palette: replace the stock Ctrl+P command palette with real ida-tui actions

The Ctrl+P palette was Textual's stock system commands (change theme / take
screenshot / quit) -- useless for RE. Add an IdaCommands command Provider and set
IdaTui.COMMANDS = {IdaCommands} so the palette lists real actions instead:
goto, find symbol, follow, xrefs, toggle disasm/pseudocode, continuous listing,
hex, rename, retype, comment, define code/func, make data/string, undefine,
toggle opcodes, structs editor, filter, names pane, save, quit -- each with its
keybind as help text, fuzzy-searchable.

App-level actions run directly; cursor-scoped ones (rename/xrefs/comment/...) are
dispatched to the active code view via IdaTui._palette_action (focus + run the
view's action_*), so a palette pick does exactly what the key does.

Verified live over RPC: 'hex' switches view, 'goto' opens the prompt, 'struct'
opens the StructEditor modal, and the stock 'theme' command is gone. Pilot
command_palette scenario: Ctrl+P opens it and a command executes (7/7).

1 files changed, 23 insertions, 0 deletions

diff --git a/tests/test_scenarios.py b/tests/test_scenarios.py
index 1a07fb4..94baf93 100644
--- a/tests/test_scenarios.py
+++ b/tests/test_scenarios.py
@@ -315,6 +315,29 @@ async def s_palette(c: Ctx):
     c.check("Esc closes the palette", not isinstance(app.screen, SymbolPalette))
 
 
+@scenario("command_palette")
+async def s_command_palette(c: Ctx):
+    app = c.app
+    await c.open_biggest("listing")
+    await c.press("ctrl+p")
+    opened = await c.wait(
+        lambda: type(app.screen).__name__ == "CommandPalette", 10)
+    c.check("Ctrl+P opens the command palette", opened,
+            f"screen={type(app.screen).__name__}")
+    if not opened:
+        return
+    inp = app.screen.query_one(Input)
+    inp.value = "hex"  # filter to the 'Hex view' command
+    await c.pause(0.5)  # let the async search + option list settle
+    await c.press("enter")
+    landed = await c.wait(lambda: app._active == "hex", 10)
+    c.check("a palette command executes (Hex view opens)", landed,
+            f"active={app._active}")
+    if landed:
+        await c.press("backslash")  # leave hex
+        await c.wait(lambda: app._active != "hex", 5)
+
+
 @scenario("decomp_fallback")
 async def s_fallback(c: Ctx):
     app = c.app