refactor(ai-vterm): rename Claude-specific names to a generic "agent"

I may add other terminal agents to this launcher (aider, an open-source LLM TUI), so the buffer prefix, the user knob, and the internal helpers shouldn't say "Claude". The module name (ai-vterm) and the `cj/ai-vterm-*` customs were already generic. This finishes the job:

- buffer prefix `claude [<basename>]` -> `agent [<basename>]` (the `defconst` and the matching display-buffer-alist regex move together)
- `cj/ai-vterm-claude-command` -> `cj/ai-vterm-agent-command` (the default still runs the `claude` CLI, with a docstring note on swapping it)
- `cj/--ai-vterm-claude-buffers` / `-displayed-claude-window` / `-reuse-existing-claude` -> `-agent-*`, and their test files renamed to match
- prose in the module commentary and docstrings, plus the matching test docstrings and buffer-name literals

`vterm-config.el` hardcodes the same buffer prefix in `cj/--vterm-toggle-buffer-p` (F12 excludes agent buffers from its candidate set), so that literal moved too. Collapsing it into the shared `cj/--ai-vterm-name-prefix` is a cleanup for another day.

After a reload, a project's buffer opens as `agent [foo]` instead of `claude [foo]`. Old buffers keep their names until killed. I also corrected two stale `eshell-vterm-config.el` references in ai-vterm.el docstrings (that module was split into `vterm-config.el`).

Two things keep saying "Claude": the `cj/ai-vterm-agent-command` default value (the actual CLI), and the "Claude Code" example in `vterm-config.el`'s cursor-restore docstring (a concrete TUI example, not branding).

90 tests pass. `make validate-modules` clean.

1 files changed, 0 insertions, 99 deletions

diff --git a/tests/test-ai-vterm--reuse-existing-claude.el b/tests/test-ai-vterm--reuse-existing-claude.el
deleted file mode 100644
index 195e50a2..00000000
--- a/tests/test-ai-vterm--reuse-existing-claude.el
+++ /dev/null
@@ -1,99 +0,0 @@
-;;; test-ai-vterm--reuse-existing-claude.el --- Tests for reuse-existing-claude action -*- lexical-binding: t; -*-
-
-;;; Commentary:
-;; The action looks for any window in the selected frame whose buffer
-;; satisfies `cj/--ai-vterm-buffer-p'.  When found, swaps that
-;; window's buffer for the one being displayed and returns the
-;; window.  When not found, returns nil so the next action in the
-;; chain runs.
-;;
-;; This is the action that keeps C-F9 (project-switch) from stealing
-;; a non-claude window when the user is focused inside claude.
-
-;;; Code:
-
-(require 'ert)
-
-(add-to-list 'load-path (expand-file-name "modules" user-emacs-directory))
-(add-to-list 'load-path (expand-file-name "tests" user-emacs-directory))
-(require 'ai-vterm)
-(require 'testutil-vterm-buffers)
-
-(ert-deftest test-ai-vterm--reuse-existing-claude-swaps-buffer-when-window-exists ()
-  "Normal: a claude window exists -> swap its buffer, return the window."
-  (cj/test--kill-claude-buffers)
-  (save-window-excursion
-    (delete-other-windows)
-    (let ((existing (get-buffer-create "claude [existing]"))
-          (new-buf (get-buffer-create "claude [new]"))
-          (split (split-window (selected-window) nil 'right)))
-      (unwind-protect
-          (progn
-            (set-window-buffer split existing)
-            (let ((result (cj/--ai-vterm-reuse-existing-claude new-buf nil)))
-              (should (eq result split))
-              (should (eq (window-buffer split) new-buf))))
-        (kill-buffer existing)
-        (kill-buffer new-buf)))))
-
-(ert-deftest test-ai-vterm--reuse-existing-claude-returns-nil-when-no-claude-window ()
-  "Boundary: no claude window in frame -> nil (chain continues to next action)."
-  (cj/test--kill-claude-buffers)
-  (save-window-excursion
-    (delete-other-windows)
-    (let ((new-buf (get-buffer-create "claude [no-existing]")))
-      (unwind-protect
-          (should (null (cj/--ai-vterm-reuse-existing-claude new-buf nil)))
-        (kill-buffer new-buf)))))
-
-(ert-deftest test-ai-vterm--reuse-existing-claude-leaves-non-claude-windows-alone ()
-  "Boundary: only non-claude windows in frame -> nil; other windows untouched."
-  (cj/test--kill-claude-buffers)
-  (save-window-excursion
-    (delete-other-windows)
-    (let ((code-buf (get-buffer-create "*test-code-buffer*"))
-          (new-claude (get-buffer-create "claude [new-here]"))
-          (other-win (split-window (selected-window) nil 'right)))
-      (unwind-protect
-          (progn
-            (set-window-buffer (selected-window) code-buf)
-            (set-window-buffer other-win code-buf)
-            (let ((result (cj/--ai-vterm-reuse-existing-claude
-                           new-claude nil)))
-              (should (null result))
-              (should (eq (window-buffer (selected-window)) code-buf))
-              (should (eq (window-buffer other-win) code-buf))))
-        (kill-buffer code-buf)
-        (kill-buffer new-claude)))))
-
-(ert-deftest test-ai-vterm--reuse-existing-claude-preserves-non-claude-window-when-swapping ()
-  "Normal: swap claude window only; the other window keeps its buffer.
-
-This is the C-F9-from-claude regression: with claude at the bottom
-and code on top, switching projects must replace the bottom window's
-buffer, not the top window's."
-  (cj/test--kill-claude-buffers)
-  (save-window-excursion
-    (delete-other-windows)
-    (let* ((code-buf (get-buffer-create "*test-code-top*"))
-           (claude-a (get-buffer-create "claude [a]"))
-           (claude-b (get-buffer-create "claude [b]"))
-           (top-win (selected-window))
-           (bottom-win (split-window top-win nil 'below)))
-      (unwind-protect
-          (progn
-            (set-window-buffer top-win code-buf)
-            (set-window-buffer bottom-win claude-a)
-            ;; Focus the claude window -- this is the regression scenario.
-            (select-window bottom-win)
-            (let ((result (cj/--ai-vterm-reuse-existing-claude
-                           claude-b nil)))
-              (should (eq result bottom-win))
-              (should (eq (window-buffer bottom-win) claude-b))
-              (should (eq (window-buffer top-win) code-buf))))
-        (kill-buffer code-buf)
-        (kill-buffer claude-a)
-        (kill-buffer claude-b)))))
-
-(provide 'test-ai-vterm--reuse-existing-claude)
-;;; test-ai-vterm--reuse-existing-claude.el ends here