Overhaul parquet viewer: full encoding support + rich navigation

CLAUDE.md

@@ -18,16 +18,16 @@ cargo test test_name           # single test
 cargo test test_name -- --nocapture  # with stdout
 cargo fmt --check              # format check
 cargo fmt                      # format fix
-cargo clippy -- -D warnings    # lint (CI enforces -D warnings)
+cargo clippy --all-targets     # lint (no -D warnings — see "Fixing issues")
 ```
 
-CI runs: fmt check, clippy with `-D warnings`, tests on both Ubuntu and macOS.
+CI runs: fmt check, clippy, tests on both Ubuntu and macOS.
 
 ## Fixing issues
 
 Fix every issue you encounter, even if it's pre-existing and unrelated to your current task — do not leave broken clippy lints, failing tests, fmt drift, or compiler warnings for a later PR. If CI is red because of a problem that exists on master, fix it here rather than skipping it. Scope creep from a few mechanical fixes is cheaper than a persistently red main branch.
 
-`cargo clippy -- -D warnings` is not good enough — it only checks the default (bin) target. Always verify with `cargo clippy --all-targets -- -D warnings` so test-code lints are not missed, and fix anything it surfaces.
+Do **not** pass `-D warnings` to clippy when you run it locally. Run plain `cargo clippy --all-targets` so warnings surface without aborting the build on the first hit — that lets you read the full list and fix them together. Every reported warning still needs to be fixed before the change lands, because CI does treat warnings as errors; "the command exited 0 without `-D`" is not a substitute for a clean warning-free output.
 
 ## Architecture
 

Cargo.toml

@@ -32,6 +32,7 @@ ignore = "0.4"
 grep-regex = "0.1"
 grep-searcher = "0.1"
 grep-matcher = "0.1"
+regex = "1"
 parquet2 = { git = "https://github.com/questdb/parquet2", branch = "main" }
 tar = "0.4"
 flate2 = "1"

src/action.rs

@@ -128,6 +128,48 @@ pub enum Action {
     // Help
     ShowHelp,
 
+    // Parquet viewer
+    ParquetSearchOpen,
+    ParquetSearchChar(char),
+    ParquetSearchBackspace,
+    ParquetSearchAccept,
+    ParquetSearchCancel,
+    ParquetSearchNext,
+    ParquetSearchPrev,
+    ParquetCopyCell,
+    ParquetCopyRow,
+    ParquetPageLeft,
+    ParquetPageRight,
+    ParquetRowDetail,
+    ParquetExportCsv,
+    ParquetExportCsvAll,
+    ParquetNextRowGroup,
+    ParquetPrevRowGroup,
+    ParquetToggleSelect,
+    ParquetClearSelect,
+    ParquetCopyColumn,
+    ParquetColWiden,
+    ParquetColNarrow,
+    ParquetColReset,
+    ParquetColFreezeToggle,
+    ParquetCopyRowJson,
+    ParquetExportNdjson,
+    ParquetColHide,
+    ParquetColUnhideAll,
+    ParquetColFirst,
+    ParquetColLast,
+    ParquetColAutofit,
+    ParquetColInfo,
+    ParquetReload,
+    ParquetToggleThousands,
+    ParquetSelectAll,
+    ParquetInvertSelection,
+    ParquetSearchCurrentForward,
+    ParquetSearchCurrentBackward,
+    ParquetHalfPageUp,
+    ParquetHalfPageDown,
+    ParquetCycleSort,
+
     // Menu
     OpenMenu,