Add local-only mode for contracts with patch export support (#34)

* Add local_only flag to contracts database and models

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

* Task completion checkpoint

* Skip automatic completion actions in local_only mode

Add `local_only` flag to contracts that prevents automatic completion
actions (branch, merge, pr) from executing when tasks complete. This
allows users to manually handle code changes via patch files or other
means when operating in local-only mode.

Changes:
- Add `local_only` field to Contract model and request types
- Add database migration for the new column
- Add `local_only` parameter to SpawnTask command in both state.rs and
  daemon protocol.rs
- Modify task manager to skip completion action execution when
  `local_only` is true, with appropriate logging
- Pass `local_only` flag through all task spawning paths:
  - mesh_supervisor.rs (task spawn, retry, resume)
  - mesh.rs (task start, reassign, continue)
  - mesh_chat.rs (run task)
  - contract_chat.rs (run task)
- Update repository create/update functions to handle `local_only`

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

* Task completion checkpoint

* Implement core patch export system

Add functionality to create uncompressed, human-readable git patches
for export. This enables users to generate patches that can be manually
applied or shared, without the compression used for internal checkpoints.

Changes:
- Add ExportPatchResult struct with patch content, file count, and line stats
- Add create_export_patch() function that generates diffs against a base SHA
- Add get_head_sha() utility function
- Add parse_diff_stat() helper to extract line counts from git output
- Add CreateExportPatch command to daemon protocol
- Add ExportPatchCreated response message to protocol
- Add handler in task manager to process export patch requests
- Add server-side handling to broadcast patch results to UI

The export patch system automatically finds the merge-base when no base
SHA is provided, trying upstream tracking branch first, then common
default branches (origin/main, origin/master, main, master).

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

* Task completion checkpoint

* Add GitActionsPanel frontend component

* Add WorktreeFilesPanel and PatchesListPanel components

* Add local-only mode toggle to contract creation

---------

Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>

1 files changed, 197 insertions, 0 deletions

diff --git a/makima/frontend/src/components/mesh/WorktreeFilesPanel.tsx b/makima/frontend/src/components/mesh/WorktreeFilesPanel.tsx
new file mode 100644
index 0000000..b529588
--- /dev/null
+++ b/makima/frontend/src/components/mesh/WorktreeFilesPanel.tsx
@@ -0,0 +1,197 @@
+import { useState, useEffect, useCallback } from "react";
+import type { WorktreeInfo } from "../../lib/api";
+import { getWorktreeInfo } from "../../lib/api";
+
+interface WorktreeFilesPanelProps {
+  taskId: string;
+}
+
+/** Get status badge styling based on file status */
+function getStatusStyle(status: string): { color: string; bgColor: string; label: string } {
+  switch (status) {
+    case "M":
+    case "modified":
+      return { color: "text-yellow-400", bgColor: "bg-yellow-400/10", label: "M" };
+    case "A":
+    case "added":
+      return { color: "text-green-400", bgColor: "bg-green-400/10", label: "A" };
+    case "D":
+    case "deleted":
+      return { color: "text-red-400", bgColor: "bg-red-400/10", label: "D" };
+    case "R":
+    case "renamed":
+      return { color: "text-cyan-400", bgColor: "bg-cyan-400/10", label: "R" };
+    case "C":
+    case "copied":
+      return { color: "text-purple-400", bgColor: "bg-purple-400/10", label: "C" };
+    case "U":
+    case "unmerged":
+      return { color: "text-orange-400", bgColor: "bg-orange-400/10", label: "U" };
+    case "?":
+    case "untracked":
+      return { color: "text-[#555]", bgColor: "bg-[#555]/10", label: "?" };
+    default:
+      return { color: "text-[#9bc3ff]", bgColor: "bg-[rgba(117,170,252,0.1)]", label: status.charAt(0).toUpperCase() };
+  }
+}
+
+export function WorktreeFilesPanel({ taskId }: WorktreeFilesPanelProps) {
+  const [worktreeInfo, setWorktreeInfo] = useState<WorktreeInfo | null>(null);
+  const [loading, setLoading] = useState(true);
+  const [error, setError] = useState<string | null>(null);
+  const [expanded, setExpanded] = useState(false);
+
+  const fetchWorktreeInfo = useCallback(async () => {
+    try {
+      setLoading(true);
+      setError(null);
+      const info = await getWorktreeInfo(taskId);
+      setWorktreeInfo(info);
+    } catch (e) {
+      console.error("Failed to fetch worktree info:", e);
+      setError(e instanceof Error ? e.message : "Failed to fetch worktree info");
+    } finally {
+      setLoading(false);
+    }
+  }, [taskId]);
+
+  useEffect(() => {
+    fetchWorktreeInfo();
+  }, [fetchWorktreeInfo]);
+
+  if (loading) {
+    return (
+      <div className="bg-[rgba(0,0,0,0.2)] border border-[rgba(117,170,252,0.15)] p-3">
+        <div className="font-mono text-xs text-[#9bc3ff] tracking-wide uppercase mb-2">
+          Worktree Changes
+        </div>
+        <div className="font-mono text-xs text-[#555] animate-pulse">
+          Loading worktree info...
+        </div>
+      </div>
+    );
+  }
+
+  if (error) {
+    return (
+      <div className="bg-[rgba(0,0,0,0.2)] border border-[rgba(117,170,252,0.15)] p-3">
+        <div className="flex items-center justify-between mb-2">
+          <div className="font-mono text-xs text-[#9bc3ff] tracking-wide uppercase">
+            Worktree Changes
+          </div>
+          <button
+            onClick={fetchWorktreeInfo}
+            className="font-mono text-[10px] text-[#75aafc] hover:text-[#9bc3ff] transition-colors"
+          >
+            Retry
+          </button>
+        </div>
+        <div className="font-mono text-xs text-red-400">
+          {error}
+        </div>
+      </div>
+    );
+  }
+
+  if (!worktreeInfo || worktreeInfo.files.length === 0) {
+    return (
+      <div className="bg-[rgba(0,0,0,0.2)] border border-[rgba(117,170,252,0.15)] p-3">
+        <div className="flex items-center justify-between mb-2">
+          <div className="font-mono text-xs text-[#9bc3ff] tracking-wide uppercase">
+            Worktree Changes
+          </div>
+          <button
+            onClick={fetchWorktreeInfo}
+            className="font-mono text-[10px] text-[#75aafc] hover:text-[#9bc3ff] transition-colors"
+          >
+            Refresh
+          </button>
+        </div>
+        <div className="font-mono text-xs text-[#555]">
+          No changes in worktree
+        </div>
+      </div>
+    );
+  }
+
+  const { stats, files } = worktreeInfo;
+  const displayFiles = expanded ? files : files.slice(0, 10);
+
+  return (
+    <div className="bg-[rgba(0,0,0,0.2)] border border-[rgba(117,170,252,0.15)]">
+      {/* Header */}
+      <div className="flex items-center justify-between p-3 border-b border-[rgba(117,170,252,0.1)]">
+        <div className="font-mono text-xs text-[#9bc3ff] tracking-wide uppercase">
+          Worktree Changes
+        </div>
+        <div className="flex items-center gap-3">
+          {/* Stats */}
+          <div className="flex items-center gap-2 font-mono text-[10px]">
+            <span className="text-[#75aafc]">
+              {stats.filesChanged} file{stats.filesChanged !== 1 ? "s" : ""}
+            </span>
+            <span className="text-green-400">+{stats.insertions}</span>
+            <span className="text-red-400">-{stats.deletions}</span>
+          </div>
+          <button
+            onClick={fetchWorktreeInfo}
+            className="font-mono text-[10px] text-[#555] hover:text-[#75aafc] transition-colors"
+            title="Refresh"
+          >
+            <svg className="w-3 h-3" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+              <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M4 4v5h.582m15.356 2A8.001 8.001 0 004.582 9m0 0H9m11 11v-5h-.581m0 0a8.003 8.003 0 01-15.357-2m15.357 2H15" />
+            </svg>
+          </button>
+        </div>
+      </div>
+
+      {/* File list */}
+      <div className="divide-y divide-[rgba(117,170,252,0.05)]">
+        {displayFiles.map((file) => {
+          const statusStyle = getStatusStyle(file.status);
+          return (
+            <div
+              key={file.path}
+              className="flex items-center gap-2 px-3 py-1.5 hover:bg-[rgba(117,170,252,0.03)]"
+            >
+              {/* Status badge */}
+              <span
+                className={`w-5 h-5 flex items-center justify-center font-mono text-[10px] font-medium ${statusStyle.color} ${statusStyle.bgColor} border border-current/20`}
+                title={file.status}
+              >
+                {statusStyle.label}
+              </span>
+
+              {/* File path */}
+              <span className="flex-1 font-mono text-xs text-[#dbe7ff] truncate" title={file.path}>
+                {file.path}
+              </span>
+
+              {/* Line stats */}
+              <div className="flex items-center gap-1.5 font-mono text-[10px] shrink-0">
+                {file.linesAdded > 0 && (
+                  <span className="text-green-400">+{file.linesAdded}</span>
+                )}
+                {file.linesRemoved > 0 && (
+                  <span className="text-red-400">-{file.linesRemoved}</span>
+                )}
+              </div>
+            </div>
+          );
+        })}
+      </div>
+
+      {/* Show more/less button */}
+      {files.length > 10 && (
+        <div className="px-3 py-2 border-t border-[rgba(117,170,252,0.1)]">
+          <button
+            onClick={() => setExpanded(!expanded)}
+            className="font-mono text-[10px] text-[#75aafc] hover:text-[#9bc3ff] transition-colors"
+          >
+            {expanded ? `Show less` : `Show ${files.length - 10} more files...`}
+          </button>
+        </div>
+      )}
+    </div>
+  );
+}