Move looking out of pardes.zig into look.zig

Pure move, no behaviour change (acme keeps this in look.c): expanding the
word under a click (ExpandedWord, expandedWord, expandedSel, cursorWordSel),
the n/N walk (LookFrom, lookEdge, lookStand, lookWalkPanes, lookPast,
wholeRowSpan, lookSpanIn, lookWalk, landLookSpot, noteLookSource,
armLookWalk), search results (Search, SearchStart, submitSearch,
lookFirstHit, runSearch, searchStep, jumpResult), the look-hover preview
(LookHoverWait, LookHoverPreview, FileWordSpan, PdfWordPreview,
invalidateLookHover, cancelLookHover, lookHoverPane, noteLookHover,
refreshLookHoverFromRaw, advanceLookHover) and lookAt with its targets
(focusPaneLine, selectSpan, openPaneTarget, focusPaneByPath,
clearNavigationSelection, resolveLookTarget, locationText,
canonicalLookLocation, pdfLinkLocation, followPdfLink), with five tests, go
verbatim to the end of look.zig after its word and target resolution.

The methods become free functions taking `p: *Pardes`; their 143 call sites
change from `p.lookAt(..)` to `look.lookAt(p, ..)` (tests reach them as
`pardes.look.x`). Inside look.zig the moved code's `look.` prefix drops.

Co-Authored-By: Claude Opus 5.5 <[email protected]>

3 files changed, 6 insertions, 3 deletions

diff --git a/src/ninep/ctl.zig b/src/ninep/ctl.zig
index a3c1ab9e..25fe4037 100644
--- a/src/ninep/ctl.zig
+++ b/src/ninep/ctl.zig
@@ -6,6 +6,7 @@
 //! own would say any better: `get`, `lock` and `unlock`.
 const std = @import("std");
 const pardes = @import("../pardes.zig");
+const look = @import("../look.zig");
 const panes = @import("../panes.zig");
 const config = @import("../config.zig");
 const fs = @import("../fs.zig");
@@ -58,7 +59,7 @@ fn activeSerial(p: *Pardes) ?u32 {
 fn run(p: *Pardes, id: usize, exec: bool, text: []const u8) void {
     const context = p.panes[id].?.serial;
     const before = Serials.snapshot(p);
-    if (exec) _ = p.execute(id, text) else p.lookAt(id, text);
+    if (exec) _ = p.execute(id, text) else look.lookAt(p, id, text);
     const after = Serials.snapshot(p);
     var created = false;
     for (after.list[0..after.len]) |serial| if (!before.has(serial)) {
diff --git a/src/ninep/events.zig b/src/ninep/events.zig
index 0e8d7bb7..d4d7fcad 100644
--- a/src/ninep/events.zig
+++ b/src/ninep/events.zig
@@ -2,6 +2,7 @@
 //! bounded queues that park a read until something happens.
 const std = @import("std");
 const pardes = @import("../pardes.zig");
+const look = @import("../look.zig");
 const tree = @import("tree.zig");
 const pane_files = @import("pane.zig");
 
@@ -461,7 +462,7 @@ pub fn writeEvent(p: *Pardes, req: Req, id: usize) Reply {
         const text = p.scratch.allocator().dupe(u8, whole[lo..hi]) catch continue;
         switch (r.action) {
             .body_exec, .tag_exec => _ = p.execute(live, text),
-            .body_look, .tag_look => p.lookAt(live, text),
+            .body_look, .tag_look => look.lookAt(p, live, text),
             else => unreachable,
         }
     }
diff --git a/src/ninep/pane.zig b/src/ninep/pane.zig
index 24398445..4110380a 100644
--- a/src/ninep/pane.zig
+++ b/src/ninep/pane.zig
@@ -3,6 +3,7 @@
 //! mark and scroll, errors, event, look and exec. Terminals add pty/ (pty.zig).
 const std = @import("std");
 const pardes = @import("../pardes.zig");
+const look = @import("../look.zig");
 const panes = @import("../panes.zig");
 const modal = @import("../modal.zig");
 const config = @import("../config.zig");
@@ -564,7 +565,7 @@ pub fn nameBuffer(p: *Pardes, id: usize, full: []const u8, preserve_tag: bool) !
     f.context_revision = null;
     pane.context_rows = 0;
     pane.wrap_n = 0;
-    p.invalidateLookHover(id);
+    look.invalidateLookHover(p, id);
     p.emit(.{ .watch = .{ .pane = @intCast(id), .on = false } });
     events.noteLog(p, .rename, pane);
 }