feat(plugins): add fff fuzzy finder and supermaven LeetCode toggle plugins

lua/plugins/fff.lua

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+--- fff.nvim: rust-backed fuzzy file finder and live grep with frecency
+--- Backs the <C-f> file/grep bindings in plugins/astrocore.lua. Honours
+--- .gitignore plus per-repo .ignore files; the config.ignore_patterns
+--- snacks filter does not apply here (snacks remains for non-file sources:
+--- diagnostics, lines, LSP symbols, recent, projects, templates).
+--- @module plugins.fff
+
+return {
+  "dmtrKovalenko/fff",
+  build = function()
+    -- downloads a prebuilt binary or falls back to cargo build
+    require("fff.download").download_or_build_binary()
+  end,
+  lazy = false, -- the plugin lazy-initialises itself
+  opts = {
+    lazy_sync = true,
+  },
+}

lua/plugins/supermaven.lua

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+-- Disable supermaven in JavaScript/Python buffers whose comments contain a
+-- LeetCode problem URL (solution files), and re-enable it when leaving them.
+--
+-- Note: supermaven's built-in `condition` option is one-way — its BufEnter
+-- listener gates the restart branch on `vim.g.SUPERMAVEN_DISABLED`, which
+-- `api.stop()` itself sets, so once auto-stopped it never comes back. This
+-- autocmd owns both directions instead. `vim.g.supermaven_leetcode_stopped`
+-- distinguishes our auto-stop from a manual :SupermavenStop, which stays off.
+local function is_leetcode_buffer()
+  local buf = vim.api.nvim_get_current_buf()
+  local ft = vim.bo[buf].filetype
+  local name = vim.api.nvim_buf_get_name(buf)
+  local comment_pat
+  if ft == "javascript" or ft == "javascriptreact" or name:match "%.[mc]?jsx?$" then
+    comment_pat = "^%s*[/*]"
+  elseif ft == "python" or name:match "%.py$" then
+    comment_pat = "^%s*[#\"']"
+  else
+    return false
+  end
+  -- The URL lives in the header comment block; scanning the top of the file is enough.
+  for _, line in ipairs(vim.api.nvim_buf_get_lines(buf, 0, 200, false)) do
+    if line:find "leetcode%.com/problems/" and line:match(comment_pat) then return true end
+  end
+  return false
+end
+
+local function sync()
+  local api = require "supermaven-nvim.api"
+  if is_leetcode_buffer() then
+    if api.is_running() then
+      api.stop()
+      vim.g.supermaven_leetcode_stopped = true
+    end
+  elseif vim.g.supermaven_leetcode_stopped and not api.is_running() then
+    vim.g.supermaven_leetcode_stopped = nil
+    api.start()
+  end
+end
+
+return {
+  "supermaven-inc/supermaven-nvim",
+  optional = true,
+  config = function(_, opts)
+    require("supermaven-nvim").setup(opts)
+    vim.api.nvim_create_autocmd("BufEnter", {
+      group = vim.api.nvim_create_augroup("supermaven_leetcode", { clear = true }),
+      desc = "Toggle supermaven off in LeetCode solution buffers",
+      callback = sync,
+    })
+    sync() -- plugin loads on VeryLazy; cover the buffer we're already sitting in
+  end,
+}

templates/mdx/accordion.mdx

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+<Accordion>
+  <AccordionItem title="{{_cursor_}}">
+    Answer.
+  </AccordionItem>
+  <AccordionItem title="">
+    Answer.
+  </AccordionItem>
+</Accordion>

templates/mdx/badge.mdx

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+<Badge variant="accent">{{_cursor_}}</Badge>

templates/mdx/card_group.mdx

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+<CardGroup cols={2}>
+  <Card title="{{_cursor_}}" href="" icon="">
+    Description.
+  </Card>
+  <Card title="" href="" icon="">
+    Description.
+  </Card>
+</CardGroup>

templates/mdx/code_group.mdx

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+<CodeGroup>
+
+```ts TypeScript
+{{_cursor_}}
+```
+
+```python Python
+
+```
+
+</CodeGroup>

templates/mdx/color.mdx

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+<Color variant="compact">
+  <Color.Item name="{{_cursor_}}" value="#3B82F6" />
+  <Color.Item name="" value={{ light: "#FFFFFF", dark: "#0A0A0A" }} />
+</Color>

templates/mdx/columns.mdx

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+<Columns cols={2}>
+  <Column>
+    {{_cursor_}}
+  </Column>
+  <Column>
+
+  </Column>
+</Columns>

templates/mdx/component_preview.mdx

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+<Component path="{{_cursor_}}" />

templates/mdx/diff.mdx

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+<Diff
+  lang="{{_cursor_}}"
+  old={`before`}
+  new={`after`}
+/>

templates/mdx/expandable.mdx

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+<Expandable title="{{_cursor_}}">
+  Hidden detail.
+</Expandable>

templates/mdx/file_tree.mdx

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+<FileTree>
+
+- {{_cursor_}}
+  - index.mdx
+
+</FileTree>

templates/mdx/frame.mdx

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+<Frame caption="{{_cursor_}}" hint="">
+  <img src="" alt="" />
+</Frame>

templates/mdx/frontmatter_blog.mdx

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+---
+title: {{_cursor_}}
+description:
+type: blog
+date: {{_lua:os.date("%Y-%m-%d")_}}
+authors:
+  - {{_author_}}
+---

templates/mdx/frontmatter_changelog.mdx

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+---
+title: {{_cursor_}}
+description:
+type: changelog
+changelog:
+  version: 0.0.0
+  date: {{_lua:os.date("%Y-%m-%d")_}}
+  category: Features
+---

templates/mdx/frontmatter_doc.mdx

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+---
+title: {{_cursor_}}
+description:
+---

templates/mdx/frontmatter_full.mdx

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+---
+title: {{_cursor_}}
+description:
+type: doc
+slug:
+draft: false
+lastModified: {{_lua:os.date("%Y-%m-%d")_}}
+sidebar:
+  label:
+  order: 1
+  icon:
+  badge:
+  hidden: false
+seo:
+  title:
+  description:
+  image:
+  canonical:
+  noindex: false
+search:
+  exclude: false
+  tags: []
+---

templates/mdx/github_info.mdx

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+<GithubInfo owner="{{_cursor_}}" repo="" />

templates/mdx/icon.mdx

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+<Icon icon="{{_cursor_}}" size={16} />

templates/mdx/panel.mdx

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+<Panel title="{{_cursor_}}">
+  Supporting detail.
+</Panel>

templates/mdx/prompt.mdx

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+<Prompt description="{{_cursor_}}" actions={["copy"]}>
+  The prompt text copied to the clipboard.
+</Prompt>

templates/mdx/steps.mdx

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+<Steps>
+  <Step title="{{_cursor_}}">
+    First step.
+  </Step>
+  <Step title="">
+    Second step.
+  </Step>
+</Steps>

templates/mdx/tabs.mdx

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+<Tabs>
+  <Tab title="{{_cursor_}}">
+    First tab.
+  </Tab>
+  <Tab title="">
+    Second tab.
+  </Tab>
+</Tabs>

templates/mdx/tile.mdx

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+<Tile title="{{_cursor_}}" description="" href="">
+  <Icon icon="rocket" size={28} />
+</Tile>

templates/mdx/tooltip.mdx

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+<Tooltip tip="{{_cursor_}}" headline="" cta="" href="">term</Tooltip>

templates/mdx/tree_folders.mdx

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+<Tree>
+  <Tree.Folder name="{{_cursor_}}" defaultOpen>
+    <Tree.File name="index.ts" />
+  </Tree.Folder>
+  <Tree.File name="" />
+</Tree>

templates/mdx/type_table_auto.mdx

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+<AutoTypeTable path="{{_cursor_}}" name="" />

templates/mdx/type_table_manual.mdx

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+<TypeTable
+  type={{
+    {{_cursor_}}: {
+      type: "string",
+      required: true,
+      description: "",
+    },
+  }}
+/>

templates/mdx/visibility.mdx

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+<Visibility for="{{_cursor_}}">
+  Audience-specific content.
+</Visibility>

templates/mdx/youtube.mdx

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+<YouTube id="{{_cursor_}}" title="" />