "#64aa0f")) ; green – insert & read/write
-  "Alist mapping cursor states to their colors.")
+;; Use buffer status colors from user-constants
+(require 'user-constants)
 
 ;; ----------------------------- System UI Settings ----------------------------
 
@@ -104,7 +101,7 @@ When `cj/enable-transparency' is nil, reset alpha to fully opaque."
 				 (buffer-read-only 'read-only)
 				 (overwrite-mode   'overwrite)
 				 (t                'normal)))
-		 (color (alist-get state cj/cursor-colors)))
+		 (color (alist-get state cj/buffer-status-colors)))
 	(unless (and (string= color cj/-cursor-last-color)
 				 (string= (buffer-name) cj/-cursor-last-buffer))
 	  (set-cursor-color color)