refactor(gui): projection keys import the domain packages' client outlets (single source)

The consumer-side restated declare-merges retire (user ruling: one home per
projection key): TodoPanel imports the todos merge and TodoItem through
@deepseek-ai/dsh-tool-todo/client, and the manager takes the title merge
through @deepseek-ai/dsh-session-title/client — both pure-type outlets
re-exporting the domain's single-source types.ts, so no host value import or
Context merge enters the client program (type-only edges, exempt from the
plugin value-import ban). Workspace deps and tsconfig references added.
Also aligns the fixture's empty-log tail block with the host convention
(asOfSeq -1 with empty values, block always present on tail requests).

packages/client/runtime/tsconfig.json

@@ -26,6 +26,9 @@
     {
       "path": "../../session-projection/session-projection"
     },
+    {
+      "path": "../../session-title/session-title"
+    },
     {
       "path": "../../llm/llm"
     },