chore: remove LLM module + all dependent surfaces (#135)

Wholesale removal of the LLM integration layer. ~14,200 LOC deleted
across backend and frontend. All chat-driven UIs go with it.

## Backend
- Delete `src/llm/` (7,400 LOC): claude/groq clients, contract_tools,
  contract_evaluator, discuss_tools, mesh_tools, phase_guidance,
  task_output, templates, markdown round-trip, tools, transcript_analyzer.
- Delete handlers wholly dependent on LLM:
  - `chat.rs` (file-level LLM chat at /files/{id}/chat)
  - `mesh_chat.rs` (mesh & task LLM chat + history)
  - `templates.rs` (/contract-types listing)
- Strip LLM uses from `mesh_daemon.rs`:
  - `compute_action_directive` (used phase_guidance::check_deliverables_met
    to nudge supervisors with "all tasks done" messages). The auto-PR
    path below still fires when all tasks finish, so no behaviour lost.
  - `crate::llm::markdown_to_body` → inline 1-line replacement that
    wraps markdown content in a single BodyElement::Markdown. The
    editor re-parses on display, so round-trip is preserved.
- Drop routes: /files/{id}/chat, /mesh/chat, /mesh/chat/history,
  /mesh/tasks/{id}/chat, /contract-types.
- Drop the matching openapi registrations.

## Frontend
- Delete components that were LLM-only:
  - `mesh/UnifiedMeshChatInput.tsx`
  - `listen/DiscussContractModal.tsx`
  - `listen/TranscriptAnalysisPanel.tsx`
  - `listen/ContractPickerModal.tsx`
  - `files/CliInput.tsx`
- Delete the entire /listen page (its primary value-add was
  voice → LLM analysis → contract creation; without LLM the page is
  just a transcript display with no obvious user purpose).
- Delete `hooks/useMeshChatHistory.ts` and `lib/listenApi.ts`
  (transcript-analysis API client to the already-Phase-5-removed
  listen handlers).
- Strip api.ts of LLM exports: LlmModel, ChatMessage/Request/Response,
  UserQuestion/Answer, chatWithFile, MeshChat* types & functions,
  getMeshChatHistory, clearMeshChatHistory, chatWithMeshContext,
  ContractTypeTemplate, listContractTypes, chatWithContract,
  getContractChatHistory, clearContractChatHistory, discussContract,
  PhaseDefinition, DeliverableDefinition.
- mesh.tsx: drop UnifiedMeshChatInput render + the chatContext memo +
  handleTaskUpdatedFromCli (only consumer was the input).
- files.tsx: drop CliInput render + handleGenerateFromElement +
  handleBodyUpdate + handleClearFocus + suggestedPrompt state (all
  CliInput-only).
- NavStrip: drop the /listen link.
- main.tsx: drop the /listen route.

## Net diff: 37 files changed, 58 insertions, 14,281 deletions.

Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

1 files changed, 4 insertions, 3 deletions

diff --git a/makima/src/server/handlers/mod.rs b/makima/src/server/handlers/mod.rs
index a39a4c0..5737360 100644
--- a/makima/src/server/handlers/mod.rs
+++ b/makima/src/server/handlers/mod.rs
@@ -2,9 +2,12 @@
 //!
 //! Phase 5 removed: contract_chat, contract_daemon, contract_discuss,
 //! contracts, transcript_analysis. Contracts subsystem is gone.
+//!
+//! LLM removal removed: chat, mesh_chat, templates. LLM module is gone;
+//! the chat-based UIs (file chat, mesh chat, discuss-contract,
+//! contract-type templates) were the only consumers.
 
 pub mod api_keys;
-pub mod chat;
 pub mod daemon_download;
 pub mod directive_documents;
 pub mod directives;
@@ -13,7 +16,6 @@ pub mod files;
 pub mod history;
 pub mod listen;
 pub mod mesh;
-pub mod mesh_chat;
 pub mod orders;
 pub mod mesh_daemon;
 pub mod mesh_merge;
@@ -21,7 +23,6 @@ pub mod mesh_supervisor;
 pub mod mesh_ws;
 pub mod repository_history;
 pub mod speak;
-pub mod templates;
 pub mod voice;
 pub mod users;
 pub mod versions;