chore(claude): stop managing settings.json

Claude Code rewrites ~/.claude/settings.json itself, so the nix copy drifted
within every session and `nh home switch` aborted on the diff. Drops the
mutableFiles entries and the two tracked JSON sources.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

home/common/programs/claude/default.nix

@@ -19,6 +19,9 @@
     description = "--force-device-scale-factor value for Claude Desktop and T3 Code.";
   };
 
+  # ~/.claude/settings.json stays unmanaged: Claude Code rewrites it itself
+  # (model pins, permission grants, plugin state), so any nix copy drifts within
+  # a session and every `nh home switch` then aborts on the diff.
   config.home = {
     packages = with pkgs; [
       inputs.claude-code.packages.${pkgs.stdenv.hostPlatform.system}.default
@@ -47,6 +50,5 @@
       };
     };
 
-    mutableFiles.".claude/settings.json".source = ./settings.json;
   };
 }

home/common/programs/claude/settings.json

@@ -1,86 +0,0 @@
-{
-  "$schema": "https://json.schemastore.org/claude-code-settings.json",
-  "permissions": {
-    "allow": [
-      "Edit",
-      "Write",
-      "Bash(ls:*)",
-      "Bash(tree:*)",
-      "Bash(cat:*)",
-      "Bash(head:*)",
-      "Bash(tail:*)",
-      "Bash(find:*)",
-      "Bash(fd:*)",
-      "Bash(grep:*)",
-      "Bash(rg:*)",
-      "Bash(wc:*)",
-      "Bash(sort:*)",
-      "Bash(uniq:*)",
-      "Bash(diff:*)",
-      "Bash(pwd:*)",
-      "Bash(which:*)",
-      "Bash(jq:*)",
-      "Bash(git:*)",
-      "Bash(gh:*)",
-      "Bash(sed:*)",
-      "Bash(cp:*)",
-      "Bash(chmod:*)",
-      "Bash(mkdir:*)",
-      "Bash(kitty @ set-tab-title:*)"
-    ],
-    "additionalDirectories": [
-      "/home/naps62/projects",
-      "/home/naps62/ethui",
-      "/home/naps62/labs",
-      "/home/naps62/subvisual"
-    ]
-  },
-  "model": "opus[1m]",
-  "statusLine": {
-    "type": "command",
-    "command": "~/.claude/statusline.sh"
-  },
-  "enabledPlugins": {
-    "typescript-lsp@claude-plugins-official": true
-  },
-  "extraKnownMarketplaces": {
-    "impeccable": {
-      "source": {
-        "source": "github",
-        "repo": "pbakaus/impeccable"
-      }
-    }
-  },
-  "sandbox": {
-    "enabled": true,
-    "autoAllowBashIfSandboxed": false,
-    "allowedNetworkHosts": [
-      "github.com",
-      "api.github.com",
-      "raw.githubusercontent.com",
-      "gist.github.com",
-      "release-assets.githubusercontent.com"
-    ]
-  },
-  "tui": "fullscreen",
-  "voiceEnabled": true,
-  "defaultMode": "acceptEdits",
-  "feedbackSurveyState": {
-    "lastShownTime": 1754052643456
-  },
-  "mcpServers": {
-    "herd-mcp": {
-      "type": "http",
-      "url": "https://mcp.herd.eco/v1"
-    },
-    "linear": {
-      "type": "http",
-      "url": "https://mcp.linear.app/mcp"
-    },
-    "home-assistant": {
-      "type": "http",
-      "url": "https://ha-mcp.n62.casa/mcp"
-    }
-  },
-  "agentPushNotifEnabled": true
-}