feat(cli): even out the shipped tool rosters across both surfaces

The two shipped surfaces offered different tools for no recorded reason:
session checkpoints, tool-result pruning, the goal tools, and Ralph were in
`tui.cordis.yml`; `tool-todo` and web search were in `web.cordis.yml`. Neither
offered session search, a string-replacement editor, or a repeat-tool guard,
though none of the three is surface-specific.

Move the rows that are not surface-specific into `base.cordis.yml` and add
those three. Web search moves there too — the TUI decision the change that
made it a Web default deferred. Both surfaces now assemble the same 27 tools.

This adds only. No row is removed from either surface and no existing row's
configuration is edited: executors, sandbox composition, access defaults,
`tools.mode`, and the workflow tool are exactly what they were. Two rows stay
surface-specific: `tmux-context` (no terminal multiplexer in a browser) and
`session-reference` (its index has one writer owner).

Ship `dsh-mcp-client` as a dependency without a row: the plugin mounts one
server per instance and `command` is required, so a default would name a
third-party server and spawn it outside `ctx.bash` on every launch. The CLI
README carries the YAML for mounting one from a personal config.

apps/cli/config/tui.cordis.yml

@@ -71,29 +71,17 @@
     - id: agent-loop-invariant
       name: '@deepseek-ai/dsh-agent-loop/invariant'
 
-    - id: session-checkpoint-policy
-      name: '@deepseek-ai/dsh-session-checkpoint-policy'
-
     # The derived query index behind `/resume`. The launcher provides a unique
     # process-local path because this SQLite backend has one writer owner; the
     # project-local fallback applies when no launcher sets the typed slot.
     - id: session-reference
       name: '@deepseek-ai/dsh-session-reference'
 
-    # Compacts oversized tool results before the broader conversation compactor
-    # runs, preserving the model-visible result within the configured budget.
-    - id: tool-result-prune
-      name: '@deepseek-ai/dsh-compact-tool-result-prune'
-
-    # Persisted same-session goals reach the model and the slash menu here; the
-    # domain, driver, and `/goal` command are in the base.
-    - id: tool-goal
-      name: '@deepseek-ai/dsh-tool-goal'
-
-    # A separate fixed consumer demonstrates fresh-agent Ralph iteration without
-    # changing the workflow tool or same-session goal behavior.
-    - id: tool-ralph
-      name: '@deepseek-ai/dsh-tool-ralph'
+    # Terminal-multiplexer context, mounted only where a terminal exists.
+    - id: tmux-context
+      name: '@deepseek-ai/dsh-tmux-context'
+      config:
+        refreshIntervalMs: 900000
 
     # The keyboard-backed provider behind ask_user_question and the plan-mode
     # review, and the front door it renders inside.