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, 236 insertions, 0 deletions

diff --git a/makima/frontend/src/components/mesh/PatchesListPanel.tsx b/makima/frontend/src/components/mesh/PatchesListPanel.tsx
new file mode 100644
index 0000000..b63d7e7
--- /dev/null
+++ b/makima/frontend/src/components/mesh/PatchesListPanel.tsx
@@ -0,0 +1,236 @@
+import { useState, useEffect, useCallback } from "react";
+import type { PatchSummary } from "../../lib/api";
+import { listTaskPatches } from "../../lib/api";
+
+interface PatchesListPanelProps {
+  taskId: string;
+  contractId: string;
+}
+
+/** Format a date for display */
+function formatDate(dateStr: string): string {
+  const date = new Date(dateStr);
+  return date.toLocaleDateString("en-US", {
+    month: "short",
+    day: "numeric",
+    hour: "2-digit",
+    minute: "2-digit",
+  });
+}
+
+/** Copy text to clipboard and show feedback */
+async function copyToClipboard(text: string): Promise<boolean> {
+  try {
+    await navigator.clipboard.writeText(text);
+    return true;
+  } catch {
+    // Fallback for older browsers
+    const textArea = document.createElement("textarea");
+    textArea.value = text;
+    textArea.style.position = "fixed";
+    textArea.style.left = "-999999px";
+    textArea.style.top = "-999999px";
+    document.body.appendChild(textArea);
+    textArea.select();
+    try {
+      document.execCommand("copy");
+      return true;
+    } catch {
+      return false;
+    } finally {
+      document.body.removeChild(textArea);
+    }
+  }
+}
+
+export function PatchesListPanel({ taskId, contractId }: PatchesListPanelProps) {
+  const [patches, setPatches] = useState<PatchSummary[]>([]);
+  const [loading, setLoading] = useState(true);
+  const [error, setError] = useState<string | null>(null);
+  const [copiedPatchId, setCopiedPatchId] = useState<string | null>(null);
+  const [expandedPatchId, setExpandedPatchId] = useState<string | null>(null);
+
+  const fetchPatches = useCallback(async () => {
+    try {
+      setLoading(true);
+      setError(null);
+      const patchList = await listTaskPatches(taskId, contractId);
+      setPatches(patchList);
+    } catch (e) {
+      console.error("Failed to fetch patches:", e);
+      setError(e instanceof Error ? e.message : "Failed to fetch patches");
+    } finally {
+      setLoading(false);
+    }
+  }, [taskId, contractId]);
+
+  useEffect(() => {
+    fetchPatches();
+  }, [fetchPatches]);
+
+  const handleCopyApplyCommand = useCallback(async (patch: PatchSummary) => {
+    // Generate the apply command for this patch
+    const command = `makima patch apply ${patch.id}`;
+    const success = await copyToClipboard(command);
+    if (success) {
+      setCopiedPatchId(patch.id);
+      setTimeout(() => setCopiedPatchId(null), 2000);
+    }
+  }, []);
+
+  const handleViewPatch = useCallback((patchId: string) => {
+    setExpandedPatchId(expandedPatchId === patchId ? null : patchId);
+  }, [expandedPatchId]);
+
+  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">
+          Exported Patches
+        </div>
+        <div className="font-mono text-xs text-[#555] animate-pulse">
+          Loading patches...
+        </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">
+            Exported Patches
+          </div>
+          <button
+            onClick={fetchPatches}
+            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 (patches.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">
+            Exported Patches
+          </div>
+          <button
+            onClick={fetchPatches}
+            className="font-mono text-[10px] text-[#75aafc] hover:text-[#9bc3ff] transition-colors"
+          >
+            Refresh
+          </button>
+        </div>
+        <div className="font-mono text-xs text-[#555]">
+          No patches exported yet
+        </div>
+      </div>
+    );
+  }
+
+  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">
+          Exported Patches
+        </div>
+        <div className="flex items-center gap-2">
+          <span className="font-mono text-[10px] text-[#75aafc]">
+            {patches.length} patch{patches.length !== 1 ? "es" : ""}
+          </span>
+          <button
+            onClick={fetchPatches}
+            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>
+
+      {/* Patch list */}
+      <div className="divide-y divide-[rgba(117,170,252,0.1)]">
+        {patches.map((patch) => (
+          <div
+            key={patch.id}
+            className="p-3"
+          >
+            {/* Patch header */}
+            <div className="flex items-start justify-between gap-2 mb-2">
+              <div className="flex-1 min-w-0">
+                <div className="font-mono text-sm text-[#dbe7ff] truncate" title={patch.name}>
+                  {patch.name}
+                </div>
+                <div className="flex flex-wrap items-center gap-x-3 gap-y-1 mt-1 font-mono text-[10px] text-[#555]">
+                  <span title={new Date(patch.createdAt).toLocaleString()}>
+                    {formatDate(patch.createdAt)}
+                  </span>
+                  <span>
+                    {patch.filesCount} file{patch.filesCount !== 1 ? "s" : ""}
+                  </span>
+                  <span className="text-green-400">+{patch.linesAdded}</span>
+                  <span className="text-red-400">-{patch.linesRemoved}</span>
+                </div>
+              </div>
+            </div>
+
+            {/* Action buttons */}
+            <div className="flex flex-wrap gap-2">
+              <button
+                onClick={() => handleViewPatch(patch.id)}
+                className="px-2 py-1 font-mono text-[10px] text-[#9bc3ff] border border-[rgba(117,170,252,0.25)] hover:border-[#3f6fb3] hover:bg-[rgba(117,170,252,0.05)] transition-colors"
+              >
+                {expandedPatchId === patch.id ? "Hide" : "View"}
+              </button>
+              <button
+                onClick={() => handleCopyApplyCommand(patch)}
+                className={`px-2 py-1 font-mono text-[10px] border transition-colors ${
+                  copiedPatchId === patch.id
+                    ? "text-green-400 border-green-400/30 bg-green-400/10"
+                    : "text-[#9bc3ff] border-[rgba(117,170,252,0.25)] hover:border-[#3f6fb3] hover:bg-[rgba(117,170,252,0.05)]"
+                }`}
+              >
+                {copiedPatchId === patch.id ? "Copied!" : "Copy Apply Command"}
+              </button>
+            </div>
+
+            {/* Expanded patch content */}
+            {expandedPatchId === patch.id && patch.description && (
+              <div className="mt-3 p-2 bg-[rgba(0,0,0,0.2)] border border-[rgba(117,170,252,0.1)]">
+                <pre className="font-mono text-[10px] text-[#75aafc] whitespace-pre-wrap overflow-x-auto">
+                  {patch.description}
+                </pre>
+              </div>
+            )}
+
+            {/* Expanded - show files if available */}
+            {expandedPatchId === patch.id && patch.files && patch.files.length > 0 && (
+              <div className="mt-2">
+                <div className="font-mono text-[10px] text-[#555] mb-1">Changed files:</div>
+                <div className="space-y-0.5">
+                  {patch.files.map((file, idx) => (
+                    <div key={idx} className="font-mono text-[10px] text-[#75aafc] pl-2">
+                      {file}
+                    </div>
+                  ))}
+                </div>
+              </div>
+            )}
+          </div>
+        ))}
+      </div>
+    </div>
+  );
+}